Ejector

Abstract

A sealing sleeve component is at least partially located in an inner cavity of a main valve body, a valve element is at least partially located in an inner cavity of the sealing sleeve component, a spherical part of the valve element is attached to the spherical inner wall of the sealing sleeve component, and a nozzle component is fixedly connected with the main valve body. The nozzle part penetrates through the first limiting hole of the sealing sleeve part to limit circumferential rotation of the sealing sleeve part. The sealing performance between the valve element and the sealing sleeve part can be improved.

Description

Technical Field

[0001] The invention belongs to the technical field of fluid control, and in particular relates to an injector. Background Art

[0002] The ejector is widely used as a fluid control device. The ejector generally includes a body unit and an ejection unit. The body unit includes a low-pressure fluid inlet, and the ejection unit includes a nozzle. The nozzle is the high-pressure fluid inlet. When the ejector is working, two fluids of different pressures mix with each other and exchange energy, forming a medium-pressure fluid that flows out of the ejection flow channel of the ejector. Summary of the invention

[0003] The present invention proposes an injector, comprising a main valve body, a sealing sleeve component, a valve core and a nozzle component, wherein the sealing sleeve component is at least partially located in the inner cavity of the main valve body, the valve core is at least partially located in the inner cavity of the sealing sleeve component, the sealing sleeve component comprises a spherical inner wall, the spherical inner wall serves as a cavity wall of the inner cavity of part of the sealing sleeve component, the valve core comprises a spherical portion, the spherical portion is in contact with the spherical inner wall, the spherical portion comprises a receiving chamber, the nozzle component is fixedly connected to the main valve body, the nozzle component comprises a mouth, the mouth is at least partially located in the receiving chamber, the sealing sleeve component comprises a first limiting hole, and the nozzle component passes through the first limiting hole to limit the circumferential rotation of the sealing sleeve component.

[0004] In the injector provided by the present invention, the sealing sleeve component is at least partially located in the inner cavity of the main valve body, the valve core is at least partially located in the inner cavity of the sealing sleeve component, the spherical part of the valve core is fitted with the spherical inner wall of the sealing sleeve component, the nozzle component is fixedly connected to the main valve body, and the nozzle component passes through the first limiting hole of the sealing sleeve component to limit the circumferential rotation of the sealing sleeve component. The present application can improve the sealing performance between the valve core and the sealing sleeve component. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 : A schematic cross-sectional view of a first specific embodiment of an ejector provided by the present invention;

[0006] Figure 2 : Figure 1 The enlarged schematic diagram of I1 in the middle;

[0007] Figure 3 : Figure 1 Schematic diagram of the cross section along the X-X' direction;

[0008] Figure 4 : Figure 1 Schematic diagram of the three-dimensional structure of the middle valve core;

[0009] Figure 5 : Figure 1A schematic diagram of the partial three-dimensional structure of the middle gear ring;

[0010] Figure 6 : Figure 1 A schematic diagram of the three-dimensional structure of the middle output gear rack;

[0011] Figure 7 : Figure 1 Schematic diagram of the three-dimensional structure of the middle valve seat core;

[0012] Figure 8a : Figure 1 A schematic diagram of the three-dimensional structure of the first sealing sleeve;

[0013] Figure 8b : Figure 1 Schematic diagram of the three-dimensional structure of the second sealing sleeve. Figure 1-Figure 8b Explanation of symbols:

[0014] 100- auxiliary valve parts, 200- main valve parts;

[0015] 1-nozzle component, 10-nozzle opening;

[0016] 11-nozzle, 111-mouth;

[0017] 12-nozzle sleeve, 121-guide portion;

[0018] 2-valve needle component, 21-valve needle;

[0019] 3-valve core, 30-adjustment port;

[0020] 31-spherical part, 311-receiving chamber;

[0021] 32-upper shaft portion, 33-lower shaft portion;

[0022] 4-valve seat component;

[0023] 41-seat body, 410-inner step hole;

[0024] 411-step surface of inner step hole, 412-injection flow channel,

[0025] 413-main body, 414-connecting part;

[0026] 42-valve seat core, 420-valve port;

[0027] 421-through hole, 422-outer step portion;

[0028] 4221-step surface of the outer step portion, 423-end surface, 43-seal; 5-auxiliary valve body, 50-high-pressure fluid inlet end;

[0029] 6-main valve body, 60-low pressure fluid inlet end, 600-inner cavity; 601-cavity bottom wall, 61-first step portion;

[0030] 7-gear reduction mechanism, 71-output gear rack;

[0031] 711-disc-shaped body portion, 712-boss portion;

[0032] 72-gear ring, 721-ring portion, 7211-tooth portion;

[0033] 722- partition part, 7220- through hole;

[0034] 723-limiting part, 73-planetary gear set;

[0035] 8-sealing sleeve component, 81-spherical inner wall;

[0036] 8-Inner cavity of sealing sleeve component;

[0037] 82-upper positioning hole, 83-lower positioning hole;

[0038] 84-first sealing sleeve, 841-first limiting hole;

[0039] 842 - communicating hole, 843 - side wall of the first sealing sleeve;

[0040] 85-second sealing sleeve, 851-second limiting hole;

[0041] 852-side wall of the second sealing sleeve;

[0042] 9-rotor component, 91-rotor;

[0043] 92-screw rod, 93-rotor bracket;

[0044] K-control components. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. Figure 1 The positions of the components shown in the figure are defined only for the clarity and convenience of expressing the technical solution. It should be understood that the directional words used in this article should not limit the scope of protection requested by this application; it should also be understood that the structural relationships such as connection, fixation, abutment, etc. described in this article, unless otherwise specified to reflect the inventive concept, should include direct and indirect methods.

[0046] Figure 1 It is a cross-sectional structural schematic diagram of a first specific embodiment of the ejector provided by the present invention; Figure 2 for Figure 1 The enlarged schematic diagram of I1 in the middle; Figure 3 for Figure 1 Schematic diagram of the cross section along the X-X' direction; Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the middle valve core; Figure 5 for Figure 1 A schematic diagram of the partial three-dimensional structure of the middle gear ring; Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the middle output gear rack; Figure 7 for Figure 1 Schematic diagram of the three-dimensional structure of the middle valve seat core; Figure 8a for Figure 1 A schematic diagram of the three-dimensional structure of the first sealing sleeve; Figure 8b for Figure 1 Schematic diagram of the three-dimensional structure of the second sealing sleeve.

[0047] like Figure 1 , Figure 2 , Figure 3 As shown, the injector includes a main valve component 200 and an auxiliary valve component 100. Specifically, in this embodiment, the auxiliary valve component 100 is mainly used to adjust the flow rate of the high-pressure fluid, and includes a nozzle component 1, a valve needle component 2, an auxiliary valve body 5 and a rotor component 9.

[0048] As shown in the figure, the nozzle component 1 is fixedly connected to the main valve body 6 of the main valve component 200. It should be noted here that the nozzle component 1 can also be indirectly fixedly connected to the main valve body 6 through the auxiliary valve body 5. The nozzle component 1 specifically includes a nozzle 11 and a nozzle sleeve 12. The nozzle 11 is roughly funnel-shaped, and the nozzle sleeve 12 is roughly cylindrical. The nozzle 11 and the nozzle sleeve 12 are fixedly connected. The nozzle 11 and the nozzle sleeve 12 are separately arranged to facilitate the processing of parts. Of course, it is conceivable that in order to ensure coaxiality, the nozzle 11 and the nozzle sleeve 12 can also be designed as an integral structure. The nozzle 11 includes a cylindrical mouth 111, and the mouth 111 has a nozzle opening 10. The valve needle component 2 includes a valve needle 21, and the valve needle 21 is at least partially located at the nozzle opening 10.

[0049] The auxiliary valve body 5 has a high-pressure fluid inlet end 50 , which can be communicated with the nozzle opening 10 , so that the high-pressure fluid can flow into the nozzle opening 10 through the high-pressure fluid inlet end 50 .

[0050] The rotor component 9 includes a rotor 91, a screw rod 92 and a rotor bracket 93. The rotor 91 is fixedly connected to the screw rod 92, and the rotor bracket 93 is specifically a nut, which is fixedly connected to the auxiliary valve body 5. The rotor bracket 93 is threadedly connected to the screw rod 92, so that when the rotor 91 rotates, the screw rod 92 can simultaneously rotate relative to the rotor bracket 93 along the axial direction of the rotor 91 (i.e. Figure 1 On the other hand, the screw rod 92 is limitedly connected with the valve needle component 2, that is, the screw rod 92 can drive the valve needle component 2 to move along the axial direction of the rotor 91. During this process, the valve needle 21 can abut against or move away from the nozzle 11 to adjust the flow rate of the high-pressure fluid flowing out of the nozzle port 10. Figure 1 As shown, the nozzle sleeve 12 includes a guide portion 121, and the outer circumferential surface of the valve needle 21 cooperates with the inner circumferential surface of the guide portion 121 along the axial guide of the rotor 91. Since the nozzle 11 and the nozzle sleeve 12 are fixedly connected, such an arrangement improves the coaxiality of the valve needle 21 and the nozzle 11, which is beneficial to improving the matching accuracy of the two, thereby improving the regulation accuracy of the high-pressure fluid.

[0051] The main valve component 200 includes the aforementioned main valve body 6, the valve core 3 and the valve seat component 4. The main valve body 6 includes a low-pressure fluid inlet port 60, and the low-pressure fluid flowing in from the low-pressure fluid inlet port 60 is mixed with the high-pressure fluid flowing out of the nozzle port 10 to form a medium-pressure fluid. The valve core 3 can rotate relative to the valve seat component 4, and the valve core 3 has an adjustment port 30. Along the rotation direction of the valve core 3, the opening area of ​​the adjustment port 30 is gradually set. The valve seat component 4 has a valve port 420, and the adjustment port 30 is located in the upstream direction of the fluid of the valve port 420, that is, the fluid first passes through the adjustment port 30 and then flows to the valve port 420. The rotation of the valve core 3 causes the overlap area of ​​the adjustment port 30 and the valve port 420 to change, so as to adjust the flow rate of the fluid flowing through the valve port 420.

[0052] In this solution, an adjustment port is arranged in the upstream direction of the valve port, and the overlap area between the adjustment port and the valve port changes to adjust the flow rate of the fluid flowing through the valve port. With such an arrangement, the flow rate of the medium-pressure fluid can be finely adjusted according to the needs of the system, that is, the degree of refinement of the injection is improved, thereby improving the energy efficiency of the system and meeting the needs of different system working conditions.

[0053] like Figure 2 , Figure 4 Shown and referenced Figure 1The valve core 3 of this embodiment is roughly hemispherical, and part of it is located in the inner cavity of the valve core sleeve component 8 described below. The valve core 3 includes a spherical portion 31, and the spherical portion 31 includes a receiving chamber 311 and the above-mentioned regulating port 30. The receiving chamber 311 is connected to the low-pressure fluid inlet end 60, and the receiving chamber 311 can be connected to the nozzle port 10, and the nozzle 11 is at least partially located in the receiving chamber 311. In this way, the high-pressure fluid and the low-pressure fluid are generally collected in the receiving chamber 311, and the receiving chamber 311 is connected to the regulating port 30, so that the collected fluid flows through the regulating port 30 and then flows to the valve port 420. Figure 4 As shown, the regulating port 30 is specifically configured to have a shape with a gradually changing opening area along the rotation direction. As the valve core 3 rotates relative to the valve seat component 4, the overlapping area of ​​the regulating port 30 and the valve port 420 gradually changes, thereby realizing a linear flow regulation function.

[0054] like Figure 1-Figure 8b As shown, the main valve component 200 also includes a gear reduction mechanism 7 and a sealing sleeve component 8. The gear reduction mechanism 7 includes an output gear frame 71. The sealing sleeve component 8 is located in the inner cavity 600 of the main valve body 6, and the sealing sleeve component 8 is limitedly connected to the main valve body 6. The sealing sleeve component 8 includes a spherical inner wall 81, which serves as a cavity wall of the inner cavity 80 of a part of the sealing sleeve component. The spherical portion 31 of the valve core 3 is sealed with the spherical inner wall 81. The inner wall of the sealing sleeve component 8 that matches the spherical portion 31 is designed as a spherical inner wall 81, so that the sealing sleeve component 8 has a large area of ​​contact with the spherical portion 31, which can improve the sealing performance when the valve core 3 rotates.

[0055] Furthermore, the sealing sleeve component 8 has an upper positioning hole 82 and a lower positioning hole 83, and the valve core 3 also includes an upper shaft portion 32 and a lower shaft portion 33. The upper shaft portion 32 is keyway connected to the output gear rack 71, and the upper shaft portion 32 is partially located in the upper positioning hole 82, and the lower shaft portion 33 is at least partially located in the lower positioning hole 83. In this way, the above-mentioned output gear rack 71 can drive the valve core 3 to rotate relative to the sealing sleeve component 8 with the upper shaft portion 32 and the lower shaft portion 33 as the rotation axis. In this embodiment, the sealing sleeve component 8 is composed of a first sealing sleeve 84 and a second sealing sleeve 85. During installation, the first sealing sleeve 84 and the second sealing sleeve 85 clamp the valve core 3 from both sides of the valve core 3, so that the upper shaft portion 32 of the valve core 3 is partially located in the upper positioning hole 82, and the lower shaft portion 33 is at least partially located in the lower positioning hole 83, and then they are installed together into the inner cavity 600 of the main valve body 6. The outer peripheral wall of the sealing sleeve component 8 is tightly matched with the wall forming the inner cavity 600, and, along the lateral direction of the injector, the side wall 843 of the first sealing sleeve 84 is abutted against the side wall 852 of the second sealing sleeve 85.

[0056] As a specific implementation, the first sealing sleeve 84 and the second sealing sleeve 85 in this solution are preferably made of plastic, which has a certain degree of deformation, and the valve core 3 is made of metal material, so that the sealing sleeve component 8 has reliable sealing performance when it cooperates with the valve core 3, and can adapt to high and low temperature working conditions of various refrigerants. Of course, it is conceivable that, as a variation, the main body of the first sealing sleeve 84 and the second sealing sleeve 85 can also be made of metal material, as long as a plastic coating is applied to the spherical inner wall 81, and the plastic coating is fitted with the spherical part 31, the sealing performance can also be improved.

[0057] Furthermore, the injector of this embodiment further includes a pressing member, which is used to press the sealing sleeve component 8 in the longitudinal direction of the injector. Specifically, the cavity wall of the inner cavity 600 forming the main valve body 6 includes a cavity bottom wall 601. Along the longitudinal direction of the injector, the pressing member abuts against the sealing sleeve component 8, and the sealing sleeve component 8 abuts against the cavity bottom wall 601, so that the sealing sleeve component 8 is limited in the longitudinal direction. On the other hand, in this solution, the sealing sleeve component 8 is preferably made of plastic. Therefore, under the pressing action of the pressing member, the sealing sleeve component 8 will be slightly deformed, so that the spherical inner wall 81 will be close to the spherical part 31, which can improve the sealing performance between the sealing sleeve component 8 and the valve core 3.

[0058] Specifically, the main valve body 6 includes a first step portion 61 with the step surface facing upward. The gear reduction mechanism 7 also includes a gear ring 72, which is made of metal powder metallurgy. The gear ring 72 is at least partially located in the inner cavity 600 of the main valve body 6, and the gear ring 72 is placed on the first step portion 61. The gear ring 72 is fixedly connected or limitedly connected to the main valve body 6. Figure 1 The gear ring 72 is located above the sealing sleeve component 8 (in the up-down direction of the paper, perpendicular to the XX' direction), and the gear ring 72 abuts against the sealing sleeve component 8, and the gear ring 72 serves as the above-mentioned pressing member.

[0059] The gear reduction mechanism 7 further includes a planetary gear set 73. The gear ring 72 specifically includes a ring portion 721, a partition portion 722 and a limiting portion 723. The inner wall of the ring portion 721 includes a tooth portion 7211, which meshes with the planetary gear set 73. Along the longitudinal direction of the injector, the partition portion 722 is located above the sealing sleeve component 8, and the partition portion 722 abuts against the sealing sleeve component 8, thereby limiting the sealing sleeve component 8 in the longitudinal direction of the injector.

[0060] On the other hand, Figure 3 , Figure 8aAs shown, the first sealing sleeve 84 includes a first limiting hole 841 and a connecting hole 842, and the nozzle component 1 passes through the first limiting hole 841. Since the nozzle component 1 is fixedly connected to the main valve body 6, the nozzle component 1 can limit the circumferential rotation of the sealing sleeve component 8. Limiting the circumferential rotation of the sealing sleeve component 8 can improve the sealing performance during the rotation of the valve core 3. The low-pressure fluid inlet end 60 is connected to the connecting hole 842, and the connecting hole 842 is connected to the receiving chamber 311, that is, the low-pressure fluid flows in from the low-pressure fluid inlet end 60 and enters the receiving chamber 311 through the connecting hole 842.

[0061] In this solution, the sealing sleeve component 8 is placed in the inner cavity 600 of the main valve body, and the sealing sleeve component 8 is pressed against the sealing sleeve component 8 in the longitudinal direction of the injector by the gear ring 72, so as to achieve the longitudinal limitation of the sealing sleeve component 8; the nozzle component 1 passes through the first limiting hole 841, so as to achieve the circumferential limitation of the sealing sleeve component 8. In this way, the sealing sleeve component 8 is limited in both the longitudinal direction and the circumferential direction, which can improve the sealing performance between the valve core 3 and the sealing sleeve component 8.

[0062] It should be noted that, on the one hand, the first sealing sleeve 84 is combined with the second sealing sleeve 85 to form an upper positioning hole 82 and a lower positioning hole 83 to facilitate the positioning of the valve core 3. On the other hand, by cooperating with the nozzle component 1, the first sealing sleeve 84 realizes circumferential limitation itself and also realizes circumferential limitation for the second sealing sleeve 85. Figure 1 As shown, the first sealing sleeve 84 also has the function of filling the redundant space. By filling the redundant space of the inner cavity 600 of the main valve body 6, the high-pressure fluid sprayed from the nozzle port 10 and the low-pressure fluid flowing into the low-pressure fluid inlet port 60 will only diffuse in a smaller space. Without the filling of the first sealing sleeve 84, the space for the high-pressure fluid to diffuse is larger, which will inevitably affect the negative pressure generated in the receiving chamber 311 area, thereby affecting the entry efficiency of the low-pressure fluid (the kinetic energy of the low-pressure fluid inflow is the negative pressure generated by the high-speed inflow of the high-pressure fluid, and the low-pressure fluid is sucked in through the negative pressure), and finally affecting the overall injection efficiency of the injector.

[0063] like Figure 2 , Figure 5 As shown, the partition part 722 has a through hole 7220, and the upper shaft part 32 of the valve core 3 passes through the through hole 7220. The limiting part 723 is specifically a limiting boss. The limiting part 723 protrudes upward from the partition part 722 along the longitudinal direction of the injector. The limiting part 723 is connected to the ring part 721. The output gear frame 71 includes a disc-shaped body part 711 and a boss part 712 protruding longitudinally downward from the disc-shaped body part 711. The output gear frame 71 is placed on the partition part 722. The boss part 712 can be abutted against the limiting part 723 to limit the circumferential rotation stroke of the output gear frame 71. This solution can improve the limiting reliability of the output gear frame 71 by integrally arranging the limiting part 723 on the ring gear 72.

[0064] like Figure 1 As shown, the main valve component 200 further includes a control component K, which is in transmission connection with the planetary gear set 73 of the gear reduction mechanism 7, and the control component K can drive the planetary gear set 73 to rotate. The control component K is independent of the aforementioned rotor component 9 and can be controlled separately, that is, the rotation displacement of the valve core 3 relative to the valve seat component 4 can be controlled separately through the control component K, so as to adjust the overlap area between the regulating port 30 and the valve port 420.

[0065] like Figure 1 , Figure 2 As shown, the valve seat component 4 specifically includes a seat body 41 and a valve seat core 42. The seat body 41 is cylindrical and includes an injection flow channel 412. The seat body 41 is fixedly connected to the main valve body 6. As a specific embodiment, Figure 1 In the embodiment shown, the seat body 41 is a split structure, including a body part 413 and a connecting part 414. When the body part 413 and the main valve body 6 are made of different materials, for example, the main valve body 6 is made of stainless steel and the body part 413 is made of copper, then the connecting part 414 is made of the same stainless steel as the main valve body 6. In this way, the body part 413 and the connecting part 414 can be first welded into one piece by furnace welding, and then the connecting part 414 is fixed to the main valve body 6 by laser welding. Of course, it is conceivable that the seat body 41 can also be an integrated structure.

[0066] As a further technical solution, the seat body 41 includes an inner step hole portion 410 with a step surface facing the nozzle component 1, such as Figure 2 , Figure 8b In the illustrated embodiment, a portion of the valve seat core 42 is located in the inner step hole portion 410, the outer peripheral wall of the valve seat core 42 is gap-matched with the hole wall of the inner step hole portion 410, and the second sealing sleeve 85 includes a second limiting hole 851, and another portion of the valve seat core 42 passes through the second limiting hole 851 and abuts against the valve core 3. In this arrangement, since the seat body 41 is fixedly connected to the main valve body 6, the circumferential rotation of the sealing sleeve component 8 can be further limited, and the sealing reliability between the sealing sleeve component 8 and the valve core 3 is improved.

[0067] Specifically, the valve seat core 42 includes a through hole 421 extending along the axial direction of the seat body 41, and one end of the through hole 421 close to the nozzle component 1 serves as a valve port 420, and the through hole 421 is connected to the above-mentioned injection channel 412. Further, the valve seat component 4 also includes a sealing member 43, and the valve seat core 42 includes an outer step portion 422 with a step surface facing the side away from the nozzle component 1, and the sealing member 43 is sleeved on the outer step portion 422. Along the axial direction of the seat body 41, the spherical portion 31 abuts against the valve seat core 42, the step surface 4221 of the outer step portion 422 abuts against the sealing member 43, and the sealing member 43 abuts against the step surface 411 of the inner step hole portion 410. By providing the sealing member 43, on the one hand, the gap between the outer peripheral wall of the valve seat core 42 and the hole wall of the inner step hole portion 410 can be sealed; on the other hand, the valve seat core 42 can be elastically compensated, so that the valve seat core 42 always abuts against the spherical portion 31 of the valve core 3. As shown in FIG. Figure 2 , Figure 7 As shown, as a specific implementation, in order to adapt to the spherical portion 31 to improve the fit of the two parts, the end surface 423 of the valve seat core 42 facing the valve core 3 is set to a spherical concave surface.

[0068] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An ejector, characterized in that: The invention comprises a main valve body, a sealing sleeve component, a valve core and a nozzle component, wherein the sealing sleeve component is at least partially located in the inner cavity of the main valve body, and the valve core is at least partially located in the inner cavity of the sealing sleeve component. The sealing sleeve component includes a spherical inner wall, and the spherical inner wall serves as a cavity wall of a part of the inner cavity of the sealing sleeve component. The valve core includes a spherical portion, and the spherical portion is in contact with the spherical inner wall. The spherical portion includes a receiving chamber. The nozzle component is fixedly connected to the main valve body, and the nozzle component includes a mouth, and the mouth is at least partially located in the receiving chamber. The sealing sleeve component includes a first limiting hole, and the nozzle component passes through the first limiting hole to limit the circumferential rotation of the sealing sleeve component.

2. The injector according to claim 1, characterized in that It also includes a pressing piece, and the cavity wall forming the inner cavity of the main valve body includes a cavity bottom wall. Along the longitudinal direction of the injector, the pressing piece abuts against the sealing sleeve component, and the sealing sleeve component abuts against the cavity bottom wall.

3. The injector according to claim 2, characterized in that It also includes a gear reduction mechanism, which includes a gear ring. The main valve body includes a first step portion with the step surface facing upward, and the gear ring is placed on the first step portion. The gear ring is fixedly connected or limit-connected to the main valve body. Along the longitudinal direction of the injector, the gear ring abuts against the sealing sleeve component, and the gear ring serves as the pressure member.

4. The injector according to claim 3, characterized in that The gear ring includes a ring portion and a partition portion, the inner wall of the ring portion includes a tooth portion, the gear reduction mechanism also includes a planetary gear set, the tooth portion is meshed with the planetary gear set, along the longitudinal direction of the injector, the partition portion is located above the sealing sleeve component, the partition portion is against the sealing sleeve component, the partition portion has a through hole, and the upper shaft portion of the valve core passes through the through hole.

5. The injector according to claim 4, characterized in that The gear ring also includes a limiting portion, which protrudes upward from the partition portion and is connected to the ring portion. The gear reduction mechanism also includes an output gear rack, which is located in the gear ring and is connected to the keyway of the upper shaft portion. The output gear rack includes a disc-shaped body portion and a boss portion protruding downward from the disc-shaped body portion. The output gear rack is placed on the partition portion, and the boss portion can be abutted against the limiting portion to limit the circumferential rotation stroke of the output gear rack.

6. The injector according to any one of claims 1 to 5, characterized in that: The sealing sleeve component is made of plastic, or the spherical inner wall has a coating of plastic material. The sealing sleeve component has an upper positioning hole and a lower positioning hole. The valve core includes an upper shaft portion and a lower shaft portion. The upper shaft portion is partially located in the upper positioning hole, and the lower shaft portion is at least partially located in the lower positioning hole. The valve core can rotate relative to the sealing sleeve component.

7. The injector according to any one of claims 1 to 5, characterized in that: The mouth has a nozzle opening, which can be connected to the receiving chamber. The main valve body includes a low-pressure fluid inlet end, which is connected to the receiving chamber. The spherical part also includes an adjustment port, which is connected to the receiving chamber. The injector also includes a valve seat component, which has a valve port, and the adjustment port is located in the fluid upstream direction of the valve port.

8. The injector according to claim 7, characterized in that The sealing sleeve component further comprises a communicating hole, the low-pressure fluid inlet end is in communication with the communicating hole, and the communicating hole is in communication with the receiving chamber.

9. The injector according to claim 7, characterized in that The auxiliary valve component includes the nozzle component, the valve needle component and the auxiliary valve body, the valve needle component includes a valve needle, and the valve needle is at least partially located at the nozzle opening, the auxiliary valve body is fixedly connected to the main valve body, and the auxiliary valve body includes a high-pressure fluid inlet end, and the high-pressure fluid inlet end can be communicated with the nozzle opening.

10. The injector according to claim 7, characterized in that Along the rotation direction of the valve core, the opening area of ​​the regulating port is gradually changed, and the valve core can rotate relative to the valve seat component to change the overlapping area of ​​the regulating port and the valve port.

11. The injector according to any one of claims 1 to 5, characterized in that: The sealing sleeve component includes a first sealing sleeve and a second sealing sleeve. The first sealing sleeve and the second sealing sleeve sandwich the valve core. The first sealing sleeve includes the first limiting hole. Along the transverse direction of the injector, the first sealing sleeve and the second sealing sleeve abut against each other.

12. The injector according to claim 11, characterized in that The valve seat component also includes a seat body and a valve seat core. The seat body includes an injection flow channel. The seat body is fixedly connected to the main valve body. The seat body includes an inner step hole portion with a step surface facing the nozzle component. A part of the valve seat core is located in the inner step hole portion. The outer peripheral wall of the valve seat core is gap-matched with the hole wall of the inner step hole portion. The second sealing sleeve includes a second limiting hole. Another part of the valve seat core passes through the second limiting hole to limit the circumferential rotation of the sealing sleeve component. The valve seat core includes a through hole extending along the axial direction of the seat body. One end of the through hole close to the nozzle component serves as a valve port. The through hole is communicated with the injection flow channel.

13. The injector according to claim 12, characterized in that The valve seat core includes an outer step portion with a step surface facing the side away from the nozzle component. The valve seat component also includes a sealing member. The sealing member is sleeved on the outer step portion. Along the axial direction of the seat body, the spherical portion abuts against the valve seat core, the step surface of the outer step portion abuts against the sealing member, and the sealing member abuts against the step surface of the inner step hole portion.

14. The injector according to any one of claims 1 to 5, characterized in that: The valve stem is a valve cap that is fixedly connected to the valve body and the guide rail that is threadedly connected to the rotor support. The valve cap is fixedly connected to the valve body and the guide rail that is threadedly connected to the rotor support. The valve cap is fixedly connected to the valve body and the guide rail that is threadedly connected to the rotor support. The guide rail that is fixedly connected to the valve stem is limitedly connected to the valve stem. The guide rail can drive the valve stem to move axially along the rotor. The nozzle stem includes a guide portion. The valve stem stem includes a valve needle. The outer circumferential surface of the valve needle cooperates with the inner circumferential surface of the guide portion along the axial direction of the rotor.

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