Steam injector with automatic regulation of needle sticking

Abstract

The application discloses a steam ejector capable of automatically adjusting needle sticking, and belongs to the field of thermal power generation. The steam ejector capable of automatically adjusting needle sticking comprises a needle actuator, a needle shaft connected with the needle actuator, a needle shaft sleeve sleeved on the needle shaft, and a shell, wherein the needle shaft and the needle shaft sleeve are located in the shell, the needle shaft sleeve is surrounded by a plurality of arc-shaped plates and is annular, and each arc-shaped plate is provided with a driving assembly capable of driving the arc-shaped plate to move away from the needle shaft on the outer side wall of the arc-shaped plate. The steam ejector capable of automatically adjusting needle sticking can adjust the gap between the inner wall of the needle shaft sleeve and the needle shaft in real time according to the sticking condition.

Description

A steam injector that automatically adjusts the nozzle jamming Technical Field

[0001] This application relates to the field of thermal power generation, and in particular to a steam ejector that automatically adjusts the nozzle jamming. Background Technology

[0002] A steam ejector (also known as a steam booster) mainly consists of a nozzle, a nozzle needle, a nozzle needle actuator, a mixing chamber, a motive steam inlet, a waste steam inlet, and a vent. High-pressure motive steam converts pressure energy into kinetic energy through the nozzle, forming a supersonic jet. The low-pressure waste steam being drawn in is then injected into the suction chamber due to the extremely strong shearing action between it and the high-speed ejected motive steam.

[0003] The turbulent diffusion effect of the jet boundary layer causes an exchange of mass, momentum, and energy between the two fluids. As a result, the velocity of the motive steam continuously decreases, while the velocity of the pumped low-pressure exhaust steam continuously increases, gradually converging at a certain cross-section of the mixing section, thus forming a single, homogeneous mixed fluid. In the diffusion section, kinetic energy is converted into pressure energy, and the mixed fluid decelerates and pressurizes to a pressure higher than that of the low-pressure exhaust steam on the suction side before being discharged.

[0004] Currently, some large steam ejectors used in waste heat treatment systems suffer from varying degrees of jamming between the nozzle shaft and the nozzle bushing. This means that after the nozzle shaft deforms, the frictional force between the nozzle bushing and the nozzle shaft exceeds the linear thrust torque of the actuator. Once jamming occurs, the steam ejector cannot adjust the nozzle opening. On the one hand, to maintain stable nozzle stroke during adjustment, the clearance between the nozzle bushing and the nozzle shaft should not be too large. On the other hand, because the heating season involves continuous operation, nozzle failures in the steam ejector can only be addressed after the heating season ends. Therefore, resolving the jamming problem between the nozzle shaft and the nozzle bushing in operating steam ejectors is urgently needed. Summary of the Invention

[0005] To solve the problem of jamming between the nozzle shaft and the nozzle bushing of a steam ejector during operation, this application provides a steam ejector that automatically adjusts the nozzle jamming.

[0006] This application provides a steam ejector that automatically adjusts for nozzle jamming, employing the following technical solution:

[0007] An automatic adjustment steam ejector for needle jamming includes: a needle actuator, a needle shaft connected to the needle actuator, a housing, and a needle bushing sleeve fitted on the needle shaft. The needle shaft and the needle bushing sleeve are located inside the housing. The needle bushing sleeve is formed by multiple arc-shaped plates in a ring shape. Each arc-shaped plate is provided with a drive component that can drive the arc-shaped plate to move away from the needle shaft.

[0008] By employing the above technical solution, the needle actuator pushes the needle shaft back and forth to adjust the nozzle opening. When the needle actuator has difficulty pushing the needle shaft, i.e., when jamming occurs between the needle shaft and the needle bushing, the drive assembly moves each arc plate away from the needle shaft to adjust the distance between the needle bushing and the needle shaft. By setting each arc plate independently, a needle bushing structure can be formed in which each arc plate moves separately, changing the size of the area enclosed by all the arc plates. This not only allows for real-time adjustment of the gap between the inner wall of the needle bushing and the needle shaft according to the jamming situation, but also provides better support for the needle shaft from the needle bushing.

[0009] Optionally, the driving component is a first driving component, and at least two first driving components are arranged along the axial direction on each arc plate;

[0010] The first drive assembly includes a first drive member fixed to the outer wall of the housing, a lead screw fixedly connected to the output shaft of the first drive member, a first elastic member sleeved on the lead screw, and a vertical sleeve fixed to the outer wall of each arc plate. One end of the first elastic member and one end of the vertical sleeve opposite to the arc plate are fixed, and the other end of the first elastic member is disposed on the inner wall of the housing. The lead screw extends into the vertical sleeve and the two are threadedly connected.

[0011] By adopting the above technical solution, when jamming occurs between the nozzle bushing and the nozzle shaft, the first drive component on each arc plate rotates, causing the lead screw to rotate. Since two sets of first drive components are provided, one set can act as a limit switch, ensuring that the lead screw rotation only moves the vertical sleeve without rotating. The movement of the vertical sleeve causes the arc plate to move away from the nozzle shaft, thus adjusting the gap between the nozzle shaft and the nozzle bushing.

[0012] Optionally, the number of arc-shaped plates is even, and includes odd-arc plates and even-arc plates arranged alternately;

[0013] The drive assembly includes a second drive assembly and a retractable support assembly. The second drive assembly is disposed on an odd-arc plate, and the support assembly is disposed on an even-arc plate. At least two second drive assemblies are disposed on the odd-arc plate along the axis.

[0014] When the odd-arc plate moves away from the nozzle axis, it can drive the adjacent even-arc plate away from the nozzle axis.

[0015] By adopting the above technical solution and setting an even number of arc-shaped plates, when the odd-shaped arc-shaped plates move away from the nozzle axis, the even-shaped arc-shaped plates located between the two odd-shaped arc-shaped plates can also move away from the nozzle axis under the push of the odd-shaped arc-shaped plates on both sides. This achieves a situation where half of the arc-shaped plates have driving force and the other half have support, thus moving all the arc-shaped plates away from the nozzle axis. Ultimately, the gap between the nozzle bushing formed by the arc-shaped plates and the nozzle axis can be adjusted, increasing the distance between the entire nozzle bushing and the nozzle axis, and solving the problem of jamming between the nozzle axis and the nozzle bushing.

[0016] Optionally, the odd-arc plate forms a first wedge-shaped surface on the side facing the even-arc plate, and the even-arc plate forms a second wedge-shaped surface on the side facing the odd-arc plate. The first wedge-shaped surface is used to drive the second wedge-shaped surface away from the nozzle axis.

[0017] By adopting the above technical solution, the second wedge-shaped surfaces at both ends of the even arc plate located between the two odd arc plates can be pushed by the first wedge-shaped surfaces that abut against them. Thus, while the two odd arc plates move away from the nozzle axis, under the action of the two first wedge-shaped surfaces, one even arc plate can also be driven to move away from the nozzle axis.

[0018] Optionally, a first groove is formed on the first wedge-shaped surface, a first hinge rod is hinged in the first groove, and the first hinge rod is also hinged on the second wedge-shaped surface.

[0019] By adopting the above technical solution, when the odd arc plate moves away from the nozzle axis, one end of the first hinge rod located in the first groove of the first wedge surface of the odd arc plate rotates. At the same time as the first hinge rod rotates, it drives the second wedge surface of the even arc plate to move away from the nozzle axis, thereby increasing the distance between the even arc plate and the nozzle axis.

[0020] Optionally, a second groove is formed on the first wedge-shaped surface, and a third groove is formed on the second wedge-shaped surface. A second hinge rod is hinged in the second groove, and one end of the second hinge rod is located in the third groove and presses against the groove wall of the third groove.

[0021] By adopting the above technical solution, when the odd arc plate moves away from the nozzle axis, one end of the second hinge rod located in the second groove of the first wedge surface rotates. At the same time as the second hinge rod rotates, one end of the second hinge rod is lifted, and the other end of the second hinge rod rotates and drives the groove wall of the third groove, thereby driving the even arc plate to move away from the nozzle axis, thereby increasing the distance between the even arc plate and the nozzle axis.

[0022] Optionally, the support assembly includes a first sleeve fixedly connected to the inner wall of the outer shell, a second sleeve slidably sleeved on the first sleeve, and a second elastic member with one end disposed inside the first sleeve. The other end of the second elastic member is fixed to the even arc plate, and one end of the second sleeve is fixed to the even arc plate.

[0023] By adopting the above technical solution, when the even-arc plate moves away from the nozzle axis under the drive of the odd-arc plate, the second elastic element is gradually compressed, the second sleeve slides on the first sleeve, and the second sleeve gradually approaches the inner wall of the outer shell, thereby enabling the support assembly to support the even-arc plate in real time.

[0024] Optionally, the needle actuator is electrically connected to the control system, and the control system is electrically connected to the first drive component.

[0025] By adopting the above technical solution, when the nozzle shaft and nozzle bushing jam, the nozzle actuator feeds back an over-torque signal to the control system. The control system controls the first driving component to rotate, adjusting the distance between the arc plate and the nozzle shaft. The adjustment displacement can be preset within the control system for each instance; if jamming occurs again, the next adjustment will be performed. Each adjustment displacement can be a fine-tuning value, thereby reducing the likelihood of jamming between the nozzle shaft and nozzle bushing.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] When the nozzle shaft and nozzle bushing jam, the nozzle actuator has difficulty pushing the nozzle shaft and sends an over-torque signal back to the control system. The control system controls the first drive component to rotate, adjusting the distance between the arc plate and the nozzle shaft. The adjustment displacement can be preset in the control system each time, and the next adjustment will be performed when jamming occurs again. Each adjustment displacement can be a fine-tuning value, thereby automatically adjusting the distance between the nozzle shaft and nozzle bushing and reducing the occurrence of jamming. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the overall structure of a steam ejector that automatically adjusts the nozzle jamming according to this application;

[0029] Figure 2 is an enlarged view of point A in Figure 1;

[0030] Figure 3 is a schematic diagram illustrating the structure of automatically adjusting the distance between the nozzle shaft and the nozzle shaft sleeve in Embodiments 2 and 3 of this application;

[0031] Figure 4 is a cross-sectional schematic diagram illustrating the automatic adjustment of the nozzle shaft and nozzle bushing distance in Embodiments 2 and 3 of this application;

[0032] Figure 5 is a schematic diagram illustrating the structure of the automatic adjustment of the nozzle shaft and nozzle bushing distance according to Embodiment 4 of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Needle actuator; 2. Needle shaft; 3. Housing; 4. Needle bushing; 5. First hinge rod; 6. Second hinge rod; 7. Control system;

[0035] 10. First drive assembly; 11. First drive component; 12. Lead screw; 13. First elastic component; 14. Vertical sleeve; 20. Second drive assembly; 30. Support assembly; 31. First sleeve; 32. Second sleeve; 33. Second elastic component; 41. Arc plate; 411. Odd arc plate; 412. Even arc plate; 4111. First groove; 4112. Second groove; 4121. Third groove;

[0036] 101. Nozzle; 201. Spray needle; 301. Exhaust steam inlet; 302. Power steam inlet; 303. Exhaust port. Detailed Implementation

[0037] The present application will be further described in detail below with reference to Figures 1-5.

[0038] This application discloses a steam injector that automatically adjusts the nozzle jamming.

[0039] Example 1

[0040] Referring to Figures 1 and 2, a steam ejector with automatic adjustment of nozzle jamming includes a housing 3 and a nozzle shaft 2 disposed within the housing 3. One end of the nozzle shaft 2 is provided with a conical nozzle 201, and the other end of the nozzle shaft 2 extends out of the housing 3 and is rotatably connected to a nozzle actuator 1. A limit switch can be provided within the housing 3 to restrict the nozzle shaft 2, thereby ensuring that when the nozzle actuator 1 rotates, the nozzle shaft 2 can only move back and forth reciprocally and cannot rotate.

[0041] A nozzle 101 is also provided inside the outer casing 3, and the nozzle 101 is sleeved on the nozzle shaft 2. The end of the nozzle 201 facing the outlet of the nozzle 101 is a pointed tip, and the end of the nozzle 101 facing the pointed tip of the nozzle 201 has a tapered and expanded structure. The nozzle 201 can move back and forth from the contracted part to the expanded part. By adjusting the depth of the nozzle 201 into the expanded part of the nozzle 101, the opening of the nozzle 101 can be adjusted, which is to adjust the gap between the nozzle 201 and the inner wall of the expanded part, thereby adjusting the amount of gas flowing out.

[0042] The outer casing 3 has a waste steam inlet 301 in the middle, a power steam inlet 302 at the end of the outer casing 3 near the needle actuator 1, and a funnel-shaped exhaust port 303 at the end of the outer casing 3 away from the needle actuator 1, which is used to discharge the gas after the waste steam and power steam are mixed.

[0043] Inside the outer casing 3, there is also a nozzle bushing 4 that is fitted onto the nozzle shaft 2. Under normal circumstances, there is a small gap between the nozzle shaft 2 and the nozzle bushing 4. The nozzle bushing 4 is used to support the nozzle shaft 2.

[0044] The nozzle bushing 4 is formed by multiple arc-shaped plates 41 in a ring, with the nozzle shaft 2 located inside the ring. The figure illustrates the case where there are two arc-shaped plates 41. Each of the outer walls of the two arc-shaped plates 41 is provided with a drive assembly capable of driving the arc-shaped plates 41 to move away from the nozzle shaft 2.

[0045] The driving component is a first driving component 10. Each arc plate 41 is provided with multiple first driving components 10 along the axial direction. In this embodiment, each arc plate 41 has two driving components 10.

[0046] Each first drive assembly 10 includes a first drive member 11 fixed to the outer wall of the housing 3, and the first drive member 11 is a motor. The output shaft of the first drive member 11 extends into the housing 3. A labyrinth seal can be used between the output shaft of the first drive member 11 and the housing 3, that is, grooves are provided at intervals on the output shaft, and protrusions are provided at intervals on the housing 3, with the protrusions located in the grooves, thereby reducing the possibility of gas leakage from the connection between the first drive member 11 and the housing 3. In addition, a honeycomb seal or a soft seal can also be used between the output shaft of the first drive member 11 and the housing 3; any structure that can improve the sealing performance of both can be used.

[0047] A lead screw 12 is fixedly connected to the output shaft of the first drive component 11. A first elastic element 13 is sleeved on the lead screw 12. A vertical sleeve 14 is fixed to the outer wall of the arc plate 41. One end of the first elastic element 13 and the end of the vertical sleeve 14 away from the nozzle bushing 4 are fixed, and the other end of the first elastic element 13 is fixedly connected to the inner wall of the outer casing 3. The lead screw 12 extends into the vertical sleeve 14 and the two are threaded together. The first elastic element 13 is a spring.

[0048] The needle actuator 1 is electrically connected to the control system 7, and the control system 7 is electrically connected to the first drive component 11. When the needle shaft 2 and the needle bushing 4 become jammed, the needle actuator 1 sends an over-torque signal back to the control system 7, which then controls the first drive component 11 to rotate. The first drive component 11 drives the lead screw 12 to rotate. Since two sets of first drive components 10 are provided, one set can act as a limit, allowing the two vertical sleeves 14 to move but not rotate. The rotation of the lead screw 12 causes the vertical sleeves 14 to move towards the first drive component 11, which in turn causes each arc plate 41 to move away from the needle shaft 2.

[0049] The first elastic element 13 can support the nozzle bushing 4. Even when the screw 12 thread fails, it can still provide effective support, thus improving reliability.

[0050] Alternatively, a pressure sensor can be installed on the arc plate 41. When the nozzle shaft 2 and the arc plate 41 come into contact, the pressure sensor sends an electrical signal to the control system 7, and the control system 7 controls the first driving component 11 to rotate.

[0051] The working principle of the steam ejector with automatic adjustment of nozzle jamming according to this application is as follows: When the nozzle shaft 2 and the nozzle bushing 4 jam, the nozzle actuator 1 has difficulty pushing the nozzle shaft 2, and the nozzle actuator 1 feeds back the over-torque signal to the control system 7. The control system 7 controls the first drive component 11 to rotate, adjusting the distance between the arc plate 41 and the nozzle shaft 2. The adjustment displacement can be preset in the control system 7 each time, and the next adjustment will be performed when jamming occurs again. Each adjustment displacement can be a fine adjustment value, thereby reducing the jamming situation between the nozzle shaft 2 and the nozzle bushing 4, and also allowing the nozzle bushing 4 to continue to support the nozzle shaft 2.

[0052] Example 2

[0053] Referring to Figures 3 and 4, the difference between Embodiment 2 and Embodiment 1 is that the driving component in Embodiment 2 is different from that in Embodiment 1. Additionally, the number of arc-shaped plates 41 in Embodiment 2 is even, including alternately arranged odd-arc plates 411 and even-arc plates 412.

[0054] The drive assembly includes a second drive assembly 20 and a retractable support assembly 30. The second drive assembly 20 is disposed on the odd arc plate 411, and the support assembly 30 is disposed on the even arc plate 412. At least two second drive assemblies 20 are disposed along the axis on the odd arc plate 411, and one or more support assemblies 30 may be disposed.

[0055] When the odd arc plate 411 moves away from the nozzle axis 2, it can drive the even arc plate 412 adjacent to the odd arc plate 411 away from the nozzle axis 2.

[0056] The two ends of the odd arc plate 411 form a first wedge surface, and the two ends of the even arc plate 412 form a second wedge surface. When the first wedge surface moves away from the nozzle axis 2, it can push the second wedge surface, thereby enabling the even arc plate 412 to also move away from the nozzle axis 2.

[0057] The structure and configuration of the second driving component 20 in this embodiment are the same as those of the first driving component 10 in Embodiment 1. The only difference is that the second driving component 20 in this embodiment is mounted on the odd arc plate 411, which will not be described in detail here.

[0058] The support assembly 30 includes a first sleeve 31 fixedly connected to the inner wall of the outer casing 3, a second sleeve 32 slidably sleeved on the first sleeve 31, and a second elastic element 33 with one end fixed to the inner bottom wall of the first sleeve 31. The other end of the second elastic element 33 is fixed to the even-arc plate 412, and one end of the second sleeve 32 is fixed to the odd-arc plate 411. The second elastic element 33 is a spring.

[0059] In this embodiment, there are two odd-arc plates 411 and two even-arc plates 412. When the nozzle shaft 2 and the nozzle bushing 4 become jammed, the nozzle actuator 1 has difficulty pushing the nozzle shaft 2, and the nozzle actuator 1 feeds back the over-torque signal to the control system 7. When the control system 7 controls the second drive component 20 to operate, it will drive the odd-arc plate 411 away from the nozzle shaft 2. The running distance of the odd-arc plate 411 can be a preset distance within the control system 7, as can be referred to in Embodiment 1.

[0060] The second wedge-shaped surfaces at both ends of the even-arc plate 412, located between the two odd-arc plates 411, move away from the nozzle shaft 2 under the drive of the two first wedge-shaped surfaces. At this time, the second elastic element 33 is gradually compressed. This enables fine adjustment of the distance between the nozzle shaft 2 and the nozzle bushing 4, allowing the nozzle bushing 4 to continue supporting the nozzle shaft 2 while maintaining a slight gap between them, reducing the possibility of jamming between the nozzle shaft 2 and the nozzle bushing 4.

[0061] Compared to Embodiment 1, Embodiment 2 can install drive components on the spaced arc plates 41, which can make all arc plates 41 move away from the nozzle axis 2, thus reducing the amount of drive components used.

[0062] Example 3

[0063] Referring to Figures 3 and 4, the difference between Embodiment 3 and Embodiment 2 is that a first groove 4111 is formed on the first wedge-shaped surface of the odd-arc plate 411, and a first hinge rod 5 is hinged within the first groove 4111. The first hinge rod 5 is also hinged to the second wedge-shaped surface of the even-arc plate 412. There can be one or more first hinge rods 5 within the first groove 4111. When there are multiple first hinge rods 5, they are all hinged to the even-arc plate 412.

[0064] When the control system 7 controls the second drive assembly 20 to operate, it drives the odd arc plate 411 away from the nozzle shaft 2. One end of the first hinge rod 5 located in the first groove 4111 of the first wedge surface rotates. While the first hinge rod 5 rotates, it drives the second wedge surface of the even arc plate 412 to move away from the nozzle shaft 2, thereby increasing the distance between the even arc plate 412 and the nozzle shaft 2.

[0065] Compared to Embodiment 2, Embodiment 3 can adjust for more jamming situations, with a larger overall adjustment distance. Moreover, the first hinge rods 5 located at both ends of the second wedge surface work in conjunction with the drive of the wedge surface, making the drive more reliable and stable.

[0066] Example 4

[0067] Referring to Figure 5, the difference between Embodiment 4 and Embodiment 2 is that a second groove 4112 is formed on the first wedge-shaped surface of the odd-arc plate 411, and a third groove 4121 is formed on the second wedge-shaped surface of the even-arc plate 412. A second hinge rod 6 is hinged within the second groove 4112, with one end of the second hinge rod 6 located within the third groove 4121 and pressing against the groove wall of the third groove 4121. There can be one or more second hinge rods 6 within the second groove 4112; when there are multiple second hinge rods 6, they all press against the groove wall of the third groove 4121.

[0068] When the control system 7 controls the second drive assembly 20 to operate, it drives the odd-arc plate 411 away from the nozzle shaft 2. One end of the second hinge rod 6 located in the second groove 4112 of the first wedge surface rotates, and at the same time as the second hinge rod 6 rotates, one end of the second hinge rod 6 is lifted. The other end of the second hinge rod 6 rotates and pushes the groove wall of the third groove 4121, thereby driving the even-arc plate 412 to move away from the nozzle shaft 2, thereby increasing the distance between the even-arc plate 412 and the nozzle shaft 2.

[0069] Compared to Example 3, this example uses a lever structure, which makes the structural design simpler.

[0070] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A steam ejector that automatically adjusts the nozzle jamming, comprising: The device comprises a needle actuator (1), a needle shaft (2) connected to the needle actuator (1), a housing (3), and a needle bushing (4) sleeved on the needle shaft (2). The needle shaft (2) and the needle bushing (4) are located inside the housing (3). The needle bushing (4) is characterized by being formed by multiple arc-shaped plates (41) arranged in a ring shape. Each arc-shaped plate (41) is provided with a driving component capable of driving the arc-shaped plate (41) to move away from the needle shaft (2). The number of arc-shaped plates (41) is even, and includes alternately arranged odd-arc plates (411) and even-arc plates (412). The driving component includes a second driving component (20) and a retractable support component (…). 30), the second drive assembly (20) is disposed on the odd arc plate (411), the support assembly (30) is disposed on the even arc plate (412), and at least two second drive assemblies (20) are disposed on the odd arc plate (411) along the axis; when the odd arc plate (411) is away from the nozzle axis (2), it can drive the adjacent even arc plate (412) away from the nozzle axis (2); the odd arc plate (411) forms a first wedge surface on the side facing the even arc plate (412), and the even arc plate (412) forms a second wedge surface on the side facing the odd arc plate (411), and the first wedge surface is used to drive the second wedge surface away from the nozzle axis (2).

2. The steam ejector for automatically adjusting nozzle jamming according to claim 1, characterized in that: The drive assembly further includes a first drive assembly (10), and at least two first drive assemblies (10) are arranged axially on each arc plate (41); the first drive assembly (10) includes a first drive member (11) fixed on the outer wall of the housing (3), a lead screw (12) fixedly connected to the output shaft of the first drive member (11), a first elastic member (13) sleeved on the lead screw (12), and a vertical sleeve (14) fixed on the outer wall of each arc plate (41). One end of the first elastic member (13) and the end of the vertical sleeve (14) opposite to the arc plate (41) are fixed, and the other end of the first elastic member (13) is arranged on the inner wall of the housing (3). The lead screw (12) extends into the vertical sleeve (14) and the two are threadedly connected.

3. A steam ejector for automatically adjusting nozzle jamming according to claim 1, characterized in that: A first groove (4111) is formed on the first wedge-shaped surface, and a first hinge rod (5) is hinged in the first groove (4111). The first hinge rod (5) is also hinged on the second wedge-shaped surface.

4. A steam ejector for automatically adjusting nozzle jamming according to claim 1, characterized in that: A second groove (4112) is formed on the first wedge-shaped surface, and a third groove (4121) is formed on the second wedge-shaped surface. A second hinge rod (6) is hinged in the second groove (4112), and one end of the second hinge rod (6) is located in the third groove (4121) and presses against the groove wall of the third groove (4121).

5. A steam ejector for automatically adjusting nozzle jamming according to claim 1, characterized in that: The support assembly (30) includes a first sleeve (31) fixedly connected to the inner wall of the outer shell (3), a second sleeve (32) slidably sleeved on the first sleeve (31), and a second elastic member (33) with one end disposed inside the first sleeve (31). The other end of the second elastic member (33) is fixed on the even arc plate (412), and one end of the second sleeve (32) is fixed on the even arc plate (412).

6. A steam ejector for automatically adjusting nozzle jamming according to claim 2, characterized in that: The needle actuator (1) is electrically connected to the control system (7), and the control system (7) is electrically connected to the first drive unit (11).

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