CN219286465U - Variable cross-section ejector - Google Patents

Abstract

The utility model discloses a variable cross section ejector, which relates to the technical field of fuel cells and comprises a chassis, a fixed disc, a transmission column and a shutter mechanism chassis, wherein the chassis and the fixed disc are connected with the transmission column, the fixed disc is provided with a fixed bolt, both ends of the transmission column are respectively provided with a first transmission tooth and a second transmission tooth, the shutter mechanism chassis is provided with a matched transmission belt, the second transmission tooth is in transmission connection with the shutter mechanism chassis through the transmission belt, the shutter mechanism chassis is provided with at least 2 ball balls and at least 2 rotating blades, the rotating blades are movably arranged on the shutter mechanism chassis, the fixed disc is sleeved with a net cover, the net cover comprises a top cover and a grid, the top cover and the grid are rigidly connected, the top cover, the rotating blades and the shutter mechanism chassis are movably connected and are matched in shape and size, and can change the cross section of a nozzle opening according to the power of a galvanic pile and the hydrogen quantity required by the galvanic pile.

Description

Variable cross-section ejector

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a variable cross-section ejector.

Background

The fuel cell system for a vehicle is generally composed of four parts, namely an air supply system, a hydrogen supply system, a water heat management system and a system control system. The hydrogen supply system has two modes of anode dead-end and hydrogen circulation. The hydrogen circulation mode can improve the utilization rate of hydrogen, and meanwhile, the hydrogen circulation can improve the water balance in the electric pile to avoid flooding in the electric pile, so that the working efficiency of the electric pile is improved. The working performance of the circulating device in the hydrogen circulating system directly influences the hydrogen circulating effect.

The ejector is mainly used as a circulating device in a hydrogen circulating system, hydrogen coming out of the hydrogen storage bottle is mixed with recirculated hydrogen in the ejector and enters the fuel cell stack, and the circulating ratio of the recirculated hydrogen reflects the working performance of the ejector. The ejector is a mechanical component, and the cross-sectional area of the nozzle opening of the ejector has an important influence on the working performance of the ejector, such as the ejection ratio. When the hydrogen amount required by the galvanic pile at low power output or reaction is very small, the hydrogen flow entering the ejector from the hydrogen storage bottle can be reduced, and under the working condition, the ejector performance of the ejector can be reduced or even the ejector effect is not achieved. Therefore, how to improve the injection ratio of the injector and widen the working range of the injector are important points of injector research.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a variable cross-section ejector, which aims to solve the technical problems in the related art to a certain extent.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a variable cross section ejector, including the chassis, the fixed disk, transmission post and shutter mechanism chassis, wherein chassis and fixed disk all are connected with the transmission post, the fixed disk is equipped with the gim peg, transmission post both ends are equipped with first transmission tooth and second transmission tooth respectively, shutter mechanism chassis is equipped with assorted drive belt, second transmission tooth and shutter mechanism chassis pass through the drive of drive belt and are connected, shutter mechanism chassis is equipped with 2 at least ball and 2 at least rotor blade, rotor blade movably sets up on shutter mechanism chassis, the cover is equipped with the screen panel on the fixed disk, the screen panel includes top cap and grid, top cap and grid rigid connection, top cap, rotor blade and shutter mechanism chassis swing joint and shape size looks adaptation.

On the basis of the technical scheme, the ejector is also provided with a fixed table, and the fixed table is rigidly connected with the chassis and the fixed disc or integrally formed.

On the basis of the technical scheme, the fixing disc is also provided with a gasket, the chassis is provided with a gasket groove, and the gasket groove is matched with the gasket.

On the basis of the technical scheme, the mesh enclosure is provided with the fixing ring, and the fixing ring is fixed on the fixing disc through the fixing bolt.

On the basis of the technical scheme, the first transmission gear, the shutter mechanism chassis, the rotating blades and the transmission belt are made of hard plastics, carbon fiber materials or glass fiber reinforced plastic materials.

On the basis of the technical scheme, the gasket is made of one of rubber or nylon materials or foamed plastic materials.

On the basis of the technical scheme, the chassis and the fixed disc are both movably connected with the transmission column.

Compared with the prior art, the utility model has the advantages that:

compared with the prior art, the variable section ejector can change the cross section area of the nozzle opening according to the power of the electric pile and the hydrogen amount required by the electric pile, and has the advantages of small occupied space, easiness in quick switch closing and good sealing effect. In the working process of the ejector, the opening and closing of the shutter mechanism can be controlled to control the flow of the recycle gas of the hydrogen circulation loop, more specifically, the working performance of the ejector can be automatically controlled, so that the recycle quantity of the recycle gas is increased by reducing the cross section area of the nozzle under the low-power working condition of the electric pile.

Drawings

FIG. 1 is a schematic diagram of an exploded view of a variable section ejector according to an embodiment of the present utility model;

FIG. 2 is a side view of an injector nozzle configuration in an embodiment of the utility model;

FIG. 3 is a front view of the structure of an ejector nozzle in an embodiment of the present utility model;

FIG. 4 is a top view of an injector nozzle configuration in an embodiment of the utility model;

FIG. 5 is a cross-sectional view taken along the direction A-A in an embodiment of the present utility model;

fig. 6 is a schematic diagram of a mesh enclosure in an embodiment of the utility model;

fig. 7 is a three view showing the general appearance of a variable section ejector according to an embodiment of the present utility model.

In the figure: 1-chassis, 2-fixed disk, 21-dead bolt, 3-drive post, 31-first transmission tooth, 32-second transmission tooth, 4-fixed station, 5-ball, 6-shutter mechanism chassis, 7-rotor blade, 8-drive belt, 9-screen panel, 91-top cap, 92-grid, 10-packing ring.

Detailed Description

Embodiments of the present utility model are described in further detail below with reference to the accompanying drawings.

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "at … …" or "responsive to a determination", depending on the context.

In the description of the present utility model, unless otherwise specified and defined, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly through intermediaries, as would be understood by those skilled in the art, in view of the specific meaning of the terms described above.

Referring to fig. 1, an exploded structure schematic diagram of a variable section ejector in an embodiment of the present utility model includes a chassis 1, a fixed disc 2, a driving column 3 and a shutter mechanism chassis 6, wherein the chassis 1 and the fixed disc 2 are connected with the driving column 3, two ends of the driving column 3 are respectively provided with a first driving tooth 31 and a second driving tooth 32, the shutter mechanism chassis 6 is provided with a matched driving belt 8, the second driving tooth 32 is in driving connection with the shutter mechanism chassis 6 through the driving belt 8, the shutter mechanism chassis 6 is provided with at least 2 ball balls 5 and at least 2 rotating blades 7, the rotating blades 7 are movably arranged on the shutter mechanism chassis 6, a mesh enclosure 9 is sleeved on the fixed disc 2, the mesh enclosure 9 includes a top cover 91 and a mesh grille 92, and the top cover 91 is rigidly connected with the mesh grille 92. The first transmission gear 31 is connected with the power equipment, and the second transmission gear 32 is connected with the shutter mechanism chassis 6.

Referring to fig. 2, which is a side view of a variable section ejector in the embodiment of the present utility model, a top cover 91 and a rotating blade 7 are movably connected with a shutter mechanism chassis 6 and are adapted in shape and size, and form a rotating shutter mechanism to realize opening and closing of a nozzle opening.

Wherein shutter mechanism chassis 6 and top cap 91 agree with each other, shutter mechanism chassis 6 be equipped with rotor blade 7 matched with notch, rotor blade 7 set up with this notch in, rotor blade 7 is equipped with the ejector pin, top cap 91 is equipped with in ejector pin matched with sliding tray, wherein ejector pin and sliding tray relative motion make rotor blade 7 rotate around shutter mechanism chassis 6 center, realize adjusting the size that opens and shuts of nozzle mouth.

Referring to fig. 3, which is a side view of the variable section ejector in the embodiment of the present utility model, the ejector is further provided with a fixed table 4, and the fixed table 4 is rigidly connected or integrally formed with the chassis 1 and the fixed disc 2.

Referring to fig. 4, which shows a top view of a variable section ejector according to an embodiment of the present utility model, the fixed disk 2 is provided with a fixing bolt 21, and the fixing bolt 21 fixes the mesh enclosure 9 on the fixed disk 2, thereby protecting each transmission assembly from interference and preventing components from being offset.

Referring to the sectional view A-A of the embodiment of the utility model shown in fig. 5, the fixing plate 2 is further provided with a gasket 10, and the chassis 1 is provided with a gasket groove which is matched with the gasket 10. The gasket 10 is made of one of rubber or nylon materials or foamed plastic materials, and the gasket 10 is used for matching to realize the tightness of the sleeve structure sleeved in the ejector, so that the air tightness of the ejector is ensured.

Referring to the diagram of the mesh enclosure in the embodiment of the utility model shown in fig. 6, the mesh enclosure 9 is provided with a fixing ring 93, and the fixing ring 93 is fixed on the fixing plate 2 through a fixing bolt 21.

Because hydrogen is inflammable and explosive, safety problems need to be considered in the injection process, and relative movements such as meshing or sliding occur among transmission structural members, particularly contact members, and electrostatic sparks are prevented from occurring, in the application, the first transmission teeth 31, the shutter mechanism chassis 6, the rotating blades 7 and the transmission belt 8 are made of hard plastics, carbon fiber materials or glass fiber reinforced plastics, and the ball balls 5 are made of glass or plastic materials.

The chassis 1 and the fixed disk 2 are both movably connected with the transmission column 3. The relative positions of the chassis 1 and the fixed disk 2 defining the drive column 3 are not shifted.

Referring to fig. 7, which is a three-view overall view of the variable section ejector according to an embodiment of the present utility model, the present application is adapted to: the top cover 91, the rotating blades 7 and the shutter mechanism chassis 6 are combined into a rotary shutter mechanism, and the external power equipment sequentially transmits power through the transmission column 3, the transmission belt 8 and the shutter mechanism chassis 6, so that the opening and closing movement of the rotating blades 7 is finally controlled; during operation, the motor is driven to rotate, and the motor is sequentially driven by the driving post 3, the driving belt 8 and the shutter mechanism chassis 6 to cause the shutter mechanism chassis 6 to rotate relative to the rotating blades 7, so that the rotating blades 7 rotate around the geometric center of the shutter mechanism chassis 6 to realize the change of the opening size and further control the change of the caliber size of the nozzle.

Compared with the prior art, the variable section ejector can change the cross section area of the nozzle opening according to the power of the electric pile and the hydrogen amount required by the electric pile, and has the advantages of small occupied space, easiness in quick switch closing and good sealing effect.

The utility model is not limited to the embodiments described above, but a number of modifications and adaptations can be made by a person skilled in the art without departing from the principle of the utility model, which modifications and adaptations are also considered to be within the scope of the utility model. What is not described in detail in this specification is prior art known to those skilled in the art.

Claims (8)

1. A variable cross-section ejector, characterized by: including chassis (1), fixed disk (2), transmission post (3) and shutter mechanism chassis (6), wherein chassis (1) and fixed disk (2) all are connected with transmission post (3), fixed disk (2) are equipped with gim peg (21), transmission post (3) both ends are equipped with first drive tooth (31) and second drive tooth (32) respectively, shutter mechanism chassis (6) are equipped with assorted drive belt (8), second drive tooth (32) and shutter mechanism chassis (6) pass through drive belt (8) transmission and are connected, shutter mechanism chassis (6) are equipped with at least 2 ball balls (5) and at least 2 rotor blade (7), rotor blade (7) movably set up on shutter mechanism chassis (6), the cover is equipped with screen panel (9) on fixed disk (2), screen panel (9) are including top cap (91) and grid (92), top cap (91) and grid (92) rigid connection, top cap (91), rotor blade (7) and shutter mechanism chassis (6) swing joint and shape size looks adaptation.

2. A variable cross-section ejector according to claim 1, wherein: the ejector is also provided with a fixed table (4), and the fixed table (4) is rigidly connected with the chassis (1) and the fixed disc (2) or integrally formed.

3. A variable cross-section ejector according to claim 1, wherein: the fixing disc (2) is also provided with a gasket (10), the chassis (1) is provided with a gasket groove, and the gasket groove is matched with the gasket (10).

4. A variable cross-section ejector according to claim 1, wherein: the net cover (9) is provided with a fixing ring (93), and the fixing ring (93) is fixed on the fixing disc (2) through a fixing bolt (21).

5. A variable cross-section ejector according to claim 1, wherein: the first transmission teeth (31), the shutter mechanism chassis (6), the rotating blades (7) and the transmission belt (8) are made of hard plastics, carbon fiber materials or glass fiber reinforced plastics materials.

6. A variable cross-section ejector as claimed in claim 3, wherein: the gasket (10) is made of one of rubber or nylon materials or foamed plastic materials.

7. A variable cross-section ejector according to claim 1, wherein: the chassis (1) and the fixed disc (2) are both movably connected with the transmission column (3).

8. A variable cross-section ejector according to claim 1, wherein: the ball (5) is glass or plastic.

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