Electromagnetic drive low-temperature adjustable cavitation venturi tube
By using electromagnetically driven low-temperature adjustable cavitation venturi tubes in adjustable cavitation venturi tubes, the flow rate is adjusted using magnetic parts and coil-driven needle cone parts to slide, the problem of poor sealing effect is solved and efficient liquids are achieved Flow regulation and simplified sealing structure for easy low-temperature use and maintenance.
Patent Information
- Application Number
- CN202421036200.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-13
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-05-13
AI Technical Summary
The existing adjustable cavitation venturi tube has poor sealing effect, resulting in liquid leakage and complex sealing structure.
The low-temperature adjustable cavitation venturi tube is adopted with electromagnetic drive. By installing magnetic parts and electric coils in the tube body, the needle cone is driven to slide to adjust the flow rate, avoiding the dynamic sealing structure, improving sealing properties and simplifying the sealing structure.
The liquid flow adjustment under low temperature conditions is achieved, the sealing effect is improved, the use of springs and energy storage rings is avoided, the structure is simplified, and the maintenance is facilitated.
Smart Images
Figure CN222184951U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flow regulating devices, in particular to an electromagnetically driven low-temperature adjustable cavitation venturi. Background Art
[0002] The cavitation venturi is a structure that contracts first and then expands. When the inlet pressure and outlet pressure of the cavitation venturi differ to a certain extent, the liquid cavitation occurs in the throat and the liquid flow is blocked. When the cavitation venturi is in the cavitation blockage state, the flow rate depends only on the upstream pressure and the throat flow area, and will not be affected by the downstream pressure.
[0003] The adjustable cavitation venturi is composed of a movable cone or a needle cone with a specific profile installed at the center of the throat of the cavitation venturi. The needle cone of the adjustable cavitation venturi moves linearly, thereby changing the cross-sectional area between the throat of the cavitation venturi and the needle cone, thereby achieving the purpose of regulating the flow. The adjustable cavitation venturi can be used in various scenarios that require liquid flow regulation and delivery, such as solid-liquid rocket engine propellant supply, gas turbine fuel supply, and rocket engine test bench propellant supply.
[0004] However, usually the adjustable cavitation venturi uses a motor screw or an electric cylinder to drive the needle cone to move. The needle cone needs to pass through the housing to be connected to the motor screw or the electric cylinder. The part where the needle cone passes through the housing needs to be sealed to prevent liquid leakage. At the same time, the needle cone needs to move, so this part usually needs to use a dynamic sealing structure such as a spring energy storage ring. The sealing structure is complex and the sealing effect is poor. Utility Model Content
[0005] Therefore, the technical problem to be solved by the utility model is to overcome the defect of poor sealing effect of the adjustable cavitation venturi in the prior art, thereby providing an electromagnetically driven low-temperature adjustable cavitation venturi.
[0006] In order to solve the above technical problems, the utility model provides an electromagnetically driven low-temperature adjustable cavitation venturi, comprising:
[0007] The tube body has an inlet cavity, a contraction cavity and an expansion cavity arranged in sequence inside, and an end of the contraction cavity with a smaller inner diameter is connected to an end of the expansion cavity with a smaller inner diameter;
[0008] An adjusting member is slidably installed in the tube body, one end of the adjusting member is connected to the magnetic member, and the other end is connected to the needle-cone member, a first energized coil and a second energized coil are sleeved on the magnetic member, the first energized coil and the second energized coil are axially spaced apart, the first energized coil and the second energized coil are suitable for respectively applying magnetic forces in opposite directions to the magnetic member, so as to drive the adjusting member to drive the needle-cone member to slide toward or away from the expansion cavity.
[0009] Optionally, the tube body includes a fluid input tube and a fluid output tube, the inlet cavity is arranged in the fluid input tube, the contraction cavity and the expansion cavity are both arranged in the fluid output tube, and the fluid input tube and the fluid output tube are sealed and connected.
[0010] Optionally, a side wall of the fluid input pipe is connected to a fluid inlet pipe.
[0011] Optionally, the tube body further includes an adjusting tube, which is connected to the fluid output tube at both ends of the fluid input tube respectively, and is sealed to the fluid input tube, and the magnetic piece, the first energized coil and the second energized coil are all installed in the adjusting tube.
[0012] Optionally, a packaging blind plate is sealed and installed at one end of the regulating tube away from the fluid input tube.
[0013] Optionally, a guide member is installed in the adjusting tube and / or the fluid input tube, and the adjusting member is slidably installed on the guide member.
[0014] Optionally, the two first wiring terminals of the first energized coil both penetrate the side wall of the tube body, and the first wiring terminals both seal and cooperate with the tube body;
[0015] And / or, both second wiring terminals of the second energized coil penetrate the side wall of the tube body, and both second wiring terminals are sealed with the tube body.
[0016] Optionally, the adjusting member is an adjusting rod, and the adjusting rod is coaxially mounted with the pipe body.
[0017] Optionally, both the contraction cavity and the expansion cavity are tapered and evenly transitioned, and the length of the contraction cavity is smaller than the length of the expansion cavity.
[0018] Optionally, the inner diameter of the inlet cavity is not less than the inner diameter of the contraction cavity.
[0019] The technical solution of the utility model has the following advantages:
[0020] 1. The electromagnetically driven low-temperature adjustable cavitation venturi provided by the utility model comprises: a tube body, the interior of which is sequentially arranged as an inlet chamber, a contraction chamber and an expansion chamber, the end of the contraction chamber with a smaller inner diameter is connected to the end of the expansion chamber with a smaller inner diameter; an adjusting member, which is slidably mounted in the tube body, one end of the adjusting member is connected to a magnetic member, and the other end is connected to a needle-cone member, a first energized coil and a second energized coil are sleeved on the magnetic member, and the first energized coil and the second energized coil are spaced apart in the axial direction. The first energized coil and the second energized coil are respectively suitable for applying magnetic forces in opposite directions to the magnetic member, so as to drive the adjusting member to drive the needle-cone member to slide toward or away from the expansion chamber, thereby changing the distance between the needle-cone member and the minimum inner diameter of the contraction chamber, and then adjusting the flow area of the contraction chamber, so as to achieve liquid flow regulation. During the flow regulation process, the first energized coil and the second energized coil cooperate with the magnetic member to adjust the position of the needle cone member. In the adjustable cavitation venturi, the needle cone member and the adjusting member are both arranged inside the tube body, and there is no need to set a dynamic sealing structure, which improves the sealing performance of the adjustable cavitation venturi and makes the sealing structure simple. At the same time, since there are no springs and spring energy storage coils and other structures inside the electromagnetically driven low-temperature adjustable cavitation venturi, the first energized coil, the second energized coil and the magnetic member used for flow regulation control will not cause the equipment to lose function due to low temperature, so that the electromagnetically driven low-temperature adjustable cavitation venturi can be used under low temperature conditions.
[0021] 2. The electromagnetically driven low-temperature adjustable cavitation venturi provided by the utility model comprises a tube body including a fluid input tube and a fluid output tube, an inlet chamber is arranged in the fluid input tube, a contraction chamber and an expansion chamber are arranged in the fluid input tube, and the fluid input tube and the fluid output tube are sealed and connected. By setting the tube body as a split structure, it is convenient to assemble the first energized coil, the second energized coil and the adjustment member and other structures in the tube body. At the same time, when the electromagnetically driven low-temperature adjustable cavitation venturi is used for a long time, the fluid output tube will be damaged by cavitation. By setting the tube body as a split fluid input tube and fluid output tube, it is convenient to replace the fluid output tube and facilitate equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0023] Figure 1 It is a schematic diagram of the internal structure of the electromagnetically driven low-temperature adjustable cavitation venturi provided in the embodiment of the utility model.
[0024] Figure 2It is a schematic structural diagram of an electromagnetically driven low-temperature adjustable cavitation venturi provided in an embodiment of the utility model.
[0025] Explanation of the accompanying drawings: 1. Tube body; 2. Inlet cavity; 3. Contraction cavity; 4. Expansion cavity; 5. Adjustment member; 6. Magnetic member; 7. Needle cone member; 8. First energized coil; 9. Second energized coil; 10. Fluid input pipe; 11. Fluid output pipe; 12. Fluid inlet pipe; 13. Adjustment pipe; 14. Packaging blind plate; 15. Guide member; 16. First terminal; 17. Second terminal; 18. Limit block. DETAILED DESCRIPTION
[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0029] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0030] Figure 1 and Figure 2As shown, an electromagnetically driven low-temperature adjustable cavitation venturi provided in this embodiment includes a tube body 1 and an adjusting member 5 slidably mounted inside the tube body 1 for adjusting the flow rate. In this embodiment, the adjusting member 5 is an adjusting rod coaxially mounted with the tube body 1. In some other embodiments, the adjusting member 5 can also be a sliding block, a sliding plate or the like slidably mounted inside the tube body 1.
[0031] The interior of the tube body 1 is sequentially provided with an inlet chamber 2, a contraction chamber 3 and an expansion chamber 4, and the end of the contraction chamber with a smaller inner diameter is connected to the end of the expansion chamber 4 with a smaller inner diameter. Specifically, the tube body 1 includes a fluid input pipe 10 and a fluid output pipe 11, the inlet chamber 2 is provided in the fluid input pipe 10, the contraction chamber 3 and the expansion chamber 4 are both provided in the fluid output pipe 11, and the fluid input pipe 10 and the fluid output pipe 11 are sealedly connected. A fluid inlet pipe 12 is connected to the side wall of the fluid input pipe 10, and the fluid inlet pipe 12 and the fluid input pipe 10 are integrally formed to form a three-way structure. The tube body 1 also includes an adjustment pipe 13, which is connected to the fluid input pipe 10 at both ends of the fluid input pipe 10 respectively, and the adjustment pipe 13 and the fluid output pipe 11 are sealedly connected, and the magnetic member 6, the first energized coil 8 and the second energized coil 9 are all installed in the adjustment pipe 13.
[0032] The end of the regulating tube 13 facing away from the fluid input tube 10 is sealed with a packaging blind plate 14, and the packaging blind plate 14 forms a static seal with the regulating tube 13. A guide plate as a guide member 15 is installed in the regulating tube 13 and the fluid input tube 10, and a guide hole is provided on the guide plate. The regulating rod as the regulating member 5 is slidably installed in the guide hole of the guide member 15. A limit block 18 is provided on the guide member between the two guide members 15, and the limit block 18 limits the sliding area of the regulating member 5 in the axial direction by abutting and cooperating with the two guide members 15.
[0033] One end of the adjusting member 5 is connected to a permanent magnet as the magnetic member 6, and the other end is connected to a needle-cone member 7. A first energized coil 8 and a second energized coil 9 are sleeved on the magnetic member 6. The first energized coil 8 and the second energized coil 9 are spaced apart in the axial direction. The first energized coil 8 and the second energized coil 9 are suitable for applying magnetic forces in opposite directions to the magnetic member 6, respectively, so as to drive the adjusting member 5 to drive the needle-cone member 7 to slide toward or away from the expansion cavity 4. In this embodiment, in order to enable the needle-cone member 7 to completely close the contraction cavity 3, the maximum inner diameter of the needle-cone member 7 is not less than the minimum inner diameter of the contraction cavity 3. In some other embodiments, the maximum inner diameter of the needle-cone member 7 may also be less than the minimum inner diameter of the contraction cavity 3, so that the minimum value of the flow rate of the fluid adjusted by the needle-cone member 7 and the contraction cavity 3 is not zero.
[0034] The two first terminals 16 of the first energized coil 8 both penetrate the side wall of the tube body 1, and the first terminals 16 are sealed with the tube body 1 by welding. The two second terminals 17 of the second energized coil 9 both penetrate the side wall of the tube body 1, and the second terminals 17 are sealed with the tube body 1 by welding. In some other embodiments, the first terminal 16 and the second terminal 17 are sealed with the tube body by means of threaded connection or the like. When the electromagnetically driven low-temperature adjustable cavitation venturi is working, the current on the first energized coil 8 and the second energized coil 9 is adjusted by connecting the first terminal 16 and the second terminal 17 to the control circuit respectively. The contraction chamber 3 and the expansion chamber 4 both have a conical uniform transition, and the length of the contraction chamber 3 is less than the length of the expansion chamber 4. The inner diameter of the inlet chamber 2 is not less than the inner diameter of the contraction chamber 3.
[0035] In the electromagnetic driven low temperature adjustable cavitation venturi, the permanent magnet and the needle cone 7 are connected to the two ends of the regulating rod respectively, the regulating rod and the needle cone 7 are integrally formed, the permanent magnet at the tail of the regulating rod is placed between the first energized coil 8 and the second energized coil 9 arranged at intervals, the first energized coil 8 and the second energized coil 9 are wound in opposite directions or have opposite current directions, and generate opposite magnetic fields after being energized, and generate opposite magnetic forces on the permanent magnets. When the current magnitudes of the first energized coil 8 and the second energized coil 9 are different, the magnitudes of the magnetic forces generated on the permanent magnets are different, and the driving permanent magnet drives the regulating rod to drive the needle cone 7 to move. When the needle cone 7 moves to a certain position, the magnetic forces generated by the first energized coil 8 and the second energized coil 9 on the permanent magnet are balanced, and then the needle cone 7 stops moving, achieving the purpose of using electromagnetic force to drive the needle cone 7 to move. When the flow rate is adjusted, the current magnitudes in the first energized coil 8 and the second energized coil 9 are changed to thereby change the relative position of the needle cone 7 and the contraction cavity, and then the flow area of the throat position in the tube body 1 is changed, thereby achieving liquid flow adjustment. In the adjustable cavitation venturi, the needle cone member 7 and the adjusting member 5 are both arranged inside the tube body 1, and there is no need to set a dynamic sealing structure, which improves the sealing performance of the adjustable cavitation venturi and makes the sealing structure simple. At the same time, no deformation structure such as a spring is set in the tube body 1, so that the adjustable cavitation venturi can be used in a low temperature state, and a low temperature liquid can be passed into it.
[0036] As an alternative embodiment, the tube body is an integrally formed structure, and the tail of the tube body is statically sealed by a packaging blind plate.
[0037] As an alternative implementation, the packaging blind plate is connected to an exhaust pipe, and a switch valve is installed on the exhaust pipe to control the on-off of the exhaust pipe. When a super-low-temperature liquid is passed into the electromagnetically driven low-temperature adjustable cavitation venturi, the super-low-temperature liquid is pre-cooled and vaporized and needs to be exhausted. The exhaust is controlled by adding an exhaust pipe and a switch valve.
[0038] As an alternative implementation, the guide member is a straight-line, cross-shaped or other shaped guide frame, and a guide hole is reserved in the middle of the guide frame for the adjustment rod to pass through and guide the adjustment rod.
[0039] As an alternative embodiment, the end face of the needle-cone member 7 is conical, hemispherical, parabolic, ellipsoidal or any other shape, each shape corresponds to a flow rate adjustment curve, and the shape of the end face of the needle-cone member can be selected as a suitable shape according to actual application requirements.
[0040] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.
Claims
1. An electromagnetically driven low temperature adjustable cavitation venturi, It is characterized in that include: A tube body (1) is provided with an inlet chamber (2), a contraction chamber (3) and an expansion chamber (4) in sequence therein, wherein an end of the contraction chamber with a smaller inner diameter is connected to an end of the expansion chamber (4) with a smaller inner diameter; An adjusting member (5) is slidably mounted in the tube body (1); one end of the adjusting member (5) is connected to a magnetic member (6) and the other end is connected to a needle cone member (7); a first energized coil (8) and a second energized coil (9) are sleeved on the magnetic member (6); the first energized coil (8) and the second energized coil (9) are spaced apart in the axial direction; the first energized coil (8) and the second energized coil (9) are suitable for respectively applying magnetic forces in opposite directions to the magnetic member (6) to drive the adjusting member (5) to drive the needle cone member (7) to slide toward or away from the expansion cavity (4).
2. The electromagnetic driven low temperature adjustable cavitation venturi according to claim 1, It is characterized in that The tube body (1) comprises a fluid input tube (10) and a fluid output tube (11); the inlet chamber (2) is arranged in the fluid input tube (10); the contraction chamber (3) and the expansion chamber (4) are both arranged in the fluid output tube (11); and the fluid input tube (10) and the fluid output tube (11) are sealed and connected.
3. The electromagnetic driven low temperature adjustable cavitation venturi according to claim 2, It is characterized in that The side wall of the fluid input pipe (10) is connected to a fluid inlet pipe (12).
4. The electromagnetic driven low temperature adjustable cavitation venturi according to claim 2 or 3, It is characterized in that The tube body (1) further comprises an adjusting tube (13), wherein the adjusting tube (13) and the fluid output tube (11) are respectively connected to the two ends of the fluid input tube (10), the adjusting tube (13) and the fluid input tube (10) are sealedly connected, and the magnetic member (6), the first energized coil (8) and the second energized coil (9) are all installed in the adjusting tube (13).
5. The electromagnetic driven low temperature adjustable cavitation venturi according to claim 4, It is characterized in that A packaging blind plate (14) is sealed and installed on one end of the regulating tube (13) that is away from the fluid input tube (10).
6. The electromagnetic driven low temperature adjustable cavitation venturi according to claim 4, It is characterized in that A guide member (15) is installed in the regulating tube (13) and / or the fluid input tube (10), and the regulating member (5) is slidably installed on the guide member (15).
7. The electromagnetic driven low temperature adjustable cavitation venturi according to any one of claims 1 to 3, It is characterized in that The two first connection terminals (16) of the first energized coil (8) both penetrate the side wall of the tube body (1), and the first connection terminals (16) are both sealed and matched with the tube body (1); And / or, the two second connection terminals (17) of the second energized coil (9) both penetrate the side wall of the tube body (1), and the two second connection terminals (17) are both sealed and matched with the tube body (1).
8. The electromagnetic driven low temperature adjustable cavitation venturi according to any one of claims 1 to 3, It is characterized in that The adjusting member (5) is an adjusting rod, and the adjusting rod is coaxially mounted with the pipe body (1).
9. The electromagnetic driven low temperature adjustable cavitation venturi according to any one of claims 1 to 3, It is characterized in that The contraction cavity (3) and the expansion cavity (4) both present a conical uniform transition, and the length of the contraction cavity (3) is shorter than the length of the expansion cavity (4).
10. The electromagnetic driven low temperature adjustable cavitation venturi according to any one of claims 1 to 3, It is characterized in that The inner diameter of the inlet chamber (2) is not less than the inner diameter of the contraction chamber (3).