Ejector capable of switching nozzles

Abstract

The invention discloses an ejector capable of switching nozzles, which relates to an ejector and comprises a first gas ejection assembly, a second gas ejection assembly, a nozzle wheel disc, a rotating shaft and a limiting assembly. The first gas injection assembly comprises a first main body, and the second gas injection assembly comprises a second main body. The nozzle wheel disc is communicated between the first main body and the second main body; and a plurality of nozzles with different calibers are circumferentially arranged on the nozzle wheel disc. The rotating shaft is fixedly connected with the first main body and the second main body, and the rotating shaft is inserted into the shaft part of the nozzle wheel disc, so that the nozzle wheel disc rotates around the rotating shaft. And the limiting assembly is used for limiting and fixing the positions of the nozzle wheel disc relative to the first main body and the second main body. According to the ejector, rapid switching of the nozzles can be achieved, and the use requirements under different working conditions are met.

Description

Technical Field

[0001] The present invention relates to the technical field of ejectors, and more specifically, to an ejector with a switchable nozzle. Background Art

[0002] In the current field of clean energy, hydrogen fuel has become one of the important development directions for global energy transformation due to its high efficiency and zero emissions characteristics. However, in hydrogen fuel systems, the effective management and recycling of hydrogen pose significant technical challenges. Traditional single-nozzle ejectors have certain limitations in adapting to the wide power output range of fuel cells.

[0003] When the existing hydrogen fuel cell system uses an ejector, one caliber of ejector corresponds to one working condition. When the working condition changes, it is necessary to remove the sealing tape at the pipe connection, disconnect and remove the single-nozzle ejector from the gas pipeline, replace it with a single-nozzle ejector corresponding to the working condition, and wrap the connection with sealing tape. When operating more than three working conditions, more than three such steps will be required, which will be quite troublesome.

[0004] In summary, how to make the ejector applicable to different working conditions and reduce the cumbersome operations of frequently disassembling and replacing the ejector due to changes in working conditions is an urgent problem to be solved by those skilled in the art at present. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an ejector with a switchable nozzle, which effectively solves the problem of frequently replacing ejectors with different calibers due to changes in working conditions in hydrogen fuel systems.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] An ejector with a switchable nozzle, comprising:

[0008] A first ejecting gas assembly, the first ejecting gas assembly including a first main body;

[0009] A second ejecting gas assembly, the second ejecting gas assembly including a second main body;

[0010] A nozzle wheel disc, connected between the first main body and the second main body, and a plurality of nozzles with different calibers are circumferentially arranged on the nozzle wheel disc;

[0011] A rotating shaft, fixedly connected between the rotating shaft and both the first main body and the second main body, and the rotating shaft is inserted into the shaft portion of the nozzle wheel disc so that the nozzle wheel disc rotates around the rotating shaft;

[0012] A limiting assembly, which is used to limit and fix the position of the nozzle wheel disc relative to the first main body and the second main body.

[0013] Preferably, the rotating shaft is integrally formed with the first body and has a connecting portion.

[0014] Preferably, the connecting portion is in the structure of a connecting plate. Two ends of the connecting portion are respectively connected with the first body and the rotating shaft. One side surface of the connecting portion is attached to one side of the nozzle disk close to the first body.

[0015] Preferably, a fixing structure is arranged between the rotating shaft and the second body so that the rotating shaft and the second body are detachably arranged.

[0016] Preferably, the fixing structure includes an arc-shaped plate extending from one side of the rotating shaft towards the second body. The arc-shaped plate and the second body are detachably fixed by bolts.

[0017] Preferably, one side of the arc-shaped plate is attached to the surface of the second body. A wear-resistant pad is arranged on the second body at the connection with the arc-shaped plate.

[0018] Preferably, the limiting component includes a first limiting plate extending circumferentially outwards from the first body and a second limiting plate extending circumferentially outwards from the second body. Both the first limiting plate and the second limiting plate are detachably fixed to the outer periphery of the nozzle disk by bolts.

[0019] Preferably, a suction chamber, a mixing chamber and a diffusion chamber which are communicated with each other are sequentially arranged in the second body. The suction chamber is arranged close to the nozzle disk. A secondary flow inlet is arranged on the second body and is communicated with the suction chamber;

[0020] A primary flow inlet is arranged on one side of the first body. The primary flow inlet is communicated with the suction chamber through the nozzle.

[0021] Preferably, elastic clamping strips are arranged on one sides of the first body and the second body close to the nozzle disk. Chute grooves are arranged on outer peripheries on both sides of the nozzle disk. The elastic clamping strips are all slidably arranged in corresponding chute grooves. A plurality of clamping blocks are arranged in each chute groove. The plurality of clamping blocks are circumferentially distributed according to the positions of the nozzles.

[0022] Preferably, two elastic clamping strips are arranged on the first body and the second body. A gap is formed between the two elastic clamping strips. The clamping blocks can be placed in the gap.

[0023] The switchable nozzle ejector provided by the present invention can realize efficient switching under various working conditions. By arranging multiple nozzles of different calibers on the nozzle wheel and combining the design of the rotating shaft and the limit assembly, the user can quickly adjust the nozzle position according to actual needs, thereby adapting to the working conditions of fuel cells with different powers. This design not only simplifies the operation process, but also significantly improves the flexibility and scope of application of the equipment, providing a reliable guarantee for the stable operation of the hydrogen fuel cell system.

[0024] The further solution provided in this application can also achieve at least one of the following beneficial technical effects:

[0025] By designing the connection part as a connection plate structure, the connection strength between the rotating shaft and the first body can be effectively enhanced. At the same time, since the two ends of the connection part are respectively connected to the first body and the rotating shaft, and its surface is in contact with the nozzle wheel, not only the stability of the overall device is improved, but also the shaking of the nozzle wheel during the rotation process can be reduced, thereby ensuring the accurate positioning when the nozzle is switched;

[0026] The wear-resistant pad between the arc plate and the second body can effectively reduce the wear of the two during long-term use, extending the service life of the overall structure. At the same time, this design can also ensure the connection stability between the rotating shaft and the second body, avoid loosening problems caused by wear, and thus improve the reliability and safety of the ejector when switching between different working conditions;

[0027] By utilizing the elastic clip strip, during the process of rotating and switching the nozzle wheel, the clip block can be used to achieve appropriate blocking of each nozzle, so that during the switching process, the nozzle of the specified caliber will not be missed due to switching too quickly, thereby further improving the stability of the switching process. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0029] Figure 1 Schematic diagram of the overall structure of the ejector in this embodiment;

[0030] Figure 2 This is a schematic diagram of the explosion of the ejector in this embodiment;

[0031] Figure 3 is a cross-sectional view of the ejector in this embodiment;

[0032] Figure 4This is a schematic diagram of the structure of the elastic strip and the clamping block in this embodiment.

[0033] Figures 1 - 4 Among them, the reference numerals include:

[0034] 1. First ejector gas assembly; 11. First main body; 13. Arc plate; 15. Connecting part; 16. First limiting plate;

[0035] 2. First limiting hole; 3. Nozzle wheel disc; 4. Second limiting hole;

[0036] 5. Second ejector gas assembly; 51. Second main body; 52. Second limiting plate;

[0037] 6. Suction chamber; 7. Mixing chamber; 8. Diffusion chamber; 9. Rotating shaft; 10. Nozzle; 12. Secondary flow inlet; 14. Primary flow inlet; 17. Clamping block; 18. Chute; 19. Elastic strip. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Unless otherwise defined, the technical terms or scientific terms used in this application disclosure should have the ordinary meaning understood by those of ordinary skill in the art to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance. "Connection" or "connected" and similar terms are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to represent relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. This application embodiment discloses an ejector with a switchable nozzle.

[0040] The core of the present invention is to provide an ejector with a switchable nozzle.

[0041] Please refer to Figures 1 to 3 .

[0042] The ejector with a switchable nozzle provided by the present invention includes a first ejecting gas assembly 1, a second ejecting gas assembly 5, a nozzle disk 3, a rotating shaft 9 and a limiting assembly. The first ejecting gas assembly 1 includes a first main body 11, and the second ejecting gas assembly 5 includes a second main body 51. The nozzle disk 3 is communicated between the first main body 11 and the second main body 51, and a plurality of nozzles 10 with different diameters are circumferentially arranged on the nozzle disk 3. The rotating shaft 9 is fixedly connected to both the first main body 11 and the second main body 51, and the rotating shaft 9 is inserted into the shaft portion of the nozzle disk 3 to enable the nozzle disk 3 to rotate around the rotating shaft 9. The limiting assembly is used to limit and fix the position of the nozzle disk 3 relative to the first main body 11 and the second main body 51.

[0043] Specifically, the first main body 11 and the second main body 51 are communicated through the nozzles 10 on the nozzle disk 3. By rotating the nozzle disk 3 around the rotating shaft 9, the switching of the nozzles 10 communicated with the first main body 11 and the second main body 51 can be realized. During the process of switching the nozzles 10, the operator can select the appropriate nozzle 10 diameter according to the actual working conditions of the fuel cell system. Since a plurality of nozzles 10 with different diameters are circumferentially arranged on the nozzle disk 3, various working conditions can be flexibly responded to, and the ejector ratio can be continuously adjusted. This not only improves the applicability of the equipment, but also helps to optimize the performance and energy efficiency of the fuel cell system within the full power range. After the nozzle disk 3 rotates to the specified position, the limiting assembly can fix the nozzle disk 3 at the current position to ensure the stable and reliable communication between the nozzles 10 and the first main body 11 and the second main body 51. The limiting assembly improves the convenience of operation and the firmness of fixation, enabling the operator to easily complete the switching and fixing work of the nozzles.

[0044] In addition, the ejector with a switchable nozzle also has the advantages of simple structure and convenient maintenance. The connection between its various components is tight and stable, and faults are not likely to occur. At the same time, due to the modular design, each component can be disassembled and replaced separately, reducing the maintenance cost and time.

[0045] The above ejector with a switchable nozzle effectively enables the ejector to quickly switch the nozzle, meeting the usage requirements under different working conditions. A plurality of nozzles with different diameters are circumferentially arranged on the nozzle wheel disc, enabling the ejector to continuously adjust the entrainment ratio by switching the nozzle under different working conditions, thereby adapting to the hydrogen circulation requirements within the full power range of the fuel cell. The rotating shaft is fixedly connected to the first main body and the second main body and is inserted into the shaft portion of the nozzle wheel disc to ensure the stable rotation of the nozzle wheel disc, improving the convenience and reliability of the switching operation. The limiting component limits and fixes the position of the nozzle wheel disc to ensure the accurate position of the switched nozzle and avoid performance degradation caused by misalignment of the gas flow path. It effectively simplifies the operation process, significantly improves the flexibility and application range of the equipment, and provides a reliable guarantee for the stable operation of the hydrogen fuel cell system.

[0046] The following will introduce the ejector with a switchable nozzle provided by the present invention in more detail with reference to the accompanying drawings and specific embodiments.

[0047] In a specific embodiment, referring to Figure 3 , the rotating shaft 9 is integrally formed with the first main body 11 and has a connecting portion 15.

[0048] Specifically, the connecting portion 15 enhances the structural strength and stability between the rotating shaft 9 and the first main body 11. The connecting portion 15 may be a specific shape or structure that allows the rotating shaft 9 to be firmly connected to the first main body 11. By means of integral molding, there is no additional interface or gap between the rotating shaft 9 and the first main body 11, thereby reducing the potential leakage risk and improving the sealing performance of the entire ejector.

[0049] In addition, it helps to simplify the manufacturing process and reduce the production cost. Since the assembly steps between components are reduced, the production efficiency will also be correspondingly improved.

[0050] During the rotation of the nozzle wheel disc 3 around the rotating shaft 9, the integrally formed rotating shaft 9 and the first main body 11 can ensure the smoothness and accuracy of the rotation. This enables the operator to easily achieve precise positioning when switching the nozzle, thereby improving the convenience and reliability of the operation.

[0051] Furthermore, the connecting portion 15 is a connecting plate structure. The two ends of the connecting portion 15 are respectively connected to the first main body 11 and the rotating shaft 9, and one side surface of the connecting portion 15 is attached to the side of the nozzle wheel disc 3 close to the first main body 11.

[0052] Specifically, the two ends of the connection part 15 are closely connected to the first body 11 and the rotating shaft 9, respectively, to form an integral structure, thereby improving the anti-torsion capability and load-bearing capacity of the rotating shaft 9. One side surface of the connection part 15 is closely fitted to the side of the nozzle wheel disc 3 close to the first body 11, which not only helps to ensure the stability of the nozzle wheel disc 3 during rotation, but also prevents gas from leaking out of the gap between the nozzle wheel disc 3 and the first body 11, thereby improving the sealing performance of the ejector.

[0053] It should be noted that the connection portion 15 of the connection plate structure also has good rigidity and strength, can effectively resist external pressure and vibration, and protect the rotating shaft 9 and the nozzle wheel 3 from damage. In practical applications, the connection plate structure of the connection portion 15 allows operators to more conveniently install and remove the nozzle wheel 3, thereby simplifying maintenance work. At the same time, it also helps to reduce system downtime caused by loose or damaged nozzle wheel 3, and improves the operating efficiency and availability of the equipment.

[0054] Based on any of the above embodiments, Figure 3 A fixing structure is provided between the rotating shaft 9 and the second body 51 so that the rotating shaft 9 and the second body 51 can be detachably arranged.

[0055] Specifically, the fixing structure may include threaded connectors, snap-fit ​​devices, or the combination of bolts and nuts, etc., in order to ensure the stability and reliability of the overall connection of the device during operation, and to facilitate subsequent maintenance and replacement. The fixing structure allows the operator to easily separate the rotating shaft 9 from the second body 51 when necessary, so as to inspect, clean or replace the internal components of the ejector. For example, when the nozzle wheel 3 is worn or needs to be upgraded, the operator can quickly separate the rotating shaft 9 from the second body 51, remove the nozzle wheel 3 from the rotating shaft 9, and then replace the nozzle wheel 3, which greatly improves the maintenance efficiency. In addition, the detachable design also enhances the flexibility and scalability of the ejector. The operator can select nozzle wheels 3 and rotating shafts 9 of different specifications or types for assembly according to actual needs to adapt to a wider range of application scenarios. The detachable setting between the rotating shaft 9 and the second body 51 realized by the fixing structure not only simplifies the maintenance process of the ejector and improves the maintenance efficiency, but also enhances the flexibility and scalability of the equipment, and provides solid technical support for the stable operation and energy efficiency improvement of the hydrogen fuel cell system.

[0056] It should be noted that, although the rotating shaft 9 and the second body 51 are detachable, the design of the fixed structure must ensure the sealing and strength of the connection to prevent gas leakage or structural failure. Therefore, the quality must be strictly controlled during the material selection, processing and assembly process to ensure the overall performance of the ejector.

[0057] Furthermore, the fixing structure includes an arc-shaped plate 13 extending from one side of the rotating shaft 9 towards the second main body 51, and the arc-shaped plate 13 is detachably fixed to the second main body 51 by bolts.

[0058] Specifically, the arc-shaped plate 13 not only increases the contact area with the second main body 51, improving the stability and firmness of the connection, but also its arc shape can better adapt to the rotation characteristics of the rotating shaft 9, reducing friction and resistance during rotation. Threaded holes for bolt threaded connection are provided on both the arc-shaped plate 13 and the second main body 51. The arc-shaped plate 13 and the second main body 51 have good sealing performance. It can ensure that the contact surfaces between the arc-shaped plate 13 and the second main body 51 are closely fitted, effectively preventing gas leakage and ensuring the normal operation of the ejector. This not only enhances the stability and firmness of the ejector but also improves the convenience of maintenance and replacement, providing strong support for the stable operation and energy efficiency improvement of the hydrogen fuel cell system.

[0059] Optionally, one side of the arc-shaped plate 13 is fitted to the surface of the second main body 51, and a wear-resistant pad is provided on the second main body 51 at the connection with the arc-shaped plate 13.

[0060] Specifically, one side of the arc-shaped plate 13 is closely fitted to the surface of the second main body 51, which not only helps to enhance the stability of the connection but also ensures that the gas flow inside the ejector is not disturbed, thereby improving the overall performance of the ejector. The wear-resistant pad is usually made of high-performance materials with wear resistance and corrosion resistance, such as polytetrafluoroethylene, ceramics, etc. These materials have excellent tribological properties and chemical stability, and can effectively resist the wear of the surface of the second main body 51 by the rotating shaft 9 during rotation, extending the service life of the equipment. The setting of the wear-resistant pad also plays a good sealing role. When the arc-shaped plate 13 is fitted to the second main body 51, the wear-resistant pad can fill the tiny gaps between the two to prevent gas leakage and ensure the sealing performance of the ejector.

[0061] Based on any of the above embodiments, referring to Figure 3 , the limiting component includes a first limiting plate 16 extending circumferentially outward from the first main body 11 and a second limiting plate 52 extending circumferentially outward from the second main body 51. Both the first limiting plate 16 and the second limiting plate 52 are detachably fixed to the outer periphery of the nozzle wheel disc 3 by bolts.

[0062] Specifically, the limiting assembly adopts a design of a first limiting plate 16 extending outwardly from the first body 11 and a second limiting plate 52 extending outwardly from the second body 51. The two limiting plates are respectively detachably fixed to the outer periphery of the nozzle wheel disc 3 by bolts, thereby effectively limiting the relative position of the nozzle wheel disc 3 between the first body 11 and the second body 51. The provision of the first limiting plate 16 and the second limiting plate 52 not only enhances the stability and rigidity of the overall structure of the ejector, but also ensures the accuracy and reliability of the nozzle wheel disc 3 during the rotation process. Through the tightening action of the bolts, the limiting plate can fit tightly on the outer periphery of the nozzle wheel disc 3 to prevent it from loosening or shifting during operation.

[0063] At the same time, this detachable and fixed design also simplifies the maintenance and replacement of the ejector. When the nozzle wheel 3 needs to be cleaned, repaired or replaced, the operator can easily remove the bolts on the limit plate and take the nozzle wheel 3 out from between the first body 11 and the second body 51. After the maintenance or replacement is completed, the nozzle wheel 3 is reinstalled back to its original position and the limit plate is fixed with bolts.

[0064] In addition, according to different working conditions or system configurations, operators can choose different specifications or quantities of limit plates for assembly to adapt to a wider range of application scenarios. For example, when more precise nozzle switching control is required, the number of limit plates can be increased or their positions can be adjusted to achieve more precise limiting and fixing effects.

[0065] In a specific embodiment provided in the present application, a suction chamber 6, a mixing chamber 7 and a diffusion chamber 8 which are interconnected are sequentially opened in the second main body 51, the suction chamber 6 is arranged close to the nozzle wheel 3, and a secondary flow inlet 12 is arranged on the second main body 51, and the secondary flow inlet 12 is connected to the suction chamber 6; a primary flow inlet 14 is arranged on one side of the first main body 11, and the primary flow inlet 14 is connected to the suction chamber 6 through the nozzle 10.

[0066] Specifically, the primary flow gas in the system is a gas with a high hydrogen content that enters the switchable nozzle ejector. After passing through the nozzle 10 through the primary flow inlet 14, the primary flow gas speed rises rapidly, forming a negative pressure in the suction chamber 6. The secondary flow gas in the system is the exhaust gas discharged from the system, and the exhaust gas contains a small amount of hydrogen that does not participate in the reaction. The secondary flow gas is sucked in through the secondary flow inlet 12 due to the negative pressure in the suction chamber 6. After the injection of the primary flow gas, the secondary flow gas and the primary flow gas form a mixed gas in the mixing chamber 7. The speed and pressure reach the fuel cell standard and enter the fuel cell reaction. Finally, the mixed gas enters the diffusion chamber 8, gradually decelerates and increases the pressure in the diffusion chamber 8, and finally sprays out from the outlet of the ejector to provide the required reaction gas for the hydrogen fuel cell system.

[0067] Based on any of the above embodiments, with reference to Figure 4 On one side of the first main body 11 and the second main body 51 close to the nozzle wheel disc 3, elastic clamping strips 19 are provided. On the outer circumferences of both sides of the nozzle wheel disc 3, sliding grooves 18 are provided. The elastic clamping strips 19 are all slidably arranged in the corresponding sliding grooves 18. A plurality of clamping blocks 17 are arranged in each sliding groove 18, and the plurality of clamping blocks 17 are circumferentially distributed according to the positions of the nozzles 10.

[0068] Specifically, an annular sliding groove 18 is formed in the outer circumference of the nozzle wheel disc 3. Elastic clamping strips 19 are provided on one side of the first main body 11 and the second main body 51 close to the nozzle wheel disc 3, and the elastic clamping strips 19 are slidably arranged in the above-mentioned sliding groove 18. A plurality of clamping blocks 17 cooperating with the elastic clamping strips 19 are arranged in the sliding groove 18. The number of the clamping blocks 17 is set according to the number of the nozzles 10. Both ends of each clamping block 17 abut against the two inner side walls of the sliding groove 18, so as to block the sliding groove 18. The elastic clamping strips 19 are fixedly arranged at the top of the whole device. During the rotation of the nozzle wheel disc 3, the elastic clamping strips 19 are passively slid relatively along the sliding groove 18. When the elastic clamping strip 19 comes into contact with any clamping block 17, it proves that the nozzle wheel disc 3 rotates to a new nozzle 10. According to the requirements, it is selected whether to continue rotating to replace a new nozzle 10 or to keep this nozzle 10. If it is necessary to continue replacing the nozzle 10, the nozzle wheel disc 3 is rotated continuously. The clamping block 17 will bend the elastic clamping strip 19, and after the clamping block 17 passes, the elastic clamping strip 19 will reset by means of elasticity, so as to wait for the next clamping block 17 to rotate over. In this way, the gear setting of the ejector is realized. The ejector can be quickly and accurately adjusted to the best working state according to different working conditions. In practical applications, this flexibility is particularly important because the working conditions of the hydrogen fuel cell system may fluctuate with the vehicle running state, ambient temperature or load changes. By simply rotating the nozzle wheel disc 3, the operator can quickly select the nozzle 10 most suitable for the current working condition, so as to optimize the performance of the ejector, improve the hydrogen injection efficiency and mixing uniformity. The cooperation between the elastic clamping strip 19 and the clamping block 17 not only reduces mechanical wear, but also reduces the failure rate that may be caused by frequent nozzle replacement. At the same time, due to the good elasticity and reset ability of the elastic clamping strip 19, even after long-term use, it can maintain its original performance and accuracy, ensuring that the ejector can always work stably and accurately.

[0069] Furthermore, two elastic clamping strips 19 are provided on both the first main body 11 and the second main body 51. There is a gap between the two elastic clamping strips 19, and the clamping blocks 17 can be placed in the gap.

[0070] Specifically, two elastic clamping strips 19 are provided. When the clamping block 17 reaches the first elastic clamping strip 19, the first elastic clamping strip 19 can be bent and passed through, and then placed in the gap between the two elastic clamping strips 19. Thus, when fixing the nozzle wheel disc 3, the two elastic clamping strips 19 can preferentially limit the nozzle wheel disc 3 to a certain extent, avoiding unnecessary rotation of the nozzle wheel disc 3 during the fixing process.

[0071] In this specification, each embodiment is described in a progressive manner. The key point of each embodiment is to illustrate the differences from other embodiments. For the same or similar parts among the embodiments, reference can be made to each other.

[0072] The above has introduced in detail a kind of ejector with a switchable nozzle provided by the present invention. Specific examples are used herein to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the present invention.

Claims

1. An ejector with a switchable nozzle, characterized in that: include: A first induced gas component (1), the first induced gas component (1) comprising a first body (11); A second induced gas component (5), the second induced gas component (5) comprising a second body (51); A nozzle wheel (3) connected between the first body (11) and the second body (51), wherein a plurality of nozzles (10) of different calibers are circumferentially arranged on the nozzle wheel (3); a rotating shaft (9), the rotating shaft (9) being fixedly connected to the first body (11) and the second body (51), the rotating shaft (9) being inserted into the shaft portion of the nozzle wheel (3) so that the nozzle wheel (3) rotates around the rotating shaft (9); A limiting assembly, the limiting assembly being used to limit and fix the position of the nozzle wheel (3) relative to the first body (11) and the second body (51).

2. The switchable nozzle ejector according to claim 1, characterized in that: The rotating shaft (9) and the first main body (11) are integrally formed and have a connecting portion (15).

3. The switchable nozzle ejector according to claim 2, characterized in that: The connecting portion (15) is a connecting plate structure, and the two ends of the connecting portion (15) are respectively connected to the first main body (11) and the rotating shaft (9), and a surface of one side of the connecting portion (15) is in contact with a side of the nozzle wheel (3) close to the first main body (11).

4. The switchable nozzle ejector according to claim 1, characterized in that: A fixing structure is provided between the rotating shaft (9) and the second main body (51), so that the rotating shaft (9) and the second main body (51) can be detachably arranged.

5. The switchable nozzle ejector according to claim 4, characterized in that: The fixing structure comprises an arc-shaped plate (13) extending from one side of the rotating shaft (9) towards the second main body (51), and the arc-shaped plate (13) and the second main body (51) are detachably fixed by bolts.

6. The switchable nozzle ejector according to claim 5, characterized in that: One side of the arc-shaped plate (13) is in contact with the surface of the second main body (51), and a wear-resistant pad is provided on the second main body (51) at the connection with the arc-shaped plate (13).

7. The switchable nozzle ejector according to claim 1, characterized in that: The limiting assembly comprises a first limiting plate (16) extending outwardly from the first main body (11) in the circumferential direction, and a second limiting plate (52) extending outwardly from the second main body (51) in the circumferential direction, wherein the first limiting plate (16) and the second limiting plate (52) are both detachably fixed to the outer circumference of the nozzle wheel (3) by bolts.

8. An ejector with a switchable nozzle according to any one of claims 1 to 7, characterized in that: The second body (51) is provided with a suction chamber (6), a mixing chamber (7) and a diffusion chamber (8) which are interconnected in sequence, the suction chamber (6) being arranged close to the nozzle wheel (3), and the second body (51) is provided with a secondary flow inlet (12), the secondary flow inlet (12) being in communication with the suction chamber (6); A primary inlet (14) is provided on one side of the first body (11), and the primary inlet (14) is connected to the suction chamber (6) through the nozzle (10).

9. An ejector with a switchable nozzle according to any one of claims 1 to 7, characterized in that: The first body (11) and the second body (51) are each provided with an elastic clip (19) on one side close to the nozzle wheel (3), and slide grooves (18) are provided on the outer periphery of both sides of the nozzle wheel (3). The elastic clips (19) are slidably arranged in the corresponding slide grooves (18), and a plurality of clip blocks (17) are arranged in each slide groove (18). The plurality of clip blocks (17) are circumferentially distributed according to the position of the nozzle (10).

10. The switchable nozzle ejector according to claim 9, characterized in that: Two elastic clips (19) are provided on each of the first main body (11) and the second main body (51), and a gap is provided between the two elastic clips (19), and the clip block (17) can be placed in the gap.

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