Fuel cell ejector with adjustable nozzle

Abstract

The invention discloses a fuel cell ejector with an adjustable nozzle, which comprises an ejector main body, the ejector main body is provided with an ejection cavity, one end of the ejector main body is provided with a nozzle mounting hole for mounting the nozzle, the nozzle is provided with a mounting bracket, the ejector main body is provided with a driving mechanism, and the driving mechanism is provided with an adjustable nozzle. And the driving mechanism drives the mounting bracket to move along the axial direction of the ejector main body so as to adjust the depth of the nozzle mounted in the nozzle mounting hole. According to the fuel cell ejector, the whole nozzle structure is driven by the driving mechanism to move in the axial direction of the ejector main body, so that the depth of the nozzle mounted in the nozzle mounting hole is adjusted, the distance between the nozzle outlet and the ejector throat part is adjusted, the optimal distance value is achieved, the working range of the ejector is widened, and the service life of the ejector is prolonged. And the fuel cell ejector is ensured to be in an optimal working state.

Description

Technical Field

[0001] The invention belongs to the technical field of fuel cells, and in particular relates to a fuel cell ejector with an adjustable nozzle. Background Art

[0002] The adjustable nozzle hydrogen-oxygen fuel cell ejector is a device that can adjust the nozzle position and injection parameters to achieve effective ejection of low-pressure gas. It mainly introduces hydrogen into the fuel cell stack through the ejection effect, mixes with oxygen and undergoes a chemical reaction, thereby generating electricity and improving the performance and efficiency of the fuel cell.

[0003] The invention patent with authorization publication number CN 111048803 B discloses a fuel cell engine hydrogen subsystem with adjustable flow, which discloses an ejector that adjusts flow through a proportional pressure regulating valve. However, the distance between the internal nozzle of the ejector and the throat of the ejector cannot be adjusted, which limits the scope of use of the ejector.

[0004] Patent application CN 115898971 A discloses an ejector with a proportional electromagnetically driven needle and a fuel cell with variable flow. The invention discloses an ejector with a proportional electromagnetically driven needle. A solenoid proportional valve is used to adjust the needle's position, thereby varying the nozzle opening and achieving variable flow control. However, this structure requires high assembly precision, and the needle is susceptible to vibration caused by airflow disturbances, affecting airflow stability.

[0005] Existing battery ejectors typically require a threaded nozzle that screws into the ejector's inner cavity for installation or adjusts the nozzle's movement distance to achieve effective ejection. This method is not only complex and time-consuming, but also susceptible to external factors such as vibration and corrosion over time, causing thread stripping. This makes nozzle assembly and adjustment extremely difficult and may even cause the ejector to malfunction. Furthermore, ejectors with proportional electromagnetically driven nozzles require high assembly precision, and the needle is easily affected by airflow disturbances, causing vibration and affecting airflow stability. Summary of the Invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides a fuel cell ejector with an adjustable nozzle.

[0007] A fuel cell ejector with an adjustable nozzle includes an ejector body, the ejector body having an ejection cavity, one end of the ejector body having a nozzle mounting hole for mounting a nozzle, a mounting bracket provided on the nozzle, and a drive mechanism provided on the ejector body. The drive mechanism drives the mounting bracket to move along the axial direction of the ejector body to adjust the depth of the nozzle installed in the nozzle mounting hole.

[0008] Preferably, the driving mechanism includes a motor provided on the ejector body, and a screw driven to rotate by the motor, wherein the screw is arranged along the axial direction of the ejector body; One end of the mounting bracket is fixed to the nozzle, and the other end is provided with a screw sleeve, which has a screw hole for matching with the screw rod.

[0009] More preferably, a guide mechanism is further provided between the ejector body and the mounting bracket for guiding the mounting bracket when it moves along the axial direction of the ejector body.

[0010] More preferably, the guide mechanism includes a guide member provided on the ejector body, the guide member is provided with a guide groove arranged along the axial direction of the ejector body, and the mounting bracket is correspondingly provided with a slider that cooperates with the guide groove.

[0011] More preferably, the end of the mounting bracket fixed to the nozzle is provided with a clamping mechanism for clamping the end of the nozzle away from the nozzle mounting hole.

[0012] More preferably, the clamping mechanism includes a pair of clamping plates for cooperating to clamp the nozzle away from one end of the nozzle mounting hole, and the clamping plate is provided with a locking mechanism at one end close to the screw sleeve for locking the pair of clamping plates together to clamp the nozzle.

[0013] More preferably, the clamping plate is provided with a slot in the circumferential direction at one end close to the screw sleeve; the locking mechanism includes a mounting block with one end fixed to the screw sleeve and the other end inserted into the slot, and the mounting block and the clamping plate are respectively provided with locking sockets on the corresponding sides; the clamping plate is also provided with a locking pull rod which extends into the locking sockets on the mounting block and the clamping plate in turn.

[0014] More preferably, the clamping plate is provided with a mounting shell for installing the locking rod on the side where the locking socket is provided, and the mounting shell is provided with a limit plate that can slide in the mounting shell at one end facing the clamping plate, and the locking rod passes through the side wall of the mounting shell away from the clamping plate and the limit plate in sequence, the locking rod slides with the side wall of the mounting shell and is fixedly connected to the limit plate, the locking rod is located between the limit plate and the side wall of the mounting shell away from the clamping plate and is provided with a reset spring, and the locking rod has a pull block for manual operation at the end away from the clamping plate.

[0015] More preferably, the mounting shell is provided with a slide groove on the outer wall on the side away from the clamping plate, and the slide groove extends to the vicinity of the pull block. A limit block that can move along the slide groove is provided in the slide groove, and the limit block is provided with an insertion rod for supporting the pull block to be pulled outward when it moves to the vicinity of the pull block.

[0016] Preferably, the ejector body is provided with a detachable sealing plate at one end for mounting the nozzle, and the sealing plate is provided with the nozzle mounting hole.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The fuel cell ejector of the present application drives the entire nozzle structure to move axially along the ejector body through a driving mechanism, thereby adjusting the depth of the nozzle installed in the nozzle mounting hole, so as to adjust the distance between the nozzle outlet and the throat of the ejector to achieve the optimal distance value, improve the working range of the ejector, and ensure that the fuel cell ejector is in the optimal working state. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of a fuel cell ejector with an adjustable nozzle according to the present application.

[0019] Figure 2 Schematic diagram of the installation structure of the nozzle and adjacent structures.

[0020] Figure 3 Schematic diagram of the explosion structure of the nozzle and adjacent structures.

[0021] Figure 4 Schematic diagram of the exploded structure of the clamping plate and adjacent structures.

[0022] Figure 5 Schematic diagram of the assembly structure of the installation shell and locking rod.

[0023] Figure 6 This is a structural diagram showing the positional relationship between the insert rod and the locking rod on the mounting shell.

[0024] Figure 7 Schematic diagram of the installation structure of the sealing plate and the ejector body.

[0025] Figure markings: ejector body 1, air outlet 11, air intake 12, slot 13, drive mechanism 14, motor 141, screw 142, guide mechanism 15, guide member 151, guide slot 152, sealing plate 2, nozzle mounting hole 21, latch 22, insert block 23, nozzle 3, mounting bracket 4, screw sleeve 41, screw hole 42, slider 43, clamping mechanism 44, clamping plate 441, slot 442, locking socket 443, locking mechanism 45, mounting block 451, locking socket 452, locking pull rod 453, mounting shell 454, limit plate 455, return spring 456, pull block 457, slot 458, limit block 459, insert rod 4510. DETAILED DESCRIPTION

[0026] like Figures 1 to 7 As shown, a fuel cell ejector with an adjustable nozzle includes an ejector body 1, the ejector body 1 having an ejection cavity, an air outlet 11 at one of the two axial ends of the ejector body 1, and a nozzle 3 installed at the other end. The bottom surface of the ejector body 1 is also provided with an air intake 12. In the fuel cell hydrogen supply system, the fuel cell ejector is used to supply hydrogen to the fuel cell stack, wherein the nozzle 3 is used to spray hydrogen into the ejection cavity at high speed. The structure of the ejection cavity allows the high-speed flowing hydrogen to absorb the recycled hydrogen from the air intake 12 when passing through, and the hydrogen from the two sources is mixed and ejected from the air outlet 11.

[0027] like Figure 2 、 Figure 3 、 Figure 7 As shown, the ejector body 1 is provided with a sealing plate 2 at one end where the nozzle 3 is located. The sealing plate 2 has a nozzle mounting hole 21 in the middle for mounting the nozzle 3. The sealing plate 2 is removably fixed to the end face of the ejector body 1. Specifically, a slot 13 is provided on the edge of the end face of the ejector body 1. The slot 13 has a small opening and a larger interior, and the opening is rectangular. A corresponding latch 22 is provided on the sealing plate 2. The latch 22 passes through the sealing plate 2 along its thickness and is rotatably connected to the sealing plate 2. The end of the latch 22 facing the ejector body 1 has an insert 23. The size of the insert 23 is adapted to the opening of the slot 13, allowing the insert 23 to pass through the opening of the slot 13 at an angle and enter the interior of the slot 13. After the latch 22 rotates an angle, the insert 23 is restrained by the opening of the slot 13, thereby fixing the sealing plate 2 to the ejector body 1. By this fixing method, the fixing method of the sealing plate 2 is changed, and no complicated fixing methods such as threaded screws are required, which is convenient for personnel to replace or maintain. In order to improve the sealing performance of the sealing plate 2 and the ejector body 1, a sealing ring can be set on the mounting surface.

[0028] like Figures 1 to 3As shown, a mounting bracket 4 is provided on the nozzle 3, and a driving mechanism 14 is provided on the ejector body 1. The driving mechanism 14 drives the mounting bracket 4 to move axially along the ejector body 1 to adjust the depth of the nozzle 3 installed in the nozzle mounting hole 21.

[0029] The drive mechanism 14 includes a motor 141 mounted on the ejector body 1 and a screw 142 driven by the motor 141. The screw 142 is arranged axially along the ejector body 1, with one end of the screw 142 extending out of the ejector body 1. A mounting bracket 4 is secured to the nozzle 3 at one end and has a threaded sleeve 41 at the other end. The threaded sleeve 41 has a threaded hole 42 for engaging the screw 142.

[0030] A guide mechanism 15 is provided between the ejector body 1 and the mounting bracket 4, for guiding the mounting bracket 4 as it moves axially along the ejector body 1. This guide mechanism 15 comprises a guide member 151 disposed on the ejector body 1. This guide member 151 is a long, plate-like structure positioned above the screw 142. The guide member 151 is provided with a guide slot 152 axially disposed along the ejector body 1. The mounting bracket 4 is provided with a corresponding slider 43 that engages with the guide slot 152. The slider 43 has its end inserted into the guide slot 152, and its base is integral with the screw sleeve 41.

[0031] like Figure 3 、 Figure 4 As shown, the end of the mounting bracket 4 fixed to the nozzle 3 is provided with a clamping mechanism 44 for clamping the nozzle 3. The clamping mechanism clamps the nozzle 3 at the end away from the nozzle mounting hole 21. The clamping mechanism 44 includes a pair of clamping plates 441 for cooperating to clamp the end of the nozzle 3 away from the nozzle mounting hole 21. The clamping plates 441 are provided with a locking mechanism 45 at the end near the screw sleeve 41 for locking the pair of clamping plates 441 together to clamp the nozzle 3. The clamping surfaces of the clamping plates 441 are provided with anti-slip grooves to enable the clamping plates 441 to tightly clamp the nozzle 3, preventing the nozzle 3 from slipping and ensuring its stability during use.

[0032] like Figure 4 As shown, a slot 442 is circumferentially defined at one end of the clamping plate 441 near the screw sleeve 41. The locking mechanism 45 includes a mounting block 451 with one end secured to the screw sleeve 41 and the other end inserted into the slot 442. The mounting block 451 and the clamping plate 441 each have locking holes on corresponding sides: the mounting block 451 has a locking hole 452, while the clamping plate 441 has a locking hole 443. The clamping plate 441 also has a locking rod 453 that extends into the locking holes on the mounting block 451 and the clamping plate 441, respectively.

[0033] The nozzle 3 is clamped by the clamping plate 441 and the screw 142 in the driving mechanism 14 is rotated to displace the screw sleeve 41, thereby driving the clamping plate 441 and the nozzle 3 to move horizontally back and forth along the central axis of the ejector body 1. The distance between the outlet of the nozzle 3 and the throat of the ejector can be dynamically adjusted to achieve the optimal distance value, thereby increasing the working range of the ejector and ensuring that the fuel cell ejector is in the optimal working state.

[0034] like Figure 5 As shown, the clamping plate 441 is provided with a mounting housing 454 on the side where the locking socket 443 is located, for mounting a locking rod 453. The mounting housing 454 is generally square-shaped and is fixedly connected to the clamping plate 441 by welding or other means. A limit plate 455 is provided on the end of the mounting housing 454 that faces the clamping plate 441, which is slidable within the mounting housing 454. The locking rod 453 passes through the side wall of the mounting housing 454 facing away from the clamping plate 441 and the limit plate 455. The locking rod 453 slides with the side wall of the mounting housing 454 and is fixedly connected to the limit plate 455. As the locking rod 453 is pulled, the limit plate 455 can follow the movement and limit the direction of movement of the locking rod 453. A return spring 456 is provided between the locking rod 453, located between the stop plate 455 and the sidewall of the mounting housing 454 facing away from the clamping plate 441. This return spring 456 is compressed when the locking rod 453 is pulled outward, thereby driving the locking rod 453 back to its original position after it is released. A manually operated pull block 457 is provided at the end of the locking rod 453 away from the clamping plate 441. To operate the locking rod 453, the user pinches the pull block 457 with their fingers and pulls the locking rod 453 outward.

[0035] like Figure 6 As shown, the mounting shell 454 is provided with a slide groove 458 on the outer wall on the side facing away from the clamping plate 441. The slide groove 458 extends to the vicinity of the pull block 457. A stop block 459 is provided in the slide groove 458 and can move along the slide groove 458. The stop block 459 is provided with an insertion rod 4510 for supporting the pull block 457 when it is moved to the vicinity of the pull block 457. During use, when the locking rod 453 is pulled outward, the insertion rod 4510 can be moved to the inside of the pull block 457 by moving the insertion rod 4510. When the locking rod 453 is released, the insertion rod 4510 can abut against the locking rod 453. In addition, a positioning groove is provided on the inner side surface of the pull block 457, so that the end of the insertion rod 4510 can be positioned in the positioning groove, thereby facilitating the operation of the operator and improving the efficiency of removing or replacing the nozzle 3.

[0036] The mounting structure of the mounting bracket 4 makes the installation and disassembly of the nozzle 3 convenient without complicated thread operations, avoiding the situation where the thread is difficult to install or disassemble due to slippage caused by long-term external influences, reducing the operating burden of the operator and improving the practicality and work efficiency of the ejector.

Claims

1. A fuel cell ejector with an adjustable nozzle, comprising an ejector body, the ejector body having an ejection cavity, and one end of the ejector body having a nozzle mounting hole for mounting the nozzle, characterized in that: The nozzle is provided with a mounting bracket, and the ejector body is provided with a driving mechanism, which drives the mounting bracket to move along the axial direction of the ejector body so as to adjust the depth of the nozzle installed in the nozzle mounting hole.

2. The fuel cell ejector with an adjustable nozzle according to claim 1, characterized in that: The driving mechanism includes a motor provided on the ejector body, and a screw driven to rotate by the motor, wherein the screw is arranged along the axial direction of the ejector body; One end of the mounting bracket is fixed to the nozzle, and the other end is provided with a screw sleeve, which has a screw hole for matching with the screw rod.

3. The fuel cell ejector with an adjustable nozzle according to claim 2, characterized in that: A guide mechanism is also included between the ejector body and the mounting bracket for guiding the mounting bracket when it moves along the axial direction of the ejector body.

4. The fuel cell ejector with an adjustable nozzle according to claim 3, characterized in that: The guide mechanism includes a guide member provided on the ejector body, the guide member is provided with a guide slot arranged along the axial direction of the ejector body, and the mounting bracket is correspondingly provided with a slider that cooperates with the guide slot.

5. The fuel cell ejector with an adjustable nozzle according to claim 2, characterized in that: The end of the mounting bracket that is fixed to the nozzle is provided with a clamping mechanism for clamping the end of the nozzle away from the nozzle mounting hole.

6. The fuel cell ejector with an adjustable nozzle according to claim 5, characterized in that: The clamping mechanism includes a pair of clamping plates for cooperating to clamp the nozzle away from one end of the nozzle mounting hole. The clamping plates are provided with a locking mechanism at one end close to the screw sleeve for locking the pair of clamping plates together to clamp the nozzle.

7. The fuel cell ejector with an adjustable nozzle according to claim 6, characterized in that: The clamping plate is provided with a slot in the circumferential direction at one end close to the screw sleeve; the locking mechanism includes a mounting block with one end fixed to the screw sleeve and the other end inserted into the slot, and the mounting block and the clamping plate are respectively provided with locking holes on the corresponding sides; the clamping plate is also provided with a locking pull rod which extends into the locking holes on the mounting block and the clamping plate in turn.

8. The fuel cell ejector with an adjustable nozzle according to claim 7, characterized in that: The clamping plate is provided with a mounting shell for installing the locking rod on the side where the locking socket is provided, and the mounting shell is provided with a limit plate that can slide in the mounting shell at one end facing the clamping plate, and the locking rod passes through the side wall of the mounting shell away from the clamping plate and the limit plate in sequence, and the locking rod slides with the side wall of the mounting shell and is fixedly connected to the limit plate. The locking rod is provided with a reset spring between the limit plate and the side wall of the mounting shell away from the clamping plate, and the locking rod has a pull block for manual operation at one end away from the clamping plate.

9. The fuel cell ejector with an adjustable nozzle according to claim 8, characterized in that: The mounting shell is provided with a slide groove on the outer wall on the side away from the clamping plate, and the slide groove extends to the vicinity of the pull block. A limit block that can move along the slide groove is provided in the slide groove, and the limit block is provided with an insertion rod for supporting the pull block pulled outward when it moves to the vicinity of the pull block.

10. The fuel cell ejector with an adjustable nozzle according to claim 1, characterized in that: The ejector body is provided with a detachable sealing plate at one end for mounting the nozzle, and the sealing plate is provided with the nozzle mounting hole.

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