Closable adjustable cavitation pipe and airspace engine system

Abstract

The embodiment of the invention provides a closable adjustable cavitation pipe and an airspace engine system. The closable adjustable cavitation pipe comprises an adjustable cavitation pipe valve body, a throttling cone, a driving mechanism at the upper end of the throttling cone and a disc-shaped valve element on the outer side of the throttling cone. The inlet end on the side is communicated with the cavity of the adjustable cavitation pipe valve body through a through hole; the lower end of the throttling cone faces the outlet end of the adjustable cavitation pipe valve body, a conical structure is arranged at the lower end of the throttling cone, a throttling table is arranged in the outlet end of the adjustable cavitation pipe valve body, and the minimum caliber of the throttling table is larger than the maximum outer diameter of the conical structure; a valve seat is further fixedly connected into the adjustable cavitation pipe valve body, the top face of the valve seat is perpendicular to the axis of the throttling cone, a through hole is formed in the middle of the valve seat, and the outer diameter of the valve element is larger than the hole diameter of the through hole. The valve seat is located between the throttling table and the through hole. According to the technical scheme, a closing structure composed of the valve element and the valve seat is integrated on the adjustable cavitation pipe, reliable closing and sealing of the adjustable cavitation pipe are achieved, and the structure of an airspace engine system is simplified.

Description

Technical Field

[0001] The invention relates to the technical field of aerospace engines, and in particular to a closable and adjustable cavitation tube and an aerospace engine system. Background Art

[0002] The adjustable cavitation tube is a commonly used regulator in the field of aerospace and aviation technology. It adjusts the throat throttling area by controlling the stroke of the regulating cone to adjust the medium flow required by the engine, and then adjusts the thrust generated by the engine to meet the needs of variable working conditions or variable thrust. The adjustable cavitation tube is usually driven by a motor or other drive device to drive the regulating cone to move, meet the system regulation needs within a certain flow range, and has the advantages of high regulation accuracy, simple and reliable structure.

[0003] In the process of implementing the present invention, the inventors found that there are at least the following problems in the prior art:

[0004] In existing aerospace and aviation engine systems, adjustable cavitation tubes are usually used to calibrate and adjust the system working conditions. However, the commonly used adjustable cavitation tubes are normally open structures and cannot realize the closing function. Therefore, a stop valve needs to be connected in series in the system to realize the opening and closing functions of the system, which increases the complexity of the system to a certain extent and is not conducive to the optimization of the system. Therefore, how to optimize the adjustable cavitation tube to simplify the system structure is a problem that needs to be solved. Summary of the invention

[0005] The embodiment of the present invention provides a closable adjustable cavitation tube and an aerospace engine system, which are used to simplify the structure of the aerospace engine system, so that there is no need to additionally configure a stop valve for the adjustable cavitation tube.

[0006] To achieve the above-mentioned purpose, on the one hand, an embodiment of the present invention provides a closable adjustable cavitation tube, comprising an adjustable cavitation tube valve body with a cavity arranged inside, a cylindrical throttling cone coaxially arranged in the adjustable cavitation tube valve body, a driving mechanism connected to the upper end of the throttling cone, and a disc-shaped valve core connected to the outer side of the throttling cone, wherein the bottom surface of the valve core is perpendicular to the axis of the throttling cone; an inlet end is also fixedly connected to the side of the adjustable cavitation tube valve body, and the inlet end is connected to the cavity inside the adjustable cavitation tube valve body through a through hole; the lower end of the throttling cone faces the adjustable The outlet end of the cavitation tube valve body and the lower end of the throttling cone are provided with a conical structure, and a throttling platform is provided on the inner side of the outlet end of the adjustable cavitation tube valve body, and the minimum diameter of the throttling platform is larger than the maximum outer diameter of the conical structure; a valve seat is also fixedly connected to the adjustable cavitation tube valve body, and the top surface of the valve seat is perpendicular to the axis of the throttling cone, a through hole is opened in the middle of the valve seat, and the outer diameter of the valve core is larger than the aperture of the through hole; in the direction along the axis of the adjustable cavitation tube valve body, the valve seat is located between the throttling platform and the through hole; the throttling cone can move along the axial direction of the adjustable cavitation tube valve body.

[0007] Furthermore, the closable adjustable cavitation tube also includes a valve core support platform connected to the outside of the throttling cone, an annular groove is provided at the bottom of the valve core support platform, the valve core is sleeved in the annular groove, and the valve core is sleeved on the outside of the throttling cone; a buffer spring is also provided between the top surface of the valve core and the bottom of the annular groove.

[0008] Furthermore, the valve core support platform and the throttling cone form an integrated structure.

[0009] Furthermore, a guide sealing ring is provided between the valve core and the throttling cone.

[0010] Furthermore, a sealing gasket installation groove is provided on the bottom surface of the valve core, and an annular sealing gasket is provided in the sealing gasket installation groove; an annular boss protruding upward is also provided on the top surface of the valve seat, and the boss is located below the sealing gasket; the bottom surface of the sealing gasket is a plane, and the sealing gasket is made of metal or non-metallic material.

[0011] Furthermore, an annular conical platform protruding upward is provided on the top surface of the valve seat, and a conical groove matching the conical platform is provided on the bottom surface of the valve core. Both the valve seat and the valve core are made of metal.

[0012] Furthermore, the buffer spring is a cylindrical spring or a butterfly spring.

[0013] Furthermore, a vent hole is provided on the valve core support platform, and the vent hole penetrates the upper surface of the valve core support platform and the bottom of the annular groove.

[0014] Furthermore, the top end of the adjustable cavitation tube valve body is also connected to an end cover, a throttling cone through hole is opened in the middle of the end cover, and the throttling cone through hole is sleeved on the outside of the throttling cone; a first sealing ring is also arranged between the end cover and the throttling cone, and a second sealing ring is also arranged between the end cover and the adjustable cavitation tube valve body.

[0015] On the other hand, an embodiment of the present invention further provides an aerospace engine system, in which the above-mentioned closable adjustable cavitation tube is serially connected in the pipeline of the aerospace engine system.

[0016] The above technical solution has the following beneficial effects:

[0017] In this technical solution, a valve core structure is integrated on the adjustable cone of the cavitation tube of the aerospace engine system, and a valve seat structure is integrated on the valve body. Through the rapid actuation of the driving mechanism, the sealing surfaces of the valve core and valve seat can be quickly contacted when closing, thereby realizing the reliable closing and sealing function of the adjustable cavitation tube. Therefore, the adjustable cavitation tube that can be closed in this technical solution can not only realize the opening and closing and adjustment functions, but also maintain the advantages of the simple and reliable structure and high adjustment accuracy of the adjustable cavitation tube, thereby eliminating a stop valve on the pipeline, avoiding the problem of using two or more valves on the system at the same time to realize the adjustment and opening and closing functions, simplifying the structure, and meeting the needs of continuous optimization of the engine system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a closable and adjustable cavitation tube according to an embodiment of the present invention;

[0020] Figure numbers: 1. Adjustable cavitation tube valve body; 2. Throttle cone; 3. Valve seat; 4. Valve core; 5. End cover; 6. Sealing gasket; 7. Guide sealing ring; 8. Buffer spring; 9. Second sealing ring; 10. First sealing ring; 11. Driving mechanism; 12. Cavity; 13. Throttle platform; 14. Through hole; 15. Valve core support platform. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1As shown, an embodiment of the present invention provides a closable adjustable cavitation tube, comprising an adjustable cavitation tube valve body 1 with a cavity 12 arranged inside, a cylindrical throttling cone 2 coaxially arranged in the adjustable cavitation tube valve body 1, a driving mechanism 11 connected to the upper end of the throttling cone 2, and a disc-shaped valve core 4 connected to the outer side of the throttling cone 2, the bottom surface of the valve core 4 is perpendicular to the axis of the throttling cone 2, and the outer diameter of the valve core should be smaller than the caliber of the cavity 12, so that it can move up and down in the cavity 12 with the throttling cone 2; the side of the adjustable cavitation tube valve body 1 is also fixedly connected with an inlet end, and the inlet end is connected to the cavity 12 inside the adjustable cavitation tube valve body 1 through a through hole, that is, as shown in the figure, the medium inlet direction is parallel to the axis of the adjustable cavitation tube valve body 1 The directions are perpendicular to each other; the lower end of the throttling cone 2 faces the outlet end of the adjustable cavitation tube valve body 1, and the lower end of the throttling cone 2 is provided with a conical structure, and a throttling platform 13 is provided on the inner side of the outlet end of the adjustable cavitation tube valve body 1, and the minimum diameter of the throttling platform 13 is larger than the maximum outer diameter of the conical structure. When the conical structure approaches the minimum diameter of the throttling platform 13 (or called the throat) from top to bottom, the flow area between the lower end of the throttling cone 2 and the throat becomes smaller, so that the flow rate of the medium flowing through the throat becomes smaller, and the more the throttling cone 2 moves downward, the smaller the flow rate of the medium, thereby producing a throttling effect. However, even if the throttling cone 2 moves to the lowest position, there is still a gap between the conical structure at the lower end of the throttling cone 2 and the throat, which is also a feature of the adjustable cavitation tube. A valve seat 3 is also fixedly connected to the adjustable cavitation tube valve body 1, and the top surface of the valve seat 3 is perpendicular to the axis of the throttling cone 2. A through hole 14 is opened in the middle of the valve seat 3, and the outer diameter of the valve core 4 is larger than the aperture of the through hole 14; in the direction along the axis of the adjustable cavitation tube valve body 1, the valve seat 3 is located between the throttling platform 13 and the through hole; the throttling cone 2 can move along the axial direction of the adjustable cavitation tube valve body 1.

[0023] In this technical solution, a valve seat 3 is integrated on the adjustable cavitation tube valve body 1, and a valve core 4 is arranged on the outside of the throttling cone 2. Through the rapid actuation of the driving mechanism 11, the valve core 4 can quickly contact the valve seat 3 to complete the sealing, thereby closing the adjustable cavitation tube.

[0024] When the throttling cone 2 moves to the lowest limit position, the valve core 4 and the valve seat 3 are in contact, the throttling cone 2 stops moving, and the medium upstream of the valve core 4 is blocked from entering the throttling table 13, thereby realizing the closing function of the adjustable cavitation tube. At this time, the conical structure at the lower end of the throttling cone 2 extends into the throat and enters the interior of the throttling table 13, and the throttling cone 2 is in a non-adjustable state.

[0025] When the throttling cone 2 moves upward, after a certain displacement, the valve core 4 and the valve seat 3 are disengaged, and the upstream medium begins to flow downstream. The opening of the valve core 4 enters the set range, and the medium flows through the conical structure at the lower end of the throttling cone 2 and the throat of the throttling platform 13, and cavitation occurs. The adjustable cavitation tube starts to work and changes the medium flow rate as the throttling cone 2 moves up and down.

[0026] Therefore, the closable adjustable cavitation tube of the technical solution can not only realize the opening and closing and adjustment functions, but also maintain the advantages of the adjustable cavitation tube with simple and reliable structure and high adjustment accuracy, thereby avoiding the problem of using two or more valves to realize the adjustment and opening and closing functions on the system at the same time, simplifying the structure and meeting the needs of continuous optimization of the engine system.

[0027] Furthermore, the valve core 4 can be only arranged on the outside of the throttling cone 2, and the valve core 4 and the throttling cone 2 are fixedly connected together. However, in order to achieve a better sealing effect, it is preferred to further arrange a valve core support platform 15 on the outside of the throttling cone 2, and an annular groove is provided at the bottom of the valve core support platform 15, and the valve core 4 is sleeved in the annular groove. At the same time, a buffer spring 8 is also arranged between the top surface of the valve core 4 and the bottom of the annular groove. When the throttling cone 2 moves downward, the valve core 4 first contacts the valve seat 3, and compresses the buffer spring 8 and the medium force to provide the sealing force required by the valve core, until the valve core support platform 15 on the outside of the valve core 4 contacts the upper part of the valve seat 3 to generate a mechanical limit, at which time the throttling cone 2 stops moving. In this process, the buffer spring 8 can be used to avoid impact when the valve core 4 and the valve seat 3 are closed, thereby increasing the service life.

[0028] At this time, it is also necessary to set an annular step surface extending from outside to inside at the bottom of the valve core support platform 15, and the inner diameter of the annular step surface is smaller than the inner diameter of the annular groove, that is, at this time, a constricted structure is formed at the bottom of the valve core support platform 15, and the annular step surface blocks a part of the lower end surface of the valve core 4, which can effectively prevent the valve core 4 from escaping from the valve core support platform 15. Accordingly, the sum of the thickness of the valve core 4 and the thickness of the buffer spring 8 after compression should be less than the depth of the annular groove, so that when the buffer spring 8 is compressed, the annular groove can provide space for the valve core 4 to move up and down.

[0029] Furthermore, the valve core support platform 15 and the throttling cone 2 can be combined and fixedly connected using split parts, which can also play the same sealing role. However, in order to make the connection between the two more reliable and avoid loosening, it is preferred to design the valve core support platform 15 and the throttling cone 2 as an integrated structure, which can be achieved by machining and other methods.

[0030] Furthermore, a guide seal ring 7 is provided between the valve core 4 and the throttling cone 2 , and the guide seal ring 7 can prevent the medium from passing through the inner gap between the valve core 4 and the annular groove and then entering the downstream along the gap between the valve core 4 and the outer side of the throttling cone 2 .

[0031] Furthermore, in order to achieve a better sealing effect, a sealing gasket installation groove may be provided on the bottom surface of the valve core 4, and an annular sealing gasket 6 may be provided in the sealing gasket installation groove, and the sealing gasket 6 may be fixedly connected to the sealing gasket installation groove by interference fit or bonding to prevent it from falling off; an annular boss protruding upward is also provided on the top surface of the valve seat 3, and the boss is located below the sealing gasket 6. When the throttling cone 2 moves downward, the sealing gasket 6 on the valve core 4 and the boss on the valve seat 3 first contact, and the two form a reliable seal. Compared with the integral plane contact between the valve core 4 and the valve seat 3, the contact area between the sealing gasket 6 and the boss during sealing is smaller, and the component processing accuracy is easier to grasp, so the sealing reliability is higher.

[0032] Furthermore, the bottom surface of the sealing gasket 6 is a plane, and the sealing gasket 6 is made of metal or non-metal material, both of which can achieve a sealing effect. The appropriate material can be selected according to parameters such as the pressure level in a specific application.

[0033] Furthermore, in addition to the aforementioned form of cooperation between the sealing gasket 6 and the boss, the sealing gasket 6 may also be omitted, and a metal-to-metal sealing method may be adopted, preferably a conical surface sealing method. In this case, an annular conical platform protruding upward is provided on the top surface of the valve seat 3, and a conical groove matching the conical platform is provided on the bottom surface of the valve core 4. The valve seat 3 and the valve core 4 are both made of metal.

[0034] Furthermore, the buffer spring 8 is a cylindrical spring or a butterfly spring, and can be single or multiple, and can be designed according to the actual situation of the project.

[0035] Furthermore, an air vent is provided on the valve core support platform 15, and the air vent runs through the upper surface of the valve core support platform 15 and the bottom of the annular groove. When the valve core 4 contacts the valve seat 3, the throttling cone 2 can continue to move downward for a certain distance until the valve core support platform 15 contacts the valve seat 3, and the buffer spring 8 is compressed synchronously. In this process, the medium between the bottom of the annular groove and the upper surface of the valve core 4 can be discharged smoothly through the air vent to prevent it from interfering with normal operation.

[0036] Furthermore, the top end of the adjustable cavitation tube valve body 1 is also connected to an end cover 5, a throttling cone through hole is opened in the middle of the end cover 5, and the throttling cone through hole is sleeved on the outside of the throttling cone 2; a first sealing ring 10 is also arranged between the end cover 5 and the throttling cone 2, and a second sealing ring 9 is also arranged between the end cover 5 and the adjustable cavitation tube valve body 1. The use of these two sealing rings can prevent the medium from entering the driving mechanism 11 or leaking into the environment.

[0037] An embodiment of the present invention further provides an aerospace engine system, in which a closable and adjustable cavitation tube as described above is provided in the pipeline of the aerospace engine system. After adopting the closable and adjustable cavitation tube, a stop valve can be omitted in the pipeline, thereby avoiding the problem of using two valves at the same time to realize the adjustment and opening and closing functions, thereby simplifying the structure and meeting the needs of continuous optimization of the aerospace engine system.

[0038] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the appended claims, the invention is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the appended claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.

[0039] The disclosed embodiments are described above to enable any person skilled in the art to implement or use the present invention. Various modifications of these embodiments are obvious to those skilled in the art, and the general principles defined herein may also be applied to other embodiments without departing from the spirit and scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments given herein, but is consistent with the broadest scope of the principles and novel features disclosed in this application.

[0040] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A closable and adjustable cavitation tube, characterized in that: The invention comprises an adjustable cavitation tube valve body (1) having a cavity (12) arranged inside, a cylindrical throttling cone (2) coaxially arranged inside the adjustable cavitation tube valve body (1), a driving mechanism (11) connected to the upper end of the throttling cone (2), and a disc-shaped valve core (4) connected to the outer side of the throttling cone (2), wherein the bottom surface of the valve core (4) is perpendicular to the axis of the throttling cone (2); An inlet end is also fixedly connected to the side of the adjustable cavitation tube valve body (1), and the inlet end is connected to the cavity (12) inside the adjustable cavitation tube valve body (1) through a through hole; The lower end of the throttling cone (2) faces the outlet end of the adjustable cavitation tube valve body (1), and a conical structure is arranged at the lower end of the throttling cone (2). A throttling platform (13) is arranged inside the outlet end of the adjustable cavitation tube valve body (1), and the minimum diameter of the throttling platform (13) is greater than the maximum outer diameter of the conical structure. A valve seat (3) is also fixedly connected to the adjustable cavitation tube valve body (1), the top surface of the valve seat (3) is perpendicular to the axis of the throttling cone (2), a through hole (14) is opened in the middle of the valve seat (3), and the outer diameter of the valve core (4) is larger than the aperture of the through hole (14); In the direction along the axis of the adjustable cavitation tube valve body (1), the valve seat (3) is located between the throttling platform (13) and the through hole; The throttling cone (2) can move along the axial direction of the adjustable cavitation tube valve body (1).

2. The closable and adjustable cavitation tube according to claim 1, characterized in that: It also includes a valve core support platform (15) connected to the outside of the throttling cone (2), the bottom of the valve core support platform (15) is provided with an annular groove, the valve core (4) is sleeved in the annular groove, and the valve core (4) is sleeved on the outside of the throttling cone (2); a buffer spring (8) is also provided between the top surface of the valve core (4) and the bottom of the annular groove.

3. The closable and adjustable cavitation tube according to claim 2, characterized in that: The valve core support platform (15) and the throttling cone (2) form an integrated structure.

4. The closable and adjustable cavitation tube according to claim 2, characterized in that: A guide sealing ring (7) is also provided between the valve core (4) and the throttling cone (2).

5. The closable and adjustable cavitation tube according to claim 2, characterized in that: A sealing gasket installation groove is provided on the bottom surface of the valve core (4), and an annular sealing gasket (6) is provided in the sealing gasket installation groove; an annular boss protruding upward is also provided on the top surface of the valve seat (3), and the boss is located below the sealing gasket (6); the bottom surface of the sealing gasket (6) is a plane, and the sealing gasket (6) is made of metal or non-metal material.

6. The closable and adjustable cavitation tube according to claim 2, characterized in that: The top surface of the valve seat (3) is also provided with an annular conical platform protruding upwards, and the bottom surface of the valve core (4) is provided with a conical groove matching the conical platform. The valve seat (3) and the valve core (4) are both made of metal.

7. The closable and adjustable cavitation tube according to claim 2, characterized in that: The buffer spring (8) is a cylindrical spring or a butterfly spring.

8. The closable and adjustable cavitation tube according to claim 2, characterized in that: The valve core support platform (15) is also provided with an air vent, and the air vent runs through the upper surface of the valve core support platform (15) and the bottom of the annular groove.

9. The closable and adjustable cavitation tube according to claim 1, characterized in that: The top end of the adjustable cavitation tube valve body (1) is also connected to an end cover (5), a throttling cone through hole is opened in the middle of the end cover (5), and the throttling cone through hole is sleeved on the outside of the throttling cone (2); a first sealing ring (10) is also provided between the end cover (5) and the throttling cone (2), and a second sealing ring (9) is also provided between the end cover (5) and the adjustable cavitation tube valve body (1).

10. An aerospace engine system, characterized in that: It comprises a closable and adjustable cavitation tube as described in any one of claims 1-9.

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