Fluidic valve oscillator

Abstract

The application belongs to the field of oscillators, and particularly relates to a jet flow valve rotating oscillator, which rotates a flow blocking valve in a working cavity, relies on the fluid itself to push the flow blocking valve to rotate, can achieve that the jet flow passing through the flow blocking valve forms jet flows which are in a state of increase and decrease and dynamically change in an upper cavity and a lower cavity, the change of the jet flow in turn pushes the flow blocking valve to rotate back and forth, and further continuously changes the flow area of an outlet hole and controls the opening and closing of an upper feedback channel and a lower feedback channel, under the joint action of the upper feedback channel, the lower feedback channel and the flow blocking valve, periodic fluid oscillation is self-excited, the oscillation amplitude is obviously increased, and mechanical oscillation effect is achieved, which is beneficial to realize multi-dimensional composite vibration of a pipe column system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oscillators, in particular to a fluidic valve oscillation device. BACKGROUND

[0002] Fluidic oscillators are devices that produce continuous oscillations using fluidic interactions, unlike traditional mechanical moving parts. They have excellent scalability and integration, and can work in a wide range of frequencies from several hertz to tens of thousands of hertz. In addition, fluidic oscillators also show advantages in stable operation in harsh environments and their inherent oscillation characteristics. In the past few decades, fluidic oscillators have achieved wide success in the fields of flow control, separation control, downhole cleaning, downhole oscillation and fluidic impact.

[0003] The existing fluidic oscillation device mainly relies on the wall attachment principle to achieve it. Based on the Coanda effect, when fluid of a certain pressure enters the mixing chamber of the fluidic oscillator, the main flow will selectively adhere to the wall on one side. Subsequently, the main flow is divided into two paths along the wall: one forms a vortex flow, and the other part returns to the starting point of the main flow along the feedback channel, pushing the deflection of the main flow. This causes the vortex flow in the working chamber to dissipate and be discharged from the outlet, while forming a vortex flow in the opposite direction again. At the same time, the remaining main flow enters the feedback channel on the same side and returns to the starting point of the main flow again, pushing the main flow to deflect again. This cycle continues, thereby forming a continuous oscillation effect. SUMMARY

[0004] The embodiment of the present application provides a fluidic valve oscillation device, which aims to increase the pulse amplitude of the fluid at the outlet and improve the oscillation effect.

[0005] To achieve the above-mentioned purpose, the present application provides a fluidic valve oscillation device, which comprises a base body, a cover plate and a flow blocking valve.

[0006] The base body and the cover plate form a flow inlet channel, a flow channel system and a working chamber in sequence;

[0007] The flow channel system comprises an upper branch flow channel, a lower branch flow channel, an upper feedback channel and a lower feedback channel, and the upper branch flow channel, the lower branch flow channel, the upper feedback channel and the lower feedback channel communicate with one end of the flow inlet channel and converge to form a branch flow port.

[0008] The flow blocking valve is arranged in the working cavity, and one side of the flow blocking valve facing the flow channel system and the cavity wall of the working cavity surround to form an upper cavity and a lower cavity; in the case of fluid flowing into the inlet channel, the flow blocking valve can reciprocate between an upper limit position, a middle position and a lower limit position; in the upper limit position, the upper branch flow channel and the upper feedback channel close to the working cavity are communicated through the upper cavity, and the lower branch flow channel close to the working cavity is communicated with the outlet hole through the lower cavity; in the middle position, the upper branch flow channel and part of the outlet hole are communicated through the upper cavity, and the lower branch flow channel and part of the outlet hole are communicated through the lower cavity; in the lower limit position, the lower branch flow channel and the lower feedback channel close to the working cavity are communicated through the lower cavity, and the upper branch flow channel close to the working cavity is communicated with the outlet hole through the upper cavity.

[0009] Optionally, the base body comprises a body and an upper flow guide, a lower flow guide and a flow distribution block arranged on the body, the body and the cover plate form an inlet channel and a cavity in communication with each other, the upper flow guide, the lower flow guide and the flow distribution block are located in the cavity and separate the cavity into a flow channel system and a working cavity;

[0010] The upper flow guide and the lower flow guide are symmetrically arranged about the axis of the inlet channel, the flow distribution block is located between the upper flow guide and the lower flow guide and is symmetric about the axis of the inlet channel, the upper flow guide and the flow distribution block form an upper branch flow channel, the lower flow guide and the flow distribution block form a lower branch flow channel, the upper flow guide and the inner wall of the cavity form an upper feedback channel, and the lower flow guide and the inner wall of the cavity form a lower feedback channel.

[0011] Optionally, the body, the upper flow guide, the lower flow guide and the flow distribution block are of an integrated structure.

[0012] Optionally, the circumferential outer side of the flow blocking valve comprises a first curved surface, a second curved surface and a third curved surface connected end to end, the curvature radius of the second curved surface and the curvature radius of the third curved surface are both smaller than the curvature radius of the first curved surface, the second curved surface and the third curved surface are circumscribed and have the same curvature radius, the second curved surface and the third curved surface are both inscribed in the first curved surface, the second curved surface and the cavity wall of the working cavity surround to form an upper cavity, the second curved surface and the cavity wall of the working cavity surround to form a lower cavity, the connection between the second curved surface and the first curved surface forms an upper flow blocking part, the connection between the second curved surface and the third curved surface forms a flow blocking part, and the connection between the third curved surface and the first curved surface forms a lower flow blocking part.

[0013] Optionally, during rotation of the flow blocking valve, the flow blocking part is always in close contact with the side of the flow dividing block close to the working chamber; during rotation of the flow blocking valve between the upper limit position and the intermediate position, the lower flow blocking part is always in close contact with the side of the lower flow guide close to the working chamber; when the flow blocking valve is in the intermediate position, the upper flow blocking part is in close contact with the side of the upper flow guide close to the working chamber, and the lower flow blocking part is in close contact with the side of the lower flow guide close to the working chamber; during rotation of the flow blocking valve between the intermediate position and the lower limit position, the upper flow blocking part is always in close contact with the side of the upper flow guide close to the working chamber.

[0014] Optionally, the side of the upper flow guide, the flow dividing block and the lower flow guide close to the working chamber are all curved surfaces.

[0015] Optionally, the flow outlet hole is a circular hole, and the side of the flow dividing block close to the working chamber is a curved surface tangent to the flow outlet hole.

[0016] Optionally, the inner wall of the working chamber towards the flow channel system includes an upper wall surface and a lower wall surface connected in sequence, the upper wall surface and the lower wall surface are symmetrically arranged about the axis of the flow inlet channel, the upper wall surface is in close contact with the flow blocking valve when the flow blocking valve is rotated to the upper limit position, and the lower wall surface is in close contact with the flow blocking valve when the flow blocking valve is rotated to the lower limit position.

[0017] Optionally, when the flow blocking valve is rotated to the upper limit position and the lower limit position, the flow outlet hole is completely communicated with the working chamber, after the flow blocking valve leaves the upper limit position and the lower limit position, the flow blocking valve blocks part of the flow outlet hole, and during movement of the flow blocking valve from the upper limit position to the intermediate position and from the lower limit position to the intermediate position, the part of the flow outlet hole blocked by the flow blocking valve gradually increases.

[0018] Optionally, the flow inlet channel includes a flow inlet hole and a speed increasing flow channel communicated with each other, the end of the speed increasing flow channel away from the flow inlet hole is communicated with the flow channel system, the opening area of the speed increasing flow channel is smaller than the opening area of the flow inlet hole, and a multi-stage speed increasing structure for increasing the speed of the fluid is arranged in the direction from the flow inlet hole to the speed increasing flow channel.

[0019] The jet flow valve oscillator provided by the application has the beneficial effects that, compared with the prior art, the jet flow valve oscillator provided by the application rotates the flow blocking valve in the working chamber, relies on the fluid to push the flow blocking valve to rotate, can form the jet flow that is in a state of this consuming that and the other growing and dynamically changes in the upper chamber and the lower chamber through the rotation of the jet flow passing through the flow blocking valve, the change of the jet flow in turn pushes the flow blocking valve to rotate back and forth, thereby continuously changes the flow passage area of the flow outlet hole and controls the opening and closing of the upper feedback channel and the lower feedback channel, and under the joint action of the upper feedback channel, the lower feedback channel and the flow blocking valve, periodic fluid oscillation can be generated, the oscillation amplitude is obviously increased, and the mechanical oscillation effect is achieved, which is beneficial to realize multi-dimensional composite vibration of the pipe string system. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0021] Wherein:

[0022] Figure 1 is a sectional view of the jet valve oscillator along the axis of the inflow channel according to an embodiment of the present application;

[0023] Figure 2 is a schematic view of the internal structure of the jet valve oscillator according to an embodiment of the present application;

[0024] Figure 3 is a schematic view of the structure of the flow blocking valve in the jet valve oscillator according to an embodiment of the present application;

[0025] Figure 4 is a schematic view of the internal structure of the flow blocking valve in the jet valve oscillator according to an embodiment of the present application when the flow blocking valve is in the upper limit position;

[0026] Figure 5 is a schematic view of the internal structure of the flow blocking valve in the jet valve oscillator according to an embodiment of the present application when the flow blocking valve is in the middle position;

[0027] Figure 6 is a schematic view of the internal structure of the flow blocking valve in the jet valve oscillator according to an embodiment of the present application when the flow blocking valve is in the lower limit position;

[0028] Figure 7 is a schematic view of the structure of the upper flow guide in the jet valve oscillator according to an embodiment of the present application;

[0029] Figure 8 is a schematic view of the internal structure of the flow blocking valve in another jet valve oscillator according to an embodiment of the present application when the flow blocking valve is in the lower limit position;

[0030] Figure 9 is a schematic view of the internal structure of the flow blocking valve in another jet valve oscillator according to an embodiment of the present application when the flow blocking valve is in the lower limit position.

[0031] Main element symbol explanation:

[0032] 100, cover plate;

[0033] 200, base body; 210, body; 220, upper flow guide; 221, fourth curved surface; 222, first flat surface; 223, fifth curved surface; 224, second flat surface; 230, lower flow guide; 240, flow dividing block;

[0034] 300, flow blocking valve; 3001, upper chamber; 3002, lower chamber; 3003, through hole; 301, first curved surface; 302, second curved surface; 303, third curved surface; 310, upper flow blocking part; 320, flow blocking part; 330, lower flow blocking part;

[0035] 400, rotating shaft;

[0036] 10, outflow hole;

[0037] 20, inflow passage; 21, inflow hole; 22, speed increasing flow passage;

[0038] 30, flow passage system; 31, upper sub-flow passage; 32, lower sub-flow passage; 33, upper feedback passage; 34, lower feedback passage;

[0039] 40, working chamber; 41, upper wall surface; 42, lower wall surface;

[0040] 50, sub-flow port;

[0041] 60, bolt hole. DETAILED DESCRIPTION

[0042] For the purpose of promoting an understanding of the present application, the present application will now be described in greater detail with reference to the figures. The preferred embodiments of the present application are illustrated in the figures. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the application to those skilled in the art.

[0043] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate relative positions or orientations based on the positions or orientations shown in the drawings, and are used only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0045] In addition, the terms "first", "second", "third", "fourth" are used only for descriptive purposes and should not be construed as indicating or implying relative importance or implying a number of the technical features indicated.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0047] It should also be noted that the same reference signs are used in all the drawings to denote same or similar parts or components throughout the present application. For the same components in the embodiments of the present application, only one of the components or parts may be labeled with a reference sign in the drawings, and it should be understood that the reference sign is applicable to other same components or parts as well.

[0048] According to an aspect of the present application, embodiments of the present application provide a fluidic valve oscillator, as shown in Figures 1-2 and Figures 4-6 The fluidic valve oscillator includes a cover plate 100, a base 200, and a flow blocking valve 300.

[0049] The cover plate 100 and the base 200 form an inflow channel 20, a flow channel system 30, and a working chamber 40 in sequence.

[0050] The flow channel system 30 includes an upper branch flow channel 31, a lower branch flow channel 32, an upper feedback channel 33, and a lower feedback channel 34. The upper branch flow channel 31, the lower branch flow channel 32, the upper feedback channel 33, and the lower feedback channel 34 converge at one end of the inflow channel 20 to form a branch flow port 50.

[0051] The flow blocking valve 300 is rotatably arranged in the working chamber 40. One side of the flow blocking valve 300 facing the flow channel system 30 and the chamber wall of the working chamber 40 form an upper chamber 3001 and a lower chamber 3002. In the case that the inflow channel 20 is filled with fluid, the flow blocking valve 300 can reciprocally rotate between an upper limit position, a middle position, and a lower limit position. In the upper limit position, the upper branch flow channel 31 and the upper feedback channel 33 at one end close to the working chamber 40 are connected through the upper chamber 3001, and the lower branch flow channel 32 at one end close to the working chamber 40 is connected with the outflow hole 10 through the lower chamber 3002. In the middle position, the upper branch flow channel 31 and part of the outflow hole 10 are connected through the upper chamber 3001, and the lower branch flow channel 32 and part of the outflow hole 10 are connected through the lower chamber 3002. In the lower limit position, the lower branch flow channel 32 and the lower feedback channel 34 at one end close to the working chamber 40 are connected through the lower chamber 3002, and the upper branch flow channel 31 at one end close to the working chamber 40 is connected with the outflow hole 10 through the upper chamber 3001.

[0052] In the embodiment of the present application, the fluidic valve oscillator achieves the formation of the dynamic and changing fluid jets in the upper chamber 3001 and the lower chamber 3002 by rotating the flow blocking valve 300 in the working chamber 40, relying on the rotation of the flow blocking valve 300 by the fluid itself, and the change of the fluid jets in turn pushes the flow blocking valve 300 to rotate back and forth, thereby continuously changing the flow area of the outflow hole 10 and controlling the opening and closing of the upper feedback channel 33 and the lower feedback channel 34. Under the joint action of the upper feedback channel 33, the lower feedback channel 34 and the flow blocking valve 300, periodic fluid oscillation is generated, the oscillation amplitude is significantly increased, and the mechanical oscillation effect is achieved, which is beneficial to realize multi-dimensional composite vibration of the pipe string system.

[0053] In addition, the flow blocking valve 300 continuously changes the rotation direction, and the flow blocking valve 300 interacts with the base body 200 due to the centrifugal force during rotation, so that the base body 200 makes a slight mechanical vibration with the rotation of the flow blocking valve 300. When the flow blocking valve 300 rotates to the limit position, the rotation direction is changed, and due to the existence of inertia, the vibration amplitude of the base body 200 reaches the peak value, which enhances the oscillation effect. At the same time, the shell and the base body 200 produce radial vibration, and when used in combination with the axial vibration joint, a certain amplitude of axial and radial multi-dimensional composite vibration can be realized, so that the friction force between the contact systems is greatly reduced, and a better oscillation effect is achieved.

[0054] It can be understood that the reciprocating rotation of the flow blocking valve 300 between the upper limit position, the intermediate position and the lower limit position means that the flow blocking valve 300 rotates from the upper limit position to the lower limit position through the intermediate position, and then rotates from the lower limit position to the upper limit position through the intermediate position, and so on. When the flow blocking valve 300 rotates to the upper limit position and the lower limit position, the outflow hole 10 is completely connected to the working chamber 40, and after the flow blocking valve 300 leaves the upper limit position and the lower limit position, the flow blocking valve 300 blocks part of the outflow hole 10. During the movement of the flow blocking valve 300 from the upper limit position to the intermediate position and from the lower limit position to the intermediate position, the part of the outflow hole 10 blocked by the flow blocking valve 300 gradually increases.

[0055] The working principle of the fluidic valve oscillator in the embodiment of the present application is as follows: when the pressurized fluid is introduced from the inflow channel 20, due to the Coanda effect, the high-speed fluid jet will adhere to one side of the upper shunt 31 or the lower shunt 32. It is assumed that the fluid jet is initially biased upward, and the fluid enters the upper chamber 3001 through the upper shunt 31. At the same time, the flow blocking valve 300 in the working chamber 40 should have a certain initial position, and it is assumed that the flow blocking valve 300 is initially in the lower limit position, for example, the flow blocking valve 300 is in the lower limit position, and the outflow hole 10 is completely connected to the working chamber 40. Figure 6As shown, at this time, the outflow hole 10 is in full communication with the upper chamber 3001, the flow area of the outflow hole 10 in the upper chamber 3001 reaches the maximum, the flow rate and pressure are the minimum, the high-speed jet flow from the upper shunt channel 31 impacts on the upper part of the flow-blocking valve 300, and pushes the flow-blocking valve 300 to rotate clockwise; during the rotation, the flow area of the outflow hole 10 is continuously reduced, and the flow rate and pressure are continuously increased; when the flow-blocking valve 300 rotates to the intermediate position, as shown, the upper feedback channel 33 is about to be opened, at this time, the flow area of the outflow hole 10 is the minimum, and the flow rate and pressure reach the peak value; when the flow-blocking valve 300 passes the intermediate position, the upper feedback channel 33 is opened, and the lower feedback channel 34 is closed, part of the fluid in the upper chamber 3001 enters the upper feedback channel 33 to reach the shunt port 50, forcing the jet flow at the shunt port 50 to change direction, and due to the Coanda effect, the jet flow enters the lower chamber 3002 through the lower shunt channel 32; at this time, the high-speed jet flow from the lower shunt channel 32 impacts on the lower part of the flow-blocking valve 300, and gives the flow-blocking valve 300 a force to rotate counterclockwise; due to inertia, the flow-blocking valve 300 will keep the previous clockwise rotation until it rotates to the upper limit position; during this process, the flow area of the outflow hole 10 is continuously increased, and the flow rate and pressure are continuously reduced; when it rotates to the upper limit position, as shown, at this time, the outflow hole 10 is in full communication with the lower chamber 3002, the flow area of the outflow hole 10 in the lower chamber 3002 reaches the maximum, the flow rate and pressure are the minimum. The high-speed jet flow impacts on the lower part of the flow-blocking valve 300, and the flow-blocking valve 300 changes the rotation direction to rotate counterclockwise; when the flow-blocking valve 300 passes the intermediate position, the lower feedback channel 34 is opened, and the upper feedback channel 33 is closed, part of the fluid in the upper chamber 3001 enters the upper feedback channel 33 to reach the shunt port 50, forcing the jet flow at the shunt port 50 to change direction, and entering the upper chamber 3001 through the upper shunt channel 31; due to inertia, the flow-blocking valve 300 will not immediately change the rotation direction, but will keep the previous counterclockwise rotation until it rotates to the lower limit position, i.e. the assumed initial position. At this point, the jet flow valve oscillator has worked for one cycle, and reciprocates like this, with the continuous rotation and change of direction of the flow-blocking valve 300, the jet flow also continuously deviates and changes direction, so that the output at the outflow hole 10 is a periodic high-amplitude pulse fluid, and a pressure pulse with a certain frequency is formed at the inflow channel 20; the reciprocating rotation of the flow-blocking valve 300 at the two limit positions exerts a certain force on the base body 200, and vibration is formed. Figure 5 Figure 4 As shown, at this time, the outflow hole 10 is in full communication with the lower chamber 3002, the flow area of the outflow hole 10 in the lower chamber 3002 reaches the maximum, the flow rate and pressure are the minimum. The high-speed jet flow impacts on the lower part of the flow-blocking valve 300, and the flow-blocking valve 300 changes the rotation direction to rotate counterclockwise; when the flow-blocking valve 300 passes the intermediate position, the lower feedback channel 34 is opened, and the upper feedback channel 33 is closed, part of the fluid in the upper chamber 3001 enters the upper feedback channel 33 to reach the shunt port 50, forcing the jet flow at the shunt port 50 to change direction, and entering the upper chamber 3001 through the upper shunt channel 31; due to inertia, the flow-blocking valve 300 will not immediately change the rotation direction, but will keep the previous counterclockwise rotation until it rotates to the lower limit position, i.e. the assumed initial position. At this point, the jet flow valve oscillator has worked for one cycle, and reciprocates like this, with the continuous rotation and change of direction of the flow-blocking valve 300, the jet flow also continuously deviates and changes direction, so that the output at the outflow hole 10 is a periodic high-amplitude pulse fluid, and a pressure pulse with a certain frequency is formed at the inflow channel 20; the reciprocating rotation of the flow-blocking valve 300 at the two limit positions exerts a certain force on the base body 200, and vibration is formed.

[0056] In order to prevent the working chamber 40 from being blocked by fluid, the outflow hole 10 with bidirectional flow is arranged on the cover plate 100 and the base body 200.

[0057] In an embodiment, as shown in Figure 2 and Figures 4-6 ​As shown, the base body 200 comprises a body 210, an upper flow guide 220, a lower flow guide 230 and a flow distribution block 240 arranged on the body 210, and the body 210 and the cover plate 100 form a flow inlet channel 20 and a cavity in communication with each other, the upper flow guide 220, the lower flow guide 230 and the flow distribution block 240 are located in the cavity and separate the cavity into a flow passage system 30 and a working cavity 40.

[0058] The upper flow guide 220 and the lower flow guide 230 are symmetrically arranged about the axis (shown as axis Z in the figure) of the flow inlet channel 20, the flow distribution block 240 is located between the upper flow guide 220 and the lower flow guide 230 and is symmetric about the axis of the flow inlet channel 20, the upper flow guide 220 and the flow distribution block 240 form an upper flow distribution passage 31, the lower flow guide 230 and the flow distribution block 240 form a lower flow distribution passage 32, the upper flow guide 220 and the inner wall of the cavity form an upper feedback passage 33, and the lower flow guide 230 and the inner wall of the cavity form a lower feedback passage 34.

[0059] By the above arrangement, the base body 200 and the cover plate 100 are combined and the upper flow distribution passage 31, the lower flow distribution passage 32, the upper feedback passage 33 and the lower feedback passage 34 of the flow passage system 30 are formed between the two.

[0060] Specifically, bolt holes 60 can be arranged on the body 210, and mounting holes (not shown in the figure) corresponding to the bolt holes 60 can be arranged on the cover plate 100, the cover plate 100 is arranged on the body 210 and is fastened by bolts to realize the assembly between the cover plate 100 and the base body 200.

[0061] In a specific embodiment, the body 210, the upper flow guide 220, the lower flow guide 230 and the flow distribution block 240 are of an integrated structure. By this design, the fluidic oscillation valve can be composed of fewer components and is easy to manufacture and install.

[0062] In a specific embodiment, as shown, Figure 3 The circumferential outer side of the flow blocking valve 300 comprises a first curved surface 301, a second curved surface 302 and a third curved surface 303 connected end to end, the radii of curvature of the second curved surface 302 and the third curved surface 303 are both smaller than the radius of curvature of the first curved surface 301, the second curved surface 302 and the third curved surface 303 are circumscribed and have the same radius of curvature, the second curved surface 302 and the third curved surface 303 are both inscribed in the first curved surface 301, the second curved surface 302 and the cavity wall of the working cavity 40 surround to form an upper cavity 3001, the second curved surface 302 and the cavity wall of the working cavity 40 surround to form a lower cavity 3002, the connection between the second curved surface 302 and the first curved surface 301 forms an upper flow blocking portion 310, the connection between the second curved surface 302 and the third curved surface 303 forms a flow blocking portion 320, and the connection between the third curved surface 303 and the first curved surface 301 forms a lower flow blocking portion 330.

[0063] In addition, the flow blocking valve 300 is further provided with a through hole 3003 for penetrating the rotating shaft 400. Figure 1 As shown, the flow blocking valve 300 is arranged in the working cavity 40 by rotating the rotating shaft 400 penetrating in the through hole 3003.

[0064] The second curved surface 302 and the third curved surface 303 of the flow blocking valve 300 cooperate with the cavity wall of the working cavity 40 to form the upper chamber 3001 and the lower chamber 3002 respectively, and play a role of guiding the flow of the upper feedback channel 33 and the lower feedback channel 34. Part of the fluid flows back to the flow dividing port 50 through the upper feedback channel 33 and the lower feedback channel 34, which continuously deflects the fluid of the flow dividing port 50, i.e. the fluid can form a periodic pulsed jet flow in the outflow hole 10 in the form of self-excitation.

[0065] In a more specific embodiment, as shown in the drawings, Figures 4-6 During the rotation of the flow blocking valve 300, the flow blocking part 320 is always in close contact with the side of the flow dividing block 240 close to the working cavity 40. During the rotation of the flow blocking valve 300 between the upper limit position and the intermediate position, the lower flow blocking part 330 is always in close contact with the side of the lower flow guiding body 230 close to the working cavity 40. When the flow blocking valve 300 is in the intermediate position, the upper flow blocking part 310 is in close contact with the side of the upper flow guiding body 220 close to the working cavity 40, and the lower flow blocking part 330 is in close contact with the side of the lower flow guiding body 230 close to the working cavity 40. During the rotation of the flow blocking valve 300 between the intermediate position and the lower limit position, the upper flow blocking part 310 is always in close contact with the side of the upper flow guiding body 220 close to the working cavity 40.

[0066] Specifically, the side of the upper flow guiding body 220, the flow dividing block 240 and the lower flow guiding body 230 close to the working cavity 40 is a curved surface.

[0067] The upper flow guiding body 220 and the lower flow guiding body 230 are symmetrical about the axis of the inflow channel 20, as shown in the drawings. Figure 7 As an example of the upper flow guiding body 220, it includes a fourth curved surface 221, a first flat surface 222, a fifth curved surface 223 and a second flat surface 224 connected end to end in this order, one end of the fourth curved surface 221 is tangent to the second flat surface 224, and the other end is perpendicular to the axis of the inflow channel 20, and the radius of the fifth curved surface 223 can be determined by the part through which the upper flow blocking part 310 slides during the rotation of the flow blocking valve 300. Similarly, the radius of the curved surface on the side of the lower flow guiding body 230 close to the working cavity 40 can be determined by the part through which the lower flow blocking part 330 slides during the rotation of the flow blocking valve 300.

[0068] Further, as shown in the drawings, Figure 2 and Figures 4-6As shown, the outflow hole 10 is a circular hole, and the side of the flow distribution block 240 close to the working cavity 40 is a curved surface tangent to the outflow hole 10. The radius of the curved surface of the side of the flow distribution block 240 close to the working cavity 40 can be determined according to the part that the flow blocking part 320 slides through during the rotation of the flow blocking valve 300.

[0069] In an embodiment, as shown in the figure, Figures 4-6 As shown, the inner wall of the working cavity 40 towards the flow channel system 30 includes an upper wall surface 41 and a lower wall surface 42 connected to each other, and the upper wall surface 41 and the lower wall surface 42 are symmetrically arranged about the axis of the inflow channel 20, the upper wall surface 41 abuts against the flow blocking valve 300 when the flow blocking valve 300 rotates to the upper limit position, and the lower wall surface 42 abuts against the flow blocking valve 300 when the flow blocking valve 300 rotates to the lower limit position.

[0070] In an embodiment, as shown in the figure, Figures 1-2 As shown, the inflow channel 20 includes an inflow hole 21 and a speed increasing channel 22 connected to each other, and the end of the speed increasing channel 22 away from the inflow hole 21 is connected to the flow channel system 30. In order to give the fluid a certain initial speed when entering the flow channel system 30, the opening area of the speed increasing channel 22 is smaller than that of the inflow hole 21, and a multi-stage speed increasing structure for increasing the speed of the fluid is arranged in the direction from the inflow hole 21 to the speed increasing channel 22.

[0071] When the pressurized fluid enters the flow channel system 30 from the inflow hole 21, it is given a certain initial speed through the speed increasing channel 22 to form a high-speed jet, and the high-speed jet is ejected along the opening direction of the flow distribution hole 50.

[0072] In another embodiment, as shown in the figure, Figure 8 Unlike the above embodiment, the second curved surface 302 and the third curved surface 303 of the flow blocking valve 300 have a larger bending degree, on the one hand, the acting area under the impact of the jet is increased, and on the other hand, the weight of the flow blocking valve 300 caused by the material itself is reduced, so that the flow blocking valve 300 rotates faster and more violently under the action of the jet, and the oscillation frequency of the jet valve oscillator is improved.

[0073] Further, as shown in the figure, Figure 9 The inside of the flow blocking valve 300 is provided with a hollow structure, which greatly reduces the weight of the flow blocking valve 300 and greatly improves the oscillation frequency of the jet valve oscillator.

[0074] The technical features of the above embodiments can be combined in any way. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present disclosure.

[0075] The above embodiments only express several implementation ways of the present application, and the description is specific and detailed, but it should not be understood as a limitation to the scope of the application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A fluidic trans-valve oscillator characterized by, The base body, the cover plate and the flow blocking valve are included. The inflow channel, the flow channel system and the working cavity are formed between the base body and the cover plate in sequence, and the cover plate and / or the base body is provided with an outflow hole communicating with the working cavity. The flow channel system includes an upper branch flow channel, a lower branch flow channel, an upper feedback channel and a lower feedback channel, one end of the upper branch flow channel communicates with one end of the inflow channel, one end of the lower branch flow channel communicates with one end of the inflow channel, one end of the upper feedback channel communicates with one end of the inflow channel, and one end of the lower feedback channel communicates with one end of the inflow channel, and converges to form a branch flow port. The flow blocking valve is rotationally arranged in the working cavity, and one side of the flow blocking valve facing the flow channel system and the cavity wall of the working cavity form an upper cavity and a lower cavity; in the case that the inflow channel is communicated with fluid, the flow blocking valve can reciprocate between the upper limit position, the intermediate position and the lower limit position. In the upper limit position, one end of the upper branch flow channel close to the working cavity communicates with the upper feedback channel through the upper cavity, and one end of the lower branch flow channel close to the working cavity communicates with the outflow hole through the lower cavity; in the intermediate position, the upper branch flow channel communicates with part of the outflow hole through the upper cavity, and the lower branch flow channel communicates with part of the outflow hole through the lower cavity; in the lower limit position, one end of the lower branch flow channel close to the working cavity communicates with the lower feedback channel through the lower cavity, and one end of the upper branch flow channel close to the working cavity communicates with the outflow hole through the upper cavity.

2. The fluidic trans-valve oscillator of claim 1, wherein, The base body includes a body and an upper flow guide, a lower flow guide and a branch flow block arranged on the body, the body and the cover plate form the inflow channel and the cavity in communication with each other, the upper flow guide, the lower flow guide and the branch flow block are located in the cavity and separate the cavity into the flow channel system and the working cavity; The upper flow guide and the lower flow guide are symmetrically arranged about the axis of the inflow channel, the branch flow block is located between the upper flow guide and the lower flow guide and is symmetric about the axis of the inflow channel, the upper flow guide and the branch flow block form the upper branch flow channel, the lower flow guide and the branch flow block form the lower branch flow channel, the upper flow guide and the inner wall of the cavity form the upper feedback channel, and the lower flow guide and the inner wall of the cavity form the lower feedback channel.

3. The fluidic trans-valve oscillator of claim 2, wherein, The body, the upper flow guide, the lower flow guide and the branch flow block are of an integral structure.

4. The fluidic trans-valve oscillator of claim 2, wherein, The circumferential outer side of the flow blocking valve comprises a first curve, a second curve and a third curve which are connected in a head-to-tail manner, the radius of curvature of the second curve and the radius of curvature of the third curve are both smaller than the radius of curvature of the first curve, the second curve and the third curve are circumscribed and have the same radius of curvature, the second curve and the third curve are both inscribed in the first curve, the second curve and the cavity wall of the working cavity form the upper chamber, the third curve and the cavity wall of the working cavity form the lower chamber, the connection between the second curve and the first curve forms an upper flow blocking part, the connection between the second curve and the third curve forms a flow blocking part, and the connection between the third curve and the first curve forms a lower flow blocking part.

5. The fluidic trans-valve oscillator of claim 4, wherein, During the rotation of the flow blocking valve, the flow blocking part is in close contact with the side of the flow distribution block close to the working cavity; During the rotation of the flow blocking valve between the upper limit position and the intermediate position, the lower flow blocking part is in close contact with the side of the lower flow guide close to the working cavity; When the flow blocking valve is in the intermediate position, the upper flow blocking part is in close contact with the side of the upper flow guide close to the working cavity, and the lower flow blocking part is in close contact with the side of the lower flow guide close to the working cavity; During the rotation of the flow blocking valve between the intermediate position and the lower limit position, the upper flow blocking part is in close contact with the side of the upper flow guide close to the working cavity.

6. The fluidic trans-valve oscillator of claim 5, wherein, The side of the upper flow guide, the flow distribution block and the lower flow guide close to the working cavity are all curved surfaces.

7. The fluidic trans-valve oscillator of claim 6, wherein, The outflow hole is a circular hole, and the side of the flow distribution block close to the working cavity is a curved surface tangent to the outflow hole.

8. The fluidic trans-valve oscillator according to any one of claims 1-6, wherein, The inner wall of the working cavity towards the flow channel system comprises an upper wall surface and a lower wall surface which are connected, and the upper wall surface and the lower wall surface are symmetrically arranged about the axis of the inflow channel, the upper wall surface is in close contact with the flow blocking valve when the flow blocking valve is rotated to the upper limit position, and the lower wall surface is in close contact with the flow blocking valve when the flow blocking valve is rotated to the lower limit position.

9. The fluidic trans-valve oscillator according to any one of claims 1-6, wherein, When the flow blocking valve is rotated to the upper limit position and the lower limit position, the outflow hole is completely connected to the working cavity, and after the flow blocking valve deviates from the upper limit position and the lower limit position, the flow blocking valve blocks part of the outflow hole, and during the movement of the flow blocking valve from the upper limit position to the intermediate position and from the lower limit position to the intermediate position, the part of the outflow hole blocked by the flow blocking valve gradually increases.

10. The fluidic trans-valve oscillator according to any one of claims 1-6, wherein, The inflow channel comprises an inflow hole and a speed increasing flow channel which are connected to each other, one end of the speed increasing flow channel away from the inflow hole is connected to the flow channel system, the opening area of the speed increasing flow channel is smaller than the opening area of the inflow hole, and a multi-stage speed increasing structure for increasing the speed of fluid is arranged in the direction from the inflow hole to the speed increasing flow channel.

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