A closable and adjustable cavitation tube and aerospace engine system

Abstract

The embodiment of the present invention provides a closable adjustable cavitation tube and aerospace engine system, comprising an adjustable cavitation tube valve body, a throttle cone, a driving mechanism at the upper end of the throttle cone, and a disc-shaped valve core outside the throttle cone; the lateral inlet end is connected to the cavity of the adjustable cavitation tube valve body through a through hole; the lower end of the throttle cone faces the outlet end of the adjustable cavitation tube valve body, and the lower end of the throttle cone is provided with a conical structure, a throttle plate is provided inside the outlet end of the adjustable cavitation tube valve body, and the minimum diameter of the throttle plate 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, the top surface of the valve seat is perpendicular to the axis of the throttle 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; the valve seat is located between the throttle plate and the through hole. This technical solution integrates a closing structure consisting of a valve core and a valve seat on the adjustable cavitation tube, realizes reliable closing and sealing of the adjustable cavitation tube, and simplifies the structure of the aerospace engine system.

Description

Technical Field

[0001] The present 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] Adjustable cavitation tubes are commonly used in aerospace and aviation technology. By controlling the stroke of the regulating cone, the throat throttle area is adjusted to adjust the medium flow required by the engine, thereby adjusting the engine's thrust to meet variable operating conditions or thrust requirements. Adjustable cavitation tubes are typically driven by a motor or other drive device to move the regulating cone, meeting system regulation requirements within a certain flow range. They offer high regulation accuracy, a simple and reliable structure, and are characterized by high control accuracy.

[0003] In the process of implementing the present invention, the inventors discovered that the prior art has at least the following problems:

[0004] Existing aerospace and aviation engine systems typically use adjustable cavitation tubes to calibrate and adjust system operating conditions. However, these commonly used adjustable cavitation tubes are normally open and cannot be closed. Therefore, a shutoff valve must be connected in series to achieve system on / off functionality, increasing system complexity and hindering optimization. Therefore, optimizing the adjustable cavitation tube to simplify the system structure is a challenge that needs to be addressed. Summary of the Invention

[0005] The embodiments of the present invention provide a closable adjustable cavitation tube and an aerospace engine system, which are used to simplify the structure of the aerospace engine system, eliminating the need to additionally configure a stop valve for the adjustable cavitation tube.

[0006] In order 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 outside of the throttling cone, the bottom surface of the valve core is perpendicular to the axis of the throttling cone; the side of the adjustable cavitation tube valve body is also fixedly connected to an inlet end, 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 provided 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 flat, 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 passes through 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 provided between the end cover and the throttling cone, and a second sealing ring is also provided 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 aforementioned closable and 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 into the regulating cone of the adjustable cavitation tube of the aerospace engine system, and a valve seat structure is integrated into the valve body. Through the rapid actuation of the drive mechanism, the sealing surfaces of the valve core and valve seat can quickly contact when closing, realizing the reliable closing and sealing function of the adjustable cavitation tube. Therefore, the closable adjustable cavitation tube in this technical solution can not only realize the opening and closing and adjustment functions, but also maintain the advantages of the simple, reliable structure and high adjustment accuracy of the adjustable cavitation tube. This eliminates a stop valve in the pipeline, avoids the problem of using two or more valves simultaneously to realize the adjustment and opening and closing functions in the system, simplifies the structure, and meets 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 following briefly introduces the drawings required for use in the embodiments. 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 any creative work.

[0019] Figure 1 This is a schematic structural 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 clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts 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 provided therein, a cylindrical throttling cone 2 coaxially provided 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 outside 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 to 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 must still be a gap between the conical structure at the lower end of the throttling cone 2 and the throat. This 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, 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 provided on the outside of the throttle 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 throttle cone 2 moves to the lowest limit position, the valve core 4 and the valve seat 3 come into contact, the throttle cone 2 stops moving, and the medium upstream of the valve core 4 is blocked from entering the throttle platform 13, thereby realizing the closing function of the adjustable cavitation tube. At this time, the conical structure at the lower end of the throttle cone 2 extends into the throat and into the interior of the throttle platform 13, and the throttle cone 2 is in a non-adjustable state.

[0025] When the throttle 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 throttle cone 2 and the throat of the throttle platform 13, and cavitation occurs. The adjustable cavitation tube starts to work and changes the medium flow rate as the throttle cone 2 moves up and down.

[0026] Therefore, the closable adjustable cavitation tube of the present technical solution can realize the opening and closing and adjustment functions, while maintaining 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, it is possible to only provide a valve core 4 on the outside of the throttle cone 2 and to securely connect the valve core 4 to the throttle cone 2. However, to achieve a better sealing effect, it is preferred to further provide a valve core support platform 15 on the outside of the throttle cone 2. The bottom of the valve core support platform 15 is provided with an annular groove, and the valve core 4 is sleeved within the annular groove. At the same time, a buffer spring 8 is provided between the top surface of the valve core 4 and the bottom of the annular groove. When the throttle cone 2 moves downward, the valve core 4 first contacts the valve seat 3, compressing the buffer spring 8 and, together with the medium force, providing 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 portion of the valve seat 3, generating a mechanical limit, at which point the throttle cone 2 stops moving. During this process, the buffer spring 8 can be used to prevent impact when the valve core 4 and valve seat 3 close, thereby increasing their service life.

[0028] In this case, an annular stepped surface extending from the outside to the inside is also required at the bottom of the valve core support platform 15. The inner diameter of this annular stepped surface is smaller than the inner diameter of the annular groove. In other words, a constricted structure is formed at the bottom of the valve core support platform 15. This annular stepped surface covers a portion of the lower end surface of the valve core 4, effectively preventing the valve core 4 from falling out of 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. This allows the annular groove to provide space for the valve core 4 to move up and down when the buffer spring 8 is compressed.

[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 or other methods.

[0030] Furthermore, a guide seal ring 7 is provided between the valve core 4 and the throttling cone 2 , which 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 can be provided on the bottom surface of the valve core 4, and an annular sealing gasket 6 is provided in the sealing gasket installation groove. The sealing gasket 6 is fixedly connected to the sealing gasket installation groove by interference fit or bonding to prevent it from falling off. The top surface of the valve seat 3 is also provided with an annular boss protruding upward, and the boss is located below the sealing gasket 6. When the throttle cone 2 moves downward, the sealing gasket 6 on the valve core 4 and the boss on the valve seat 3 first contact each other, and the two form a reliable seal. Compared with the integral planar 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 control, thereby improving the sealing reliability.

[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 the 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, which passes 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. During this process, the medium between the bottom of the annular groove and the upper surface of the valve core 4 can be smoothly discharged through this 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 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. 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, avoiding the problem of using two valves at the same time to achieve the regulation and opening and closing functions, thereby simplifying the structure and meeting the needs of continuous optimization of the aerospace engine system.

[0038] In the foregoing 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 embodiments of the claimed subject matter require more features than are expressly recited in each claim. On the contrary, as reflected in the appended claims, the invention comprises less than all the features of any individual disclosed embodiment. 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 above description of the disclosed embodiments is intended to enable any person skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may 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 presented herein but is intended to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[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) with a cavity (12) provided therein, 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), wherein the bottom surface of the valve core (4) is perpendicular to the axis of the throttling cone (2); An inlet end is fixedly connected to the side of the adjustable cavitation tube valve body (1), and the inlet end is communicated with 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 the lower end of the throttling cone (2) is provided with a conical structure, and a throttling platform (13) is provided inside 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; A valve seat (3) is 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 throttle platform (13) and the through hole; The throttling cone (2) can move along the axial direction of the adjustable cavitation tube valve body (1); The closable adjustable cavitation tube also includes a valve core support platform (15) connected to the outside of the throttling cone (2), and an annular groove is provided at the bottom of the valve core support platform (15). 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.

2. The closable and adjustable cavitation tube according to claim 1, characterized in that: The valve core support platform (15) and the throttling cone (2) form an integrated structure.

3. The closable and adjustable cavitation tube according to claim 1, characterized in that: A guide sealing ring (7) is also provided between the valve core (4) and the throttling cone (2).

4. The closable and adjustable cavitation tube according to claim 1, 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.

5. The closable and adjustable cavitation tube according to claim 1, characterized in that: The top surface of the valve seat (3) is also provided with an annular conical platform protruding upward, 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.

6. The closable and adjustable cavitation tube according to claim 1, characterized in that: The buffer spring (8) is a cylindrical spring or a butterfly spring.

7. The closable and adjustable cavitation tube according to claim 1, characterized in that: The valve core support platform (15) is also provided with an air vent, and the air vent passes through the upper surface of the valve core support platform (15) and the bottom of the annular groove.

8. 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).

9. An aerospace engine system, characterized in that: The invention comprises a closable and adjustable cavitation tube as described in any one of claims 1 to 8.

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