Novel flexible air inlet casing

Abstract

The utility model discloses a novel flexible air inlet casing, which relates to the field of fuel cell systems and comprises an air inlet casing, a main airflow channel and a backflow airflow channel are arranged in the air inlet casing, a partition plate is further arranged in the air inlet casing, and a gap is arranged between the lower portion of the partition plate and the inner wall of the air inlet casing. The gap is communicated between the main airflow channel and the backflow airflow channel, the flexible piece is fixedly arranged on the inner wall above the gap, and based on the arrangement of the flexible piece, the change of the circulation capacity can be realized through the variable cross section, so that the system has more adjustment ranges and change degrees, better services are provided for users, and the user experience is improved. When main air flow in the main air flow channel flows into the backflow air flow channel, the air pushes the flexible piece to elastically deform, so that the flexible piece swings within a certain range, the air is damped and buffered, and the surge phenomenon is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell systems, and particularly relates to a new flexible air intake casing. Background Art

[0002] At present, the traditional air intake casing is a fixed air intake and return air channel structure, aiming to broaden the anti-surge ability under small flow rates. However, the anti-surge ability of the fixed type is related to efficiency. If the return air is increased, surge phenomena are likely to occur at the air intake and return air channel structure.

[0003] Therefore, we provide a new flexible air intake casing to solve the above problems. Summary of the Utility Model

[0004] In view of the problems existing in the above-mentioned prior art, the utility model provides a new flexible air intake casing to solve the problem that surge phenomena are likely to occur at the air intake and return air channel structure if the return air is increased.

[0005] To achieve the above purpose, a new flexible air intake casing adopted by the utility model includes an air intake casing. A main air flow channel and a return air flow channel are arranged inside the air intake casing. A partition is also arranged inside the air intake casing. A gap is arranged between the lower part of the partition and the inner wall of the air intake casing. The gap communicates between the main air flow channel and the return air flow channel. A flexible sheet is fixedly arranged on the inner wall above the gap.

[0006] As a further optimization of the above scheme, a gas channel is arranged in the partition. An air inflation port is arranged on the outer surface of the air intake casing. A cavity is arranged inside the flexible sheet. One end of the gas channel communicates with the cavity, and the other end of the gas channel communicates with the air inflation port.

[0007] As a further optimization of the above scheme, a pressure sensor is fixedly installed on the inner wall of the main air flow channel. An air inflation pump is connected to the air inflation port.

[0008] As a further optimization of the above scheme, the pressure sensor is connected to the air inflation pump through a controller. The pressure sensor is used to monitor the gas pressure inside the main air flow channel. When the pressure sensor monitors the gas pressure inside the main air flow channel, this information is fed back to the controller, and the controller controls the air inflation pump to start.

[0009] As a further optimization of the above scheme, a distance is maintained between the lower end of the flexible sheet and the inner wall of the return air flow channel.

[0010] The new flexible air intake casing of the utility model has the following beneficial effects:

[0011] A new flexible intake casing of the present utility model, based on the arrangement of flexible sheets, can achieve a change in flow capacity through a variable cross-section, enabling the system to have a greater adjustment range and degree of variation, and better serving users. When the main air flow in the main air flow channel flows into the return air flow channel, the gas pushes the flexible sheet to elastically deform, causing the flexible sheet to swing within a certain range, thereby damping and buffering the gas and reducing the surge phenomenon;

[0012] In the present utility model, by inflating the inside of the flexible sheet, the elastic deformation ability of the flexible sheet can be changed, and the damping and buffering ability of the flexible sheet to the air flow can be adjusted according to the change in the size of the air flow;

[0013] When the air pump is started to automatically inflate the cavity, the elastic deformation ability of the flexible sheet can be changed, achieving the purpose of automatically adjusting to the size of the air flow;

[0014] When the air flow entering the return air flow channel is abnormal or too large and needs to be repaired, the air pump can also be used to inflate the inside of the flexible sheet, causing the flexible sheet to expand and temporarily block the return air flow channel for waiting for repair, which is convenient to use.

[0015] Referring to the following description and the accompanying drawings, specific embodiments of the present utility model are disclosed in detail, indicating the ways in which the principles of the present utility model can be adopted. It should be understood that the embodiments of the present utility model are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present utility model include many changes, modifications, and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic structural diagram of the new flexible intake casing in Embodiment 1 of the present utility model;

[0017] Figure 2 Schematic structural diagram of the virtual line of the rotation range of the flexible sheet of the present utility model;

[0018] Figure 3 For the present utility model Figure 2 Enlarged schematic structural diagram of part A;

[0019] Figure 4 Schematic structural diagram of the new flexible intake casing in Embodiment 2 of the present utility model;

[0020] Figure 5 For the present utility model Figure 4 Enlarged schematic structural diagram of part B;

[0021] Figure 6 Schematic structural diagram of the new flexible intake casing in Embodiment 3 of the present utility model.

[0022] In the figure: 1. Inlet casing; 11. Main air flow channel; 12. Recirculation air flow channel; 101. Main air flow; 121. Recirculation air flow; 2. Flexible sheet; 21. Cavity; 3. Partition; 31. Gas channel; 32. Inflation port; 4. Pressure sensor; 5. Inflation pump. Detailed implementation mode

[0023] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0024] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected, connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. "Fixed connection" means a fixed connection, and there are many ways of fixed connection, which are not within the scope of protection of this article. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for the purpose of illustration and do not represent the only implementation mode.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of this article are only for the purpose of describing specific implementation modes and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items;

[0026] Example 1, please refer to the attached drawings of the specification Figures 1-3 The present utility model provides a technical solution: a new flexible inlet casing, including: a flexible sheet 2, and the flexible sheet 2 is installed in the inlet casing 1. Through the setting of the flexible sheet 2, the air flow can be adjusted under various operating conditions, and the anti-surge ability of the inlet casing 1 can be improved.

[0027] Generally, a fixed inlet casing optimizes the flow capacity of the compressor by the characteristic of air flow recirculation and separately collects the recirculation gas generated during surging. A main air flow channel 11 and a recirculation air flow channel 12 are provided inside the inlet casing 1. The main air flow channel 11 has a main air flow 101, and the recirculation air flow channel 12 has a recirculation air flow 121.

[0028] However, since the flow capacity of the fixed type is restricted by the structural geometry, the degree of optimization is limited and cannot vary according to the actual situation. For example, when the main air flow increases, although part of the air flow is discharged through the return air flow channel 12, the air flow in the main air flow channel 11 is still relatively large, resulting in a relatively serious surge phenomenon inside the intake casing 1. The present utility model solves this problem based on this pain point. Based on the setting of the flexible sheet 2, the flow capacity can be changed through the variable cross-section.

[0029] Make the system have a wider adjustment range and degree of variation, and better serve users.

[0030] As is well known, the flow rate and pressure are different under different working conditions, and the required rotational speed of the compressor will also be different. The triangular regions formed by the gas inlets corresponding to different rotational speeds, flow rates, and pressures are also different. Therefore, the present utility model can change the cross-sectional area of the inlet and the variation of the return groove by using the flexible adjustable structure. This flexible adjustable structure is very applicable and can be adjusted under various operating conditions, so that the high-efficiency area of the impeller follows the change of the angle of the flexible adjustable structure.

[0031] In the present utility model, the flexible adjustable structure specifically uses the flexible sheet 2, and the flexible sheet 2 can be made of an elastically deformable material such as rubber. When the main air flow in the main air flow channel 11 flows into the return air flow channel 12, the gas pushes the flexible sheet 2 to elastically deform, causing the flexible sheet 2 to swing within a certain range, thereby damping and buffering the gas and reducing the surge phenomenon.

[0032] Specifically, a partition 3 is arranged inside the intake casing 1. There is a gap between the lower part of the partition 3 and the inner wall of the intake casing 1. The gap is communicated between the main air flow channel 11 and the return air flow channel 12. The flexible sheet 2 is fixedly connected to the inner wall above the gap.

[0033] Embodiment 2, please refer to the specification appendix Figure 1 and Figures 4 to 5 , the present utility model provides a technical solution: a new flexible intake casing. A gas channel 31 is arranged in the partition 3. An air inlet 32 is arranged on the outer surface of the intake casing 1. A cavity 21 is arranged inside the flexible sheet 2. One end of the gas channel 31 is communicated with the cavity 21, and the other end of the gas channel 31 is communicated with the air inlet 32.

[0034] During normal operation, the inflation port 32 is blocked by a rubber seal or other sealing means. When the airflow in the main airflow channel 11 is large, air can be inflated into the gas channel 31 through the position of the inflation port 32. The gas enters the cavity 21 through the gas channel 31, causing the flexible sheet 2 to expand, thereby reducing the elastic deformation ability of the flexible sheet 2. At this time, even when the airflow speeds in the main airflow channel 11 and the return airflow channel 12 are relatively fast, it can only push the flexible sheet 2 to swing within a certain range, achieving the functions of shock absorption and buffering for the airflow.

[0035] This replaces the method of directly setting the flexible sheet 2 with a fixed elastic deformation ability. When the elastic deformation ability of the flexible sheet 2 is fixed, when the flexible sheet 2 is impacted by a large airflow, it may directly adhere to the upper inner wall of the return airflow channel 12, causing the flexible sheet 2 to always adhere to the upper inner wall of the return airflow channel 12. At this time, it is impossible to shock-absorb and buffer the airflow. Therefore, in the present invention, based on the ability to inflate the inside of the flexible sheet 2 to change the elastic deformation ability of the flexible sheet 2, it can adapt to changes in the airflow size and adjust the shock-absorbing and buffering ability of the flexible sheet 2 for the airflow.

[0036] Example 3, please refer to the attached drawings of the specification Figures 1 to 6 The present invention provides a technical solution: a new flexible inlet casing. A pressure sensor 4 is fixedly installed on the inner wall of the main airflow channel 11. An air pump 5 is connected to the inflation port 32. The pressure sensor 4 and the air pump 5 are connected through a controller. The pressure sensor 4 can monitor the gas pressure inside the main airflow channel 11. When the pressure sensor 4 monitors the gas pressure inside the main airflow channel 11, it can feedback this information to the controller, and the controller controls the air pump 5 to start. Therefore, when the pressure sensor 4 monitors that the airflow pressure inside the main airflow channel 11 is large, the air pump 5 starts to automatically inflate the cavity 21, which can change the elastic deformation ability of the flexible sheet 2, achieving the purpose of automatically adjusting and adapting to the airflow size.

[0037] Furthermore, when the airflow entering the return airflow channel 12 is abnormal or too large and needs to be repaired, the air pump 5 can also be used to inflate the inside of the flexible sheet 2, causing the flexible sheet 2 to expand and temporarily block the return airflow channel 12, waiting for repair, which is convenient to use.

[0038] These are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, or improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A new flexible air intake casing, comprising an air intake casing (1), wherein a main air flow channel (11) and a return air flow channel (12) are arranged inside the air intake casing (1), characterized in that: A partition (3) is also provided inside the air intake casing (1), a gap is provided between the lower part of the partition (3) and the inner wall of the air intake casing (1), the gap is connected between the main air flow channel (11) and the return air flow channel (12), and a flexible sheet (2) is fixedly provided on the inner wall above the gap.

2. A new flexible air intake casing according to claim 1, characterized in that: A gas channel (31) is provided in the partition (3), a gas charging port (32) is provided on the outer surface of the air intake casing (1), a cavity (21) is provided inside the flexible sheet (2), one end of the gas channel (31) is connected to the cavity (21), and the other end of the gas channel (31) is connected to the gas charging port (32).

3. A new flexible air intake casing according to claim 2, characterized in that: A pressure sensor (4) is fixedly mounted on the inner wall of the main air flow channel (11), and an air pump (5) is connected to the air filling port (32).

4. A new flexible air intake casing according to claim 3, characterized in that: The pressure sensor (4) is connected to the air pump (5) via a controller. The pressure sensor (4) is used to monitor the gas pressure inside the main air flow channel (11). When the pressure sensor (4) detects the gas pressure inside the main air flow channel (11), this information is fed back to the controller, and the controller controls the air pump (5) to start.

5. A new flexible air intake casing according to claim 1, characterized in that: A distance is maintained between the lower end of the flexible sheet (2) and the inner wall of the return air flow channel (12).

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