Hydrogen fuel engine intake manifold structure

Abstract

The application discloses a hydrogen fuel engine air inlet manifold structure and belongs to the technical field of air inlet manifolds. The hydrogen fuel engine air inlet manifold structure comprises an air inlet manifold and a flange cover. The air inlet manifold is provided with an air inlet and uniformly distributed air outlets. The flange cover is provided with a connecting pipe communicated with the air outlets and elastic cooling fins fixed on the flange. The flange cover comprises a flange plate butted with the air outlets and a connecting plate fixed on the flange plate. A gap and a cavity are arranged between the flange cover and the connecting pipe. A sealing ring is arranged on the periphery of the connecting pipe. The hydrogen fuel engine air inlet manifold structure has the beneficial effect that the movable gap space is deformed to release thermal stress caused by heat, thereby avoiding the leakage caused by the thermal stress, and ensuring the reliability of sealing and connection.

Description

Technical Field

[0001] This application relates to the field of intake manifold technology, and more specifically, to an intake manifold structure for a hydrogen fuel cell engine. Background Technology

[0002] The intake manifold is an important component of the engine, mainly used to connect the air filter and the engine cylinder chamber. It is the engine's air supply component. The intake manifold mainly includes a guide section, an intake section connecting the guide section, and at least two exhaust sections. The intake manifold is rigidly connected to the cylinder head and engine block. When cold, all connection parts are properly sealed, with no sealing or reliability issues. However, when the existing stainless steel exhaust manifold is heated by the high temperature of the exhaust during engine operation, air leakage may occur at the sealing parts. Even the flanges or bolts used for connection may crack or break, posing a reliability risk.

[0003] Therefore, a hydrogen fuel cell engine intake manifold structure is needed to solve the above problems. Utility Model Content

[0004] The summary section of this application is intended to provide a brief overview of the concepts, which will be described in detail in the detailed description section below. This summary section is not intended to identify key or essential features of the claimed technical solutions, nor is it intended to limit the scope of the claimed technical solutions.

[0005] To address the technical problems mentioned in the background section, some embodiments of this application provide a hydrogen fuel cell engine intake manifold structure, including: an intake manifold and a flange cover. The intake manifold has an intake port at its front end and an outlet at its lower end. The flange cover includes a flange for contacting the outlet and a connecting plate for fixing the flange. Threaded holes are provided between the intake manifold, the outlet, and the flange on the flange cover. The threaded holes, distributed vertically, are coaxially aligned. A connecting pipe is abutted against the flange cover. A connecting sleeve extends upward from the upper end of the connecting pipe and is inserted into the outlet. An outlet chamber is provided between the outlet and the connecting pipe. A sealing ring is provided at the connecting pipe, and the sealing ring is disposed between the flange cover and the connecting pipe.

[0006] Furthermore, the connecting pipe and the flange cover are respectively provided with vertically distributed gaps and cavities, the sealing ring is disposed in the cavity, the width of the gap is equal to the width from the outer wall of the cavity to the outer circumference of the sealing ring, the outer end of the flange cover is fixedly provided with an elastic heat sink, the flange cover and the elastic heat sink are integrally formed, and a sealing gasket is installed at the lower end of the connecting pipe.

[0007] Furthermore, the lower end of the flange cover is provided with three sets of evenly distributed connecting holes, each set of connecting holes is symmetrically arranged, and the lower side of each gap is provided with an air groove, the air groove is arranged in a ring and communicates with the connecting holes distributed on the left and right. The lower end face of the flange cover and the connecting pipe are set on the same plane. The upper end of the flange cover is fixed with three evenly distributed air outlet chambers, the number of which is the same as the number of sets of connecting holes. The lower end of the detector body is connected to two piezoresistive sensors or an ultrasonic sensor, and an alarm light is connected above the two piezoresistive sensors on the same side.

[0008] The beneficial effects of this application are as follows:

[0009] 1. The air outlet is connected through a connecting pipe, creating a gap and cavity between the connecting pipe and the flange cover. This gap and cavity allow for deformation when heated, releasing the thermal stress and preventing air leakage caused by thermal stress. This ensures the reliability of the seal and connection.

[0010] 2. The elastic heat dissipation fins, which are integrally fixed to the outer end of the flange cover, absorb the heat concentrated on the outer edge of the flange cover and dissipate heat through contact with the outside air. This reduces the deformation at the edge of the flange cover and prevents the bolts from breaking or slipping due to yielding or deformation (such as warping) at the edge of the flange cover. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the application and to make other features, objects, and advantages of the application more apparent. The illustrative embodiments and descriptions of this application are used to explain the application and do not constitute an undue limitation of the application.

[0012] Furthermore, throughout the accompanying drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the elements are not necessarily drawn to scale.

[0013] In the attached diagram:

[0014] Figure 1 This is an overall schematic diagram of an embodiment of a hydrogen fuel cell engine intake manifold structure according to this application;

[0015] Figure 2 This is an overall schematic diagram of an embodiment of a hydrogen fuel cell engine intake manifold structure according to this application;

[0016] Figure 3 yes Figure 1 A schematic diagram of the overall appearance of the intake manifold in the embodiment;

[0017] Figure 4yes Figure 2 Cross-sectional schematic diagram in the embodiment;

[0018] Figure 5 yes Figure 2 A partially enlarged schematic diagram of the connecting hole in the embodiment;

[0019] Figure 6 This is a partial sectional view of the flange cover section;

[0020] Figure 7 yes Figure 1 A cross-sectional structural diagram of the embodiment.

[0021] Figure label:

[0022] 10. Intake manifold; 11. Inlet; 12. Outlet; 13. Flange cover; 14. Threaded hole; 15. Connecting pipe; 16. Sealing ring; 17. Gap; 18. Opening; 19. Elastic heat sink; 20. Air groove; 21. Connecting hole; 22. Detection probe; 23. Detector body; 24. Outlet chamber; 25. Sealing gasket; 26. Conical gasket. Detailed Implementation

[0023] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0024] It should also be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings. Unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other.

[0025] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0026] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0027] This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] Reference Figure 1-7A hydrogen fuel cell engine intake manifold structure includes: an intake manifold 10 and a flange cover 13. The intake manifold 10 has an intake port 11 at its front end and an outlet port 12 connected to its lower end. The flange cover 13 includes a flange for contacting the outlet port 12 and a connecting plate for fixing the flange. Threaded holes 14 are provided between the intake manifold 10, the outlet port 12, and the flange on the flange cover 13. The threaded holes 14 are coaxially arranged. A connecting pipe 15 is abutted against the flange cover 13. A connecting sleeve is provided at the upper end of the connecting pipe 15, extending upwards and inserting into the outlet port 12. An outlet chamber 24 is provided between the outlet port 12 and the connecting pipe 15. A sealing ring 16 is provided at the connecting pipe 15, positioned between the flange cover 13 and the connecting pipe 15. Openings are provided between the connecting pipe 15 and the flange cover 13. The flange cover 13 has a gap 17 and an opening 18 distributed vertically. A sealing ring 16 is placed inside the opening 18 and is fitted around the outer periphery of the connecting pipe 15. The width of the gap 17 is equal to the width distance from the outer wall of the opening 18 to the outer periphery of the sealing ring 16. An elastic heat sink 19 is fixedly provided on the outer end of the flange cover 13. The elastic heat sink 19 is fixedly set on the outer periphery of the flange of the flange cover 13 in a wave-like manner. A heat exchange area is provided between the wave grooves for heat dissipation. The flange cover 13 and the elastic heat sink 19 are integrally formed. A sealing gasket 25 is installed at the lower end of the connecting pipe 15. The upper opening of the threaded hole 14 is tapered and faces inward and downward. A tapered gasket 26 is provided at the upper tapered opening of the threaded hole 14. The sealing gasket 25 is pressurized by the bolt at the threaded hole 14 and is tightly fitted to the connecting pipe 15 and the flange on the cylinder head.

[0029] Reference Figure 2 , 4 -5. The lower end of the flange cover 13 is provided with three sets of evenly distributed connecting holes 21. Each set of connecting holes 21 is symmetrically arranged. The lower side of each gap 17 is connected to an air groove 20. The air groove 20 is arranged in a ring and communicates with the connecting holes 21. The lower end face of the flange cover 13 and the connecting pipe 15 are set on the same plane. The upper end of the flange cover 13 is fixed with three evenly distributed air outlet chambers 24. The number of air outlet chambers 24 is the same as the number of sets of connecting holes 21. The upper end of the connecting plate of the flange cover 13 is fixed with a detector body 23. A detection probe 22 is connected to the detector body 23. The detection probe 22 extends downward and is inserted into the connecting hole 21. The lower end of the detector body 23 is connected with two piezoresistive sensors or an ultrasonic sensor. An alarm light is connected above the two piezoresistive sensors on the same side. The piezoresistive sensors are inserted downward into the connecting hole 21 to detect the gas flow in the connecting hole 21.

[0030] Working process or usage method:

[0031] 1. Connect the air intake port 11 to the air supply pipeline through the flange, and deliver the fuel mixture to the intake manifold 10. Supply air through the multiple (six) air intake ports 11 opened at the lower end of the intake manifold 10, and supply air through the cylinder head connected to the flange cover 13.

[0032] 2. When installing the bolt at the threaded hole 14, the conical washer 26 is pre-tightened by the bolt, so that the conical washer 26 is embedded in the conical hole above the threaded hole 14, forming a mechanical self-locking, thereby preventing the bolt from rotating under vibration conditions through the friction of the conical surface.

[0033] 3. The connecting pipe 15 is fixed between the flange cover 13 and the air outlet 12. There is a gap 17 and an opening 18 between the connecting pipe 15 and the flange cover 13. The gap 17 and the opening 18 increase the displacement compensation capability during deformation, thereby releasing thermal stress and eliminating or reducing the stress on the intake manifold 10 and the flange cover 13. This ensures the reliability of the seal and connection, avoids air leakage caused by the deformation of the flange cover 13, and further avoids the deterioration of engine emissions caused by exhaust manifold leakage.

[0034] 4. The elastic heat sink 19 integrally formed and set on the outer end of the flange cover 13 can dissipate heat to the periphery and absorb heat from the side of the flange cover 13. This solves the problem that when the edge of the traditional straight rigid flange is heated and expanded, the constraint at the edge is the greatest, which leads to stress concentration at the edge and thus yielding or deformation (such as warping).

[0035] 5. Insert the piezoresistive sensor downward into the connecting hole 21 to detect the gas flow within the connecting hole 21. Under normal conditions, the connecting hole 21 and the gas groove 20 are sealed, and the gas inside flows statically. When a leak occurs at the flange cover 13, the gas will flow through the connecting hole 21 via the connection between the gas groove 20 and the connecting hole 21. During the gas flow, pressure will be applied to the piezoresistive sensor, causing the resistivity of the single-crystal silicon diaphragm on the piezoresistive sensor to change under pressure. An electrical signal output proportional to the pressure can be obtained through the measuring circuit. By using an ultrasonic sensor to detect the gas flow, turbulence will be generated when the fluid passes through the leak point. The turbulence will generate a strong ultrasonic signal, which is detected by an ultrasonic detector to determine whether a leak has occurred.

[0036] The above description is merely a selection of preferred embodiments of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in the embodiments of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described inventive concept. For example, technical solutions formed by substituting the above-described features with (but not limited to) technical features with similar functions disclosed in the embodiments of this disclosure.

Claims

1. An intake manifold structure for a hydrogen fuel cell engine, characterized in that, include: An intake manifold (10) and a flange cover (13) are provided. The intake manifold (10) is provided with an air inlet (11) and a uniformly distributed air outlet (12). The flange cover (13) is provided with a connecting pipe (15) communicating with the air outlet (12) and an elastic heat sink (19) fixed at the flange. The flange cover (13) includes a flange that mates with the air outlet (12) and a connecting plate fixed to the flange; A gap (17) and an opening (18) are provided between the flange cover (13) and the connecting pipe (15). A sealing ring (16) is provided at the opening (18), and the sealing ring (16) is sleeved on the periphery of the connecting pipe (15).

2. The intake manifold structure for a hydrogen fuel cell engine according to claim 1, characterized in that: The flange cover (13) has an air groove (20) at the bottom of the flange, and a connecting hole (21) is provided on the air groove (20). A detector body (23) is fixed at the upper end of the connecting plate of the flange cover (13). A detection probe (22) is connected to the detector body (23). The detection probe (22) extends downward and is inserted into the connecting hole (21). An air outlet (12) is provided between the air outlet (12) and the connecting pipe (15). An air outlet chamber (24) is provided.

3. The intake manifold structure for a hydrogen fuel cell engine according to claim 1, characterized in that: The flange cover (13) and the lower end face of the connecting pipe (15) are on the same plane. A sealing gasket (25) is installed at the lower end of the connecting pipe (15). The sealing gasket (25) is tightly fitted to the flange portion on the cylinder head.

4. The intake manifold structure for a hydrogen fuel cell engine according to claim 1, characterized in that: The intake manifold (10), the outlet (12), and the flange of the flange cover (13) are connected by threaded holes (14), and the threaded holes (14) distributed vertically are on the same axis.

5. The intake manifold structure for a hydrogen fuel cell engine according to claim 1, characterized in that: The width of the gap (17) is equal to the width distance between the outer wall of the cavity (18) and the outer peripheral surface of the sealing ring (16).

6. The intake manifold structure for a hydrogen fuel cell engine according to claim 1, characterized in that: The elastic heat sink (19) is fixedly installed on the outer periphery of the flange of the flange cover (13) in a wave-like manner, and a heat exchange area is provided between the wave grooves for heat dissipation.

7. The intake manifold structure for a hydrogen fuel cell engine according to claim 4, characterized in that: The upper opening of the threaded hole (14) is provided with a tapered hole, and a tapered gasket (26) is installed at the tapered hole.

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