Flow regulating valve based on venturi structure and using method

Abstract

The invention provides a flow regulating valve based on a venturi structure and a using method, an adjusting ring is rotatably arranged between a front shell and a rear shell, a flow guide screw rod is arranged in the front shell and / or the rear shell, and the flow guide screw rod is matched with the adjusting ring through a transmission thread; the adjustable motor is arranged outside the front shell and / or the rear shell and drives the adjusting ring to rotate through the transmission assembly. The flow guide screw comprises a conical section, a conical hole is formed in the front shell or the rear shell where the main body part of the flow guide screw is located, and the conical section part is located in the conical hole and forms a circulation gap; the flow guide screw moves in the axial direction, and the flow area of the conical hole is changed. By combining the venturi tube structure with the flow stabilizing function and the variable flow area structure with the stepless flow adjusting function, the thrust of the solid-liquid mixing engine can be changed, meanwhile, the stability and accuracy of the thrust of the solid-liquid mixing engine are guaranteed, and the technical problem that the thrust of the solid-liquid mixing engine is continuously, stably and accurately adjusted is solved.

Description

Technical Field

[0001] This invention belongs to the field of solid-liquid hybrid propulsion systems in aerospace, specifically relating to a flow regulating valve based on a venturi structure and its usage method. Background Technology

[0002] Hybrid rocket engines are a new type of propulsion system that combines the advantages of solid and liquid rocket engines. Compared with traditional solid and liquid rocket engines, hybrid rocket engines have significant advantages in terms of safety, cost-effectiveness, and reusability.

[0003] The working principle of a hybrid rocket engine is to store solid fuel and liquid oxidizer separately, with the fuel only coming into contact with the oxidizer when the engine is actually ignited. By controlling the oxidizer flow rate, the engine's thrust and operating time can be precisely controlled. This design not only improves engine safety but also makes the engine more flexible and controllable during use. Therefore, oxidizer flow rate regulation technology is a crucial and important technology in hybrid rocket engines.

[0004] The mainstream flow regulation methods in solid-liquid hybrid engines include valve control and pump control. However, the current valve control method cannot guarantee continuous, stable, and accurate thrust regulation in solid-liquid hybrid engines, and there are areas for improvement. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a flow regulating valve based on a venturi structure and its usage method.

[0006] The flow regulating valve based on the Venturi structure provided by the present invention includes an adjustable motor, an adjusting ring, a front housing, a rear housing, and a flow guiding screw. The adjusting ring is rotatably disposed between the front housing and the rear housing, and the interiors of the front housing and the rear housing are connected. The flow guiding screw is disposed in the front housing and / or the rear housing, and the flow guiding screw moves axially in the front housing and / or the rear housing. The flow guiding screw and the adjusting ring are engaged by a transmission thread. The adjustable motor is located outside the front housing and / or rear housing, and the adjustable motor drives the adjusting ring to rotate through the transmission assembly; the guide screw includes a tapered section, and a tapered hole is formed in the front housing or rear housing where the main body of the guide screw is located, and the tapered section is located in the tapered hole and forms a flow gap; The flow area of ​​the tapered orifice is changed by the axial movement of the guide screw.

[0007] Preferably, the transmission assembly includes a motor gear and a transmission gear. The motor gear is connected to the output shaft of the motor, and the transmission gear is coaxially sleeved on the outside of the adjusting ring and connected to it. The transmission gear meshes with the motor gear.

[0008] Preferably, a connecting groove is provided on the inner wall of the transmission gear, and the connecting groove has openings at both ends along the axial direction of the motor gear; a connecting rod is provided on the outer wall of the adjusting ring. The transmission gear is coaxially fitted with an adjusting ring, and the connecting rod is embedded in the connecting groove.

[0009] Preferably, pressure rings are provided on both the upper and lower sides of the transmission gear; The mounting screws pass through the pressure ring, the drive gear, and the pressure ring in sequence from bottom to top or from top to bottom, and then fix the three together.

[0010] Preferably, both the end of the front housing near the rear housing and the end of the rear housing near the front housing are formed with flanges; A planar bearing is provided between the flange on the front housing and the pressure ring on the side away from the rear housing; A planar bearing is provided between the flange on the rear housing and the pressure ring on the side away from the front housing.

[0011] Preferably, a sealing groove is provided on the outer side wall of the adjusting ring that contacts the front housing and / or the rear housing, and a sealing ring is embedded in each of the sealing grooves.

[0012] Preferably, the transmission thread structure between the adjusting ring and the guide screw includes a rectangular thread structure or a trapezoidal thread structure.

[0013] Preferably, a limiting structure is provided between the flow guide screw and the front housing and / or the rear housing to ensure that the flow guide screw moves axially along the front housing and / or the rear housing; The limiting structure includes a curved groove and a curved protrusion, a curved groove and a spherical protrusion, a rectangular groove and a rectangular protrusion, and a rectangular groove and a spherical protrusion.

[0014] Preferably, both the end of the front housing away from the rear housing and the end of the rear housing away from the front housing are provided with transition flanges.

[0015] The method of using the flow regulating valve based on the Venturi structure provided by the present invention includes the following steps: The adjustable motor receives commands and rotates in a fixed quantity. The adjustable motor rotates, driving the adjusting ring to rotate via a transmission assembly. When the regulating ring rotates, it converts the rotational motion into linear movement of the guide screw relative to the front housing through its internal transmission thread; The linear movement of the guide screw relative to the front housing is transformed into different flow areas through its internal conical structure, thereby achieving flow regulation.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention combines a Venturi tube structure with a flow stabilizing function with a variable flow area structure with stepless flow regulation function, so that the solid-liquid hybrid engine can ensure the stability and accuracy of the thrust while having variable thrust, thus solving the technical problem of continuous, stable and accurate thrust regulation of solid-liquid hybrid engines.

[0017] 2. This invention greatly improves the compactness of the valve structure through gear transmission, thread transmission and other methods, and further enhances the system compactness of the solid-liquid hybrid engine. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a cross-sectional view that mainly illustrates the overall structure of the flow regulating valve in this invention; Figure 2 This is a schematic diagram illustrating the overall structure of the regulating ring, which is the main feature of this invention. Figure 3 This is a schematic diagram illustrating the overall structure of the front housing of the present invention; Figure 4 This is a schematic diagram illustrating the overall structure of the flow guide screw, which is the main feature of this invention. Figure 5 This is a schematic diagram illustrating the overall structure of the flow regulating valve, which is the main feature of this invention.

[0019] Reference numerals in the attached drawings: 1. Adjustable motor; 2. Motor bracket; 3. Motor gear; 4. Adjusting ring; 5. Sealing ring; 6. Surface bearing; 7. Front housing; 8. Rear housing; 9. Transmission gear; 10. Guide screw; 11. Pressure ring; 12. Adapter flange; 13. Sealing gasket. Detailed Implementation

[0020] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0021] like Figures 1 to 5As shown, the flow regulating valve based on a venturi structure according to the present invention includes an adjustable motor 1, an adjusting ring 4, a front housing 7, a rear housing 8, and a guide screw 10. The adjusting ring 4 is rotatably disposed between the front housing 7 and the rear housing 8, and the interiors of the front housing 7 and the rear housing 8 are connected. The guide screw 10 is disposed within the front housing 7 and / or the rear housing 8, and the guide screw 10 moves axially within the front housing 7 and / or the rear housing 8. The guide screw 10 and the adjusting ring 4 are engaged by a transmission thread. The adjustable motor 1 is disposed outside the front housing 7 and / or the rear housing 8, and the adjustable motor 1 drives the adjusting ring 4 to rotate through a transmission assembly.

[0022] The flow guide screw 10 includes a tapered section. A tapered hole is formed within the front housing 7 or rear housing 8, where the main body of the flow guide screw 10 is located. The tapered section is located within the tapered hole and forms a flow gap. By moving the flow guide screw 10 axially, the flow area of ​​the tapered hole is changed.

[0023] This application's technical solution innovatively combines a Venturi tube structure with a flow-stabilizing function with a variable flow area structure for stepless flow regulation in the valve control method. This allows the solid-liquid hybrid engine to maintain the stability and accuracy of its thrust while achieving variable thrust, solving the technical challenge of continuous, stable, and accurate thrust adjustment in solid-liquid hybrid engines. Furthermore, this invention significantly improves the compactness of the valve structure through gear transmission and threaded transmission, further enhancing the overall system compactness of the solid-liquid hybrid engine.

[0024] Specifically, a motor bracket 2 is fixedly mounted on the outer wall of the front housing 7 using mounting screws, and the adjustable motor 1 is fixedly mounted on the motor bracket 2 using mounting screws. The transmission assembly includes a motor gear 3 and a transmission gear 9. The motor gear 3 is connected to the output shaft of the motor via a coupling, and the transmission gear 9 is coaxially sleeved on the outside of the adjusting ring 4 and connected to it, meshing with the motor gear 3. The adjustable motor 1 in this application can be a stepper motor or a servo motor.

[0025] In one feasible embodiment, the transmission gear 9 and the adjusting ring 4 are connected as follows: a connecting groove is provided on the inner wall of the transmission gear 9, and openings are formed at both ends of the connecting groove along the axial direction of the motor gear 3. A connecting rod is provided on the outer wall of the adjusting ring 4. The transmission gear 9 is coaxially fitted with the adjusting ring 4, and the connecting rod is embedded in the connecting groove. During installation, the transmission gear 9 is coaxially fitted on the outside of the adjusting ring 4, and the connecting rod can enter the connecting groove from the opening above or below, so that the transmission gear 9 and the adjusting ring 4 will not produce radial and axial relative movement. Preferably, four sets of connecting rods and connecting grooves are equally spaced around the circumference of the adjusting ring 4, which improves the balance of force transmission.

[0026] More specifically, pressure rings 11 are provided on both the upper and lower sides of the transmission gear 9. Mounting screws pass through the pressure rings 11, transmission gear 9, and pressure rings 11 sequentially from bottom to top or top to bottom, fixing the three together. Flanges are formed at the ends of the front housing 7 and rear housing 8 near the rear housing 8. A planar bearing 6 is provided between the side of the flange on the front housing 7 away from the rear housing 8 and the pressure ring 11. A planar bearing 6 is also provided between the side of the flange on the housing away from the front housing 7 and the pressure ring 11. The pressure rings 11 on both sides, in conjunction with the mounting screws, connect the transmission gear 9 to the transmission gear 9 as a whole, and the mounting screws connecting the transmission gear 9 and the pressure rings 11 do not interfere with the connecting rod or connecting groove. Furthermore, the flange structure and the planar bearing 6 achieve, on the one hand, the upper and lower housings are press-fitted together, and on the other hand, ensure the rotational engagement of the transmission gear 9 and the adjusting ring 4 with the front housing 7 and the rear housing 8. In a preferred embodiment, the planar bearing 6 includes a planar thrust ball bearing and a planar thrust roller bearing.

[0027] More specifically, the outer side wall of the adjusting ring 4 that contacts the front housing 7 and / or the rear housing 8 is provided with a sealing groove, and a sealing ring 5 is embedded in each sealing groove. The materials of the sealing ring 5 include perfluoroether rubber, polyvinylidene fluoride rubber, and EPDM rubber.

[0028] More specifically, the transmission thread structure between the adjusting ring 4 and the guide screw 10 includes a rectangular thread structure or a trapezoidal thread structure. A limiting structure is provided between the guide screw 10 and the front housing 7 and / or the rear housing 8 to ensure that the guide screw 10 moves axially along the front housing 7 and / or the rear housing 8. The limiting structure includes a curved groove and a curved protrusion fit, a curved groove and a spherical protrusion fit, a rectangular groove and a rectangular protrusion fit, and a rectangular groove and a spherical protrusion fit. This ensures that the guide screw 10 can only move axially along the front housing 7.

[0029] A transition flange 12 is provided at the end of the front housing 7 away from the rear housing 8, and at the end of the rear housing 8 away from the front housing 7. A sealing gasket 13 is placed between the transition flange 12 and the front housing 7 and the rear housing 8 and fixed by mounting screws.

[0030] It should be further explained that the guide screw 10 in the technical solution of this application includes a transmission thread section that is threadedly engaged with the adjusting ring 4, and also includes a cavity section. The cavity section has a port that communicates with the opening of the front housing 7 adapter flange 12, and the cavity section also has a side opening that communicates with the inner cavity of the front housing 7.

[0031] The method of using the flow regulating valve based on the Venturi structure provided by the present invention includes the following steps: Adjustable motor 1 receives instructions to rotate in a fixed quantity.

[0032] The adjustable motor 1 rotates, driving the adjusting ring 4 to rotate via the transmission assembly. Specifically, the rotation of the adjustable motor 1 drives the motor gear 3 to rotate, which in turn drives the transmission gear 9 to mesh and transmit power. The transmission gear 9 then drives the adjusting ring 4 to rotate via its internal transmission groove.

[0033] When the adjusting ring 4 rotates, its internal transmission thread converts the rotational motion into linear movement of the guide screw 10 relative to the front housing 7. The special limiting structure between the guide screw 10 and the front housing 7 ensures that the guide screw 10 will not rotate with the adjusting ring 4.

[0034] The linear movement of the guide screw 10 relative to the front housing 7 is transformed into different flow areas through its internal conical structure, thereby achieving flow regulation.

[0035] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0036] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A flow regulating valve based on a venturi structure, characterized in that, Includes an adjustable motor (1), an adjusting ring (4), a front housing (7), a rear housing (8), and a guide screw (10). The adjusting ring (4) is rotatably disposed between the front housing (7) and the rear housing (8). The front housing (7) and the rear housing (8) are internally connected. The guide screw (10) is disposed in the front housing (7) and / or the rear housing (8), and the guide screw (10) moves axially in the front housing (7) and / or the rear housing (8). The guide screw (10) and the adjusting ring (4) are engaged by a transmission thread. The adjustable motor (1) is located outside the front housing (7) and / or the rear housing (8), and the adjustable motor (1) drives the adjusting ring (4) to rotate through the transmission assembly; the guide screw (10) includes a tapered section, and a tapered hole is formed in the front housing (7) or the rear housing (8) where the main body of the guide screw (10) is located, and the tapered section is located in the tapered hole and forms a flow gap; The flow area of ​​the tapered hole is changed by the axial movement of the guide screw (10).

2. The flow regulating valve based on a venturi structure according to claim 1, characterized in that, The transmission assembly includes a motor gear (3) and a transmission gear (9). The motor gear (3) is connected to the output shaft of the motor. The transmission gear (9) is coaxially sleeved on the outside of the adjusting ring (4) and connected to it. The transmission gear (9) meshes with the motor gear (3).

3. The flow regulating valve based on a venturi structure according to claim 2, characterized in that, The inner wall of the transmission gear (9) is provided with a connecting groove, and both ends of the connecting groove along the axial direction of the motor gear (3) are formed with openings. The outer wall of the adjusting ring (4) is provided with a connecting rod. The transmission gear (9) is coaxially fitted with an adjusting ring (4), and the connecting rod is embedded in the connecting groove.

4. The flow regulating valve based on a venturi structure according to claim 3, characterized in that, Pressure rings (11) are provided on both the upper and lower sides of the transmission gear (9). The mounting screws pass through the pressure ring (11), the transmission gear (9), and the pressure ring (11) sequentially from bottom to top or from top to bottom, and fix the three together.

5. The flow regulating valve based on a venturi structure according to claim 3, characterized in that, The front housing (7) near the end of the rear housing (8) and the rear housing (8) near the end of the front housing (7) are both provided with flanges; A planar bearing (6) is provided between the flange on the front housing (7) away from the side of the rear housing (8) and the pressure ring (11). A planar bearing (6) is provided between the flange on the rear housing (8) away from the side of the front housing (7) and the pressure ring (11).

6. The flow regulating valve based on a venturi structure according to claim 1, characterized in that, The adjusting ring (4) is provided with a sealing groove on the outer side wall that contacts the front housing (7) and / or the rear housing (8), and a sealing ring (5) is embedded in each of the sealing grooves.

7. The flow regulating valve based on a venturi structure according to claim 1, characterized in that, The transmission thread structure between the adjusting ring (4) and the guide screw (10) includes a rectangular thread structure or a trapezoidal thread structure.

8. The flow regulating valve based on a venturi structure according to claim 1, characterized in that, A limiting structure is provided between the flow guide screw (10) and the front housing (7) and / or the rear housing (8) to ensure that the flow guide screw (10) moves along the axial direction of the front housing (7) and / or the rear housing (8); The limiting structure includes a curved groove and a curved protrusion, a curved groove and a spherical protrusion, a rectangular groove and a rectangular protrusion, and a rectangular groove and a spherical protrusion.

9. The flow regulating valve based on a venturi structure according to claim 1, characterized in that, The front housing (7) and the rear housing (8) are both provided with transition flanges (12) at the ends of the front housing (7) and the rear housing (8) and the front housing (7).

10. A method of using a flow regulating valve based on a venturi structure, characterized in that, The method of using the flow regulating valve based on the Venturi structure as described in any one of claims 1 to 9 includes the following steps: The adjustable motor (1) receives instructions to rotate in a fixed quantity; The adjustable motor (1) rotates, driving the adjusting ring (4) to rotate through the transmission assembly; When the regulating ring (4) rotates, it converts the rotational motion into linear movement of the guide screw (10) relative to the front housing (7) through the internal transmission thread; The linear movement of the guide screw (10) relative to the front housing (7) is transformed into different flow areas through its internal conical structure, thereby achieving flow regulation.

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