Ejector

Abstract

According to the ejector, a second valve element is provided with an adjusting opening, the adjusting opening is located in the fluid upstream direction of the second valve opening, the second valve element can move or rotate relative to a second valve seat component so that the overlapping area of the adjusting opening and the second valve opening can be changed, and the ejection refinement degree of the ejector 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, and the ejection unit includes a nozzle. 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 from the outlet.

[0003] Due to the limitation of the structure of the injector itself, the demand for refined injection under various operating conditions cannot be met. Therefore, how to optimize the structure of the injector to improve the injection refinement of the injector is an issue that technicians in this field need to pay attention to. Summary of the invention

[0004] The present invention provides an injector, comprising a first valve component and a second valve component, wherein the first valve component comprises a first valve core and a first valve seat component, the first valve seat component has a first valve port, and the first valve core can move or rotate relative to the first valve seat component to adjust the fluid flow of the first valve port;

[0005] The second valve component includes a second valve core and a second valve seat component. The second valve core has an adjustment port, which is connected to the first valve port. The second valve seat component has a second valve port, which is located in the fluid upstream direction of the second valve port. The second valve core can move or rotate relative to the second valve seat component to change the overlapping area between the adjustment port and the second valve port.

[0006] The injector provided by the present invention has a second valve core with an adjustment port, which is located in the fluid upstream direction of the second valve port. The second valve core can move or rotate relative to the second valve seat component to change the overlapping area of ​​the adjustment port and the second valve port, which can improve the injection refinement of the injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 : A schematic cross-sectional view of a first specific embodiment of an ejector provided by the present invention;

[0008] Figure 2 : Figure 1 The enlarged schematic diagram of I1 in the middle;

[0009] Figure 3 : Figure 1 Schematic diagram of the cross section along the X-X' direction;

[0010] Figure 4 : Figure 1 A schematic diagram of the three-dimensional structure of the second valve core;

[0011] Figure 5 : Figure 1 A schematic diagram of the partial three-dimensional structure of the middle gear ring;

[0012] Figure 6 : Figure 1 A schematic diagram of the three-dimensional structure of the middle output gear rack;

[0013] Figure 7 : Figure 1 Schematic diagram of the three-dimensional structure of the middle valve seat core;

[0014] Figure 8a : Figure 1 A schematic diagram of the three-dimensional structure of the first sealing sleeve;

[0015] Figure 8b : Figure 1 A schematic diagram of the three-dimensional structure of the second sealing sleeve;

[0016] Fig. 9 : A schematic cross-sectional view of a second specific embodiment of an ejector provided by the present invention;

[0017] Fig.10 : Fig. 9 The enlarged schematic diagram of I 2 in the middle;

[0018] Fig.11 : Fig. 9 A schematic cross-sectional view along the Y-Y' direction;

[0019] Fig.12 : Fig.11 The enlarged schematic diagram of I 3 in the middle;

[0020] Fig.13 : Fig. 9 Schematic diagram of the three-dimensional structure of the middle gate;

[0021] Fig.14 : Fig. 9 Schematic diagram of the three-dimensional structure of the transmission parts.

[0022] Figure 1-Figure 14 Explanation of symbols:

[0023] 100-first valve component, 200 / 200A-second valve component;

[0024] 1-nozzle component, 10-nozzle opening;

[0025] 11-nozzle, 12-nozzle sleeve, 121-guide part;

[0026] 2-valve needle component, 21-valve needle;

[0027] 3-second valve core, 30-adjusting port;

[0028] 31-spherical part, 311-receiving chamber;

[0029] 32-upper shaft portion, 33-lower shaft portion;

[0030] 3A-gate, 30A-adjustment port;

[0031] 31A-adjusting hole portion, 311A-first opening, 32A-cantilever;

[0032] 4 / 4A-second valve seat component;

[0033] 41 / 41A-seat body, 410 / 410A-inner step hole;

[0034] 411 / 411A- step surface of the inner step hole;

[0035] 412 / 412A-injection chamber, 413-body;

[0036] 414-connecting portion, 415A-second step portion;

[0037] 4151A-step surface of the second step portion, 4152A-step wall of the second step portion;

[0038] 42 / 42A-valve seat core, 420-second valve port;

[0039] 421 / 421A-through hole, 422-outer step portion;

[0040] 4221-step surface of the outer step portion, 423-end surface, 43-seal;

[0041] 5-first valve body, 50-high pressure fluid inlet end;

[0042] 6 / 6A-second valve body, 60 / 60A-low-pressure fluid inlet, 600-inner cavity;

[0043] 61-first step portion, 61A-receiving chamber;

[0044] 62A-third step portion, 621A-step surface of the third step portion;

[0045] 7-gear reduction mechanism, 71-output gear rack;

[0046] 711-disc-shaped body portion, 712-boss portion;

[0047] 72-gear ring, 721-ring portion, 7211-tooth portion;

[0048] 722- partition part, 7220- through hole;

[0049] 723-limiting part, 73-planetary gear set;

[0050] 7A-transmission parts, 70A-side grooves;

[0051] 8-sealing sleeve component, 81-spherical inner wall;

[0052] 80 - inner cavity of the sealing sleeve component;

[0053] 82-upper positioning hole, 83-lower positioning hole;

[0054] 84-first sealing sleeve, 841-first limiting hole;

[0055] 842 - communicating hole, 843 - side wall of the first sealing sleeve;

[0056] 85-second sealing sleeve, 851-second limiting hole;

[0057] 852-side wall of the second sealing sleeve;

[0058] 9 / 9A-rotor parts, 91 / 91A-rotor;

[0059] 92 / 92A-screw rod, 93 / 93A-rotor bracket;

[0060] K-control components. DETAILED DESCRIPTION

[0061] 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.

[0062] 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 A schematic diagram of the three-dimensional structure of the second 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.

[0063] like Figure 1 , Figure 2 , Figure 3 The injector comprises a first valve component 100 and a second valve component 200. The first valve component 100 comprises a first valve core and a first valve seat component, the first valve seat component has a first valve port, and the first valve core can move or rotate relative to the first valve seat component to adjust the fluid flow rate flowing out of the first valve port.

[0064] Specifically, in this embodiment, the first valve component 100 includes a nozzle component 1, a valve needle component 2, a rotor component 9 and a first valve body 5. The valve needle component 2 includes a valve needle 21, and the valve needle 21 serves as the first valve core. The nozzle component 1 is fixedly connected to the second valve body 6 of the second valve component 200, and specifically includes a nozzle 11 and a nozzle sleeve 12, the nozzle 11 is roughly funnel-shaped, the nozzle sleeve 12 is roughly cylindrical, and the nozzle 11 and the nozzle sleeve 12 are fixedly connected. The nozzle component 1 has a nozzle port 10, the nozzle component 1 serves as the first valve seat component, and the nozzle port 10 serves as the first valve port. The valve needle 21 is at least partially located at the nozzle port 10.

[0065] The first valve body 5 has a high-pressure fluid inlet end 50 , which is connected to 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 .

[0066] The rotor component 9 includes a rotor 91, a screw 92 and a rotor bracket 93. The rotor 91 is fixedly connected to the screw 92, and the rotor bracket 93 is specifically a nut, which is fixedly connected to the first valve body 5. The rotor bracket 93 is threadedly connected to the screw 92, so that when the rotor 91 rotates, the screw 92 can simultaneously move axially relative to the rotor bracket 93. On the other hand, the screw 92 is limitedly connected to the valve needle component 2, that is, the screw 92 can drive the valve needle component 2 along the axial direction of the rotor 91 (that is, Figure 1 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 opening 10.

[0067] As described above, in this embodiment, the first valve core (valve needle 21) and the first valve port (nozzle port 10) adjust the fluid flow rate flowing out of the first valve port by moving. Of course, the first valve core (spherical valve core) and the first valve port (valve seat port) can also adjust the fluid flow rate by rotating.

[0068] like 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 direction of the rotor 91. Such an arrangement improves the coaxiality of the valve needle 21 and the nozzle 11, which is beneficial to improving the matching accuracy between the two.

[0069] The second valve component 200 includes the aforementioned second valve body 6, the second valve core 3 and the second valve seat component 4. The second valve body 6 is fixedly connected to the second valve seat component 4, and the second valve body 6 includes a low-pressure fluid inlet port 60. 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 11 to form a medium-pressure fluid. The second valve core 3 has a regulating port 30, and the second valve seat component 4 has a second valve port 420. The regulating port 30 is located in the fluid upstream direction of the second valve port 420, that is, the medium-pressure fluid first passes through the regulating port 30 and then flows to the second valve port 420. The second valve core 3 can move or rotate relative to the second valve seat component 4 so that the overlapping area of ​​the regulating port 30 and the second valve port 420 changes, so as to adjust the flow rate of the medium-pressure fluid flowing through the second valve port 420.

[0070] In this solution, an adjustment port is arranged in the upstream direction of the second valve port, and the overlap area between the adjustment port and the second valve port changes to adjust the flow rate of the medium-pressure fluid flowing through the second valve port. In this way, the flow rate of the medium-pressure fluid can be finely adjusted according to system needs, that is, the degree of refinement of the injection is improved, thereby improving the system energy efficiency and meeting the needs of different system working conditions.

[0071] like Figure 2 , Figure 4 Shown and referenced Figure 1 The second valve core 3 of this embodiment is generally hemispherical and can rotate relative to the second valve seat component 4. Specifically, the second valve core 3 includes a spherical portion 31, and the spherical portion 31 includes a receiving chamber 311 and an adjusting 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 mixed in the receiving chamber 311 to form a medium-pressure fluid. The receiving chamber 311 is connected to the adjusting port 30, so that the medium-pressure fluid flows through the adjusting port 30 and then flows to the second valve port 420. Figure 4 As shown, the regulating port 30 is specifically configured to have a gradually changing opening area. As the second valve core 3 rotates relative to the second valve seat component 4, the overlapping area of ​​the regulating port 30 and the second valve port 420 gradually changes, forming a linear adjustment, further improving the refinement of the injection. It should be noted that, according to the needs of the system flow curve, the opening area of ​​the regulating port 30 can be gradually increased or decreased along the rotation direction of the second valve core 3.

[0072] like Figure 1-Figure 8bAs shown, the second valve component 200 further 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 second valve body 6, the sealing sleeve component 8 includes a spherical inner wall 81, the spherical portion 31 of the second valve core 3 is located in the inner cavity 80 of the sealing sleeve component 8, and the spherical portion 31 is sealed against the spherical inner wall 81. Further, the sealing sleeve component 8 has an upper positioning hole 82 and a lower positioning hole 83, the second valve core 3 also includes an upper shaft portion 32 and a lower shaft portion 33, the upper shaft portion 32 is connected to the output gear frame 71 by a keyway, 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, so that the output gear frame 71 can drive the second 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 the present 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 second valve core 3 from both sides of the second valve core 3, so that the upper shaft portion 32 of the second 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 second 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.

[0073] 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 the main parts of the first sealing sleeve 84 and the second sealing sleeve 85 can also be made of metal material, as long as the spherical inner wall 81 is coated with a plastic coating, the sealing performance can also be improved.

[0074] Further, the second valve body 6 includes a first step portion 61 with the step surface facing upward. The gear reduction mechanism 7 also includes a ring gear 72 and a planetary gear set 73. The ring gear 72 is at least partially located in the inner cavity 600 of the second valve body 6, and the ring gear 72 is placed on the first step portion 61. The ring gear 72 is made of metal powder metallurgy, and specifically includes a ring portion 721, a partition portion 722 and a limit portion 723. The inner wall of the ring portion 721 includes a tooth portion 7211, which is meshed with the planetary gear set 73, and is arranged in the longitudinal direction ( Figure 1 In the vertical direction of the paper, perpendicular to the XX' direction), the partition part 722 is located above the sealing sleeve component 8, and the partition part 722 abuts against the sealing sleeve component 8, thereby limiting the sealing sleeve component 8 in the longitudinal direction of the injector. Figure 3 , Figure 8aAs shown, the first sealing sleeve 84 includes a first limiting hole 841 and a connecting hole 842. The nozzle component 1 passes through the first limiting hole 841. Since the nozzle component 1 is fixedly connected to the second valve body 6, the nozzle component 1 can limit the circumferential rotation of the sealing sleeve component 8. The sealing sleeve component 8 does not rotate circumferentially to ensure the sealing effect during the rotation of the second valve core 3. The connecting hole 842 is connected to the low-pressure fluid inlet end 60, and the low-pressure fluid enters the receiving chamber 311 through the connecting hole 842.

[0075] The partition part 722 has a through hole 7220, and the upper shaft part 32 of the second valve core 3 passes through the through hole 7220. The limiting part 723 is specifically a limiting boss, which 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, and 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.

[0076] Of course, the second valve component 200 also includes a control component K, which is in transmission connection with the gear reduction mechanism 7, and 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 displacement of the second valve core 3 relative to the second valve seat component 4 can be controlled separately through the control component K, so as to adjust the overlap area between the regulating port and the second valve port.

[0077] like Figure 1 , Figure 2 As shown, the second valve seat component 4 includes a seat body 41, a valve seat core 42 and a sealing member 43. The seat body 41 is cylindrical and includes an injection cavity 412. The seat body 41 is fixedly connected to the second valve body 6. Figure 1 In the illustrated embodiment, the seat body 41 is a split structure, including a main body portion 413 and a connecting portion 414. When the main body portion 413 and the second valve body 6 are made of different materials, for example, the second valve body 6 is made of stainless steel and the main body portion 413 is made of copper, at this time, the connecting portion 414 is made of the same stainless steel material as the second valve body 6. In this way, the main body portion 413 and the connecting portion 414 can be first brazed into one in a furnace, and then the connecting portion 414 is fixed to the second valve body 6 by laser welding.

[0078] 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 2In 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 in clearance with the hole wall of the inner step hole portion 410, and another portion of the valve seat core 42 partially penetrates the second limiting hole 851 of the second sealing sleeve 85 and abuts against the second valve core 3. The valve seat core 42 includes a through hole 421 extending along the axial direction of the seat body 41, and the end of the through hole 421 close to the nozzle component 1 serves as the second valve port 420, and the through hole 421 is connected to the above-mentioned injection chamber 412. 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 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 second valve core 3. As a specific embodiment, in order to adapt to the spherical portion 31, the end surface 423 of the valve seat core 42 facing the second valve core 3 is set as a spherical concave surface.

[0079] Fig. 9 A schematic cross-sectional view of a second specific embodiment of an ejector provided by the present invention; Fig.10 for Fig. 9 The enlarged schematic diagram of I2 in the middle; Fig.11 for Fig. 9 A schematic cross-sectional view along the Y-Y' direction; Fig.12 for Fig.11 The enlarged schematic diagram of I 3 in the middle; Fig.13 for Fig. 9 Schematic diagram of the three-dimensional structure of the middle gate; Fig.14 for Fig. 9 Schematic diagram of the three-dimensional structure of the transmission parts.

[0080] The difference between this embodiment and the above embodiment lies in the structure of the second valve component. The second valve component 200A includes a gate 3A and a second valve body 6A. The gate 3A includes an adjustment port 30A. The gate 3A can move along the longitudinal direction of the injector relative to the second valve seat component 4. The gate 3A serves as a second valve core. Fig.13 As shown, the regulating port 30A is set to a shape with a gradual opening. As the gate 3A moves along the longitudinal direction of the injector relative to the second valve seat component 4, the overlapping area of ​​the regulating port 30A and the second valve port 420 gradually changes, forming a linear regulation, which further improves the refinement of the injection.

[0081] It should be noted that, as a feasible method, the control part of the second valve component 200A can adopt the structure of the rotor component in the above-mentioned embodiment. Specifically, the rotor component 9A includes a rotor 91A, a screw rod 92A and a rotor bracket 93A. The rotor 91A is fixedly connected to the screw rod 92A, the screw rod 92A is threadedly connected to the rotor bracket 93A, the screw rod 92A is limitedly connected to the gate plate 3A, and the screw rod 92 can drive the gate plate 3A to move along the longitudinal direction of the injector.

[0082] Further, the second valve body 6A includes a receiving chamber 61A and a low-pressure fluid inlet end 60A, the receiving chamber 61A is connected to the regulating port 30A, the receiving chamber 61A is connected to the low-pressure fluid inlet end 60A, the receiving chamber 61A is connected to the nozzle port 10, and the nozzle 11 of the nozzle component 1 is at least partially located in the receiving chamber 61A. In this way, the high-pressure fluid and the low-pressure fluid are generally mixed in the receiving chamber 61A to form a medium-pressure fluid, and the receiving chamber 61A is connected to the regulating port 30A, so that the medium-pressure fluid flows through the regulating port 30A and then flows to the second valve port 420. The following focuses on the differences between this embodiment and the previous embodiment. In this embodiment, the parts of the structure that are the same as those in the previous embodiment are described by referring to the figure marks in the first embodiment.

[0083] As a further technical solution, Fig.13 As shown, the gate 3A includes an adjusting hole portion 31A, and the adjusting hole portion 31A includes a first opening 311A ​​on the side close to the nozzle component 1 and an adjusting port 30A on the side close to the second valve port 420. The opening area of ​​the adjusting port 30A is gradually set. According to the needs of the system flow curve, the opening area of ​​the adjusting port 30A can be gradually increased or decreased along the longitudinal direction of the injector, and the equivalent flow area of ​​the first opening 311A ​​is larger than the equivalent flow area of ​​the adjusting port 30A. In this way, the equivalent flow area of ​​the first opening 311A ​​is set larger without affecting the inflow of the medium-pressure fluid (mixed fluid), and the equivalent flow area of ​​the adjusting port 30A is set smaller, which is easy to cooperate with the second valve port 420 to adjust the fluid flow entering the second valve port 420.

[0084] The second valve seat component 4A of this embodiment includes a seat body 41A, which is an integral structure and is directly welded and fixed to the second valve body 6A. The seat body 41A is cylindrical and includes an injection cavity 412A. The seat body 41A includes a second step portion 415A with a step surface facing the nozzle component 1. The second valve body 6A includes a third step portion 62A with a step surface facing the second valve port 420. The seat body 41A contacts the step surface 621A of the third step portion 62A. In the axial direction of the seat body 41A, the step surface 4151A of the second step portion 415A and the step surface 621A of the third step portion 62A can guide the gate plate 3A, that is, the step surface 4151A of the second step portion 415A and the step surface 621A of the third step portion 62A are guided and matched with the gate plate 3A; the step wall 4152A of the second step portion 415A is annular, and in the radial direction of the seat body 41A, the step wall 4152A of the second step portion 415A can guide the gate plate 3A, that is, the step wall 4152A of the second step portion 415A is guided and matched with the gate plate 3A. By guiding the gate plate 3A, the matching accuracy between the gate plate 3A and the second valve port 420 is improved during its longitudinal movement along the injector, thereby improving the injection refinement of the injector.

[0085] Further, the second valve component 200A also includes a transmission member 7A. Specifically, the screw rod 92A is limitedly connected to the transmission member 7A, and the transmission member 7A is limitedly connected to the gate plate 3A. The transmission member 7A can drive the gate plate 3A to move in the longitudinal direction of the injector. Specifically, the upper section of the gate plate 3A includes a cantilever 32A, and the lower section of the transmission member 7A includes a side groove 70A. The cantilever 32A is at least partially located in the side groove 70A, and the cantilever 32A is overlapped with the side groove 70A so that the two are limitedly connected in the longitudinal direction of the injector. Through the limited connection, the gate plate 3A can have a certain free adjustment space in the radial direction relative to the transmission member 7A, reducing the coaxiality requirements of the two, and the gate plate 3A is not easy to get stuck during the movement.

[0086] In this embodiment, the second valve seat component 4A further includes a valve seat core 42A, the seat body 41A includes an inner step hole portion 410A with a step surface facing the side of the nozzle component 1, the inner step hole portion 410A is connected to the second step portion 415A, the valve seat core 42A is at least partially located in the inner step hole portion 410A, the valve seat core 42A includes a through hole 421A extending along the axial direction of the seat body 41A, the end of the through hole 421A close to the nozzle component 1 is used as the second valve port 420, and the through hole 421A is connected to the injection chamber 412A. The valve seat core 42A includes an outer step portion 422A with a step surface facing the side away from the nozzle component 1, and the sealing member 43 is disposed on the outer step portion 422A. Along the axial direction of the seat body 41A, the gate plate 3A abuts against the valve seat core 42A, the step surface 4221A of the outer step portion 422A abuts against the seal 43, and the seal 43 abuts against the step surface 411A of the inner step hole portion 410A. The technical effect is the same as that of the above embodiment and will not be repeated here. 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.

[0087] 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 first valve component and a second valve component, wherein the first valve component comprises a first valve core and a first valve seat component, the first valve seat component has a first valve port, and the first valve core can move or rotate relative to the first valve seat component to adjust the fluid flow of the first valve port; The second valve component includes a second valve core and a second valve seat component. The second valve core has an adjustment port, which is connected to the first valve port. The second valve seat component has a second valve port, which is located in the fluid upstream direction of the second valve port. The second valve core can move or rotate relative to the second valve seat component to change the overlapping area between the adjustment port and the second valve port.

2. The injector according to claim 1, characterized in that The first valve component includes a valve needle component and a nozzle component. The valve needle component includes a valve needle. The valve needle serves as the first valve core. The nozzle component has a nozzle port. The valve needle is at least partially located at the nozzle port. The nozzle component serves as the first valve seat component. The nozzle port serves as the first valve port.

3. The injector according to claim 2, characterized in that The first valve component also includes a first valve body, which includes a high-pressure fluid inlet end, and the high-pressure fluid inlet end is connected to the nozzle opening; the second valve component also includes a second valve body, which is fixedly connected to the nozzle component, and the second valve body includes a low-pressure fluid inlet end.

4. The injector according to claim 3, characterized in that The second valve core can rotate relative to the second valve seat component, the second valve core includes a spherical portion, the spherical portion includes the regulating port and a receiving chamber, the opening area of ​​the regulating port is gradually set, the receiving chamber is connected with the low-pressure fluid inlet end, the receiving chamber can be connected with the nozzle port, the mouth of the nozzle component is at least partially located in the receiving chamber, and the receiving chamber is connected with the regulating port.

5. The injector according to claim 4, characterized in that The second valve component also includes a gear reduction mechanism and a sealing sleeve component, the gear reduction mechanism includes an output gear rack, the sealing sleeve component is located in the inner cavity of the second valve body, the sealing sleeve component includes a spherical inner wall, the spherical portion is located in the inner cavity of the sealing sleeve component, the spherical portion is in contact with the spherical inner wall, the sealing sleeve component has an upper positioning hole and a lower positioning hole, the second valve core also includes an upper shaft portion and a lower shaft portion, the upper shaft portion is connected to the output gear rack keyway, 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, and the output gear rack can drive the second valve core to rotate relative to the sealing sleeve component.

6. The injector according to claim 5, characterized in that The second valve body includes a first step portion with the step surface facing upward, the gear reduction mechanism also includes a ring gear and a planetary gear set, the ring gear is placed on the first step portion, the ring gear includes a ring portion, a partition portion and a limit portion, the inner wall of the ring portion includes a tooth portion, the tooth portion is meshed with the planetary gear set, in the longitudinal direction of the injector, the partition portion is located above the sealing sleeve component, the partition portion is abutted against the sealing sleeve component, the partition portion has a through hole, the upper shaft portion passes through the through hole, the limit portion protrudes upward from the partition portion, the limit portion is connected to the ring portion, the output gear frame includes a disc-shaped main body portion and a boss portion protruding downward from the disc-shaped main body portion, the output gear frame is placed on the partition portion, and the boss portion can abut against the limit portion to limit the circumferential rotation stroke of the output gear frame.

7. The injector according to claim 4, characterized in that The second valve seat component includes a seat body, a valve seat core and a sealing member, the seat body includes an injection cavity, the seat body is fixedly connected to the second valve body, the seat body includes an inner step hole portion with a step surface facing the nozzle component, the valve seat core portion 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 valve seat core includes a through hole extending along the axial direction of the seat body, the end of the through hole close to the nozzle component serves as the second valve port, the through hole is communicated with the injection cavity, the valve seat core includes an outer step portion with a step surface facing a side away from the nozzle component, the sealing member covers the outer step portion, and 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.

8. The injector according to claim 3, characterized in that The second valve component includes a gate plate, the gate plate includes the regulating port, the gate plate can move relative to the second valve seat component along the longitudinal direction of the injector, the gate plate serves as the second valve core, the second valve body includes a receiving chamber, the receiving chamber is connected to the regulating port, the receiving chamber is connected to the low-pressure fluid inlet end, the receiving chamber is connected to the nozzle port, and the mouth of the nozzle component is at least partially located in the receiving chamber.

9. The injector according to claim 8, characterized in that The gate plate includes an adjustment hole portion, which includes a first opening close to one side of the nozzle component and the adjustment port close to the second valve port. The opening area of ​​the adjustment port is gradually set, and the equivalent flow area of ​​the first opening is larger than the equivalent flow area of ​​the adjustment port.

10. The injector according to claim 8, characterized in that The second valve seat component includes a seat body, the seat body includes a second step portion with a step surface facing the nozzle component, the second valve body includes a third step portion with a step surface facing the second valve port, the seat body is in contact with the step surface of the third step portion, the seat body is fixedly connected to the second valve body, in the axial direction of the seat body, the step surface of the second step portion and the step surface of the third step portion cooperate with the gate plate guide, and in the radial direction of the seat body, the step wall of the second step portion cooperates with the gate plate guide.

11. The injector according to claim 10, characterized in that The second valve seat component also includes a valve seat core and a sealing member. The seat body includes an inner step hole portion with a step surface facing the side of the nozzle component, the inner step hole portion is connected to the second step portion, and the valve seat core is at least partially located in the inner step hole portion. The valve seat core includes a through hole extending along the axial direction of the seat body, and one end of the through hole close to the nozzle component serves as the second valve port. The through hole is connected to the injection chamber. The valve seat core includes an outer step portion with a step surface facing the side away from the nozzle component, and the sealing member covers the outer step portion. Along the axial direction of the seat body, the gate plate 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.

12. The injector according to claim 8, characterized in that The second valve component further includes a transmission member, which is limitedly connected to the gate plate and can drive the gate plate to move along the longitudinal direction of the injector.

13. The injector according to any one of claims 1 to 12, characterized in that: The first valve component also includes a rotor component and a first valve body, the rotor component includes a rotor, a screw rod and a rotor bracket, the rotor is fixedly connected to the screw rod, the screw rod is threadedly connected to the rotor bracket, the rotor bracket is fixedly connected to the first valve body, the screw rod is limitedly connected to the valve needle component, the screw rod can drive the valve needle component to move axially along the rotor, the nozzle component includes a guide part, the outer circumferential surface of the valve needle and the inner circumferential surface of the guide part are matched along the axial guidance of the rotor.

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