Precise throttling device and method with adjustable taper and section

Abstract

The invention discloses a precision throttling device with the adjustable taper and section and a working method, solves the problem that the taper angle of a throttling device in the prior art cannot be adjusted, and has the beneficial effect that the taper angle and the size of a throttling hole can be adjusted at the same time, and according to the specific scheme, the precision throttling device with the adjustable taper and section comprises a shell, the shell is provided with an inlet and an outlet, a throttling hole adjusting mechanism is arranged in the shell and close to the outlet of the shell, the side, away from the outlet of the shell, of the throttling hole adjusting mechanism is movably connected with a plurality of taper adjusting plates, the taper adjusting plates surround to form a guide flow channel, the guide flow channel is of a cone-like structure, and a taper adjusting piece is arranged in the shell. The taper adjusting piece is connected with the taper adjusting plates, a first driving mechanism is arranged between the taper adjusting piece and the shell, a flow inlet pipe is arranged in the shell, one end of the flow inlet pipe is connected with the inlet of the shell, and the other end of the flow inlet pipe is in sealing contact with the inner side faces of the taper adjusting plates.

Description

Technical Field

[0001] The invention relates to the technical field of flow regulation, in particular to a precise throttling device and method with adjustable taper and cross section. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Precision flow control technology is widely used in aerospace, engineering machinery, medical equipment, agriculture and other fields. The throttling device is the core component of precision flow control technology, and its structure and performance are directly related to the effectiveness of actual operations. Conventional fixed throttling devices have a simple structure but are very easy to clog, and the unchanging structure of the throttling device is difficult to cope with complex and changeable actual working conditions, and its dynamic performance is limited. Existing variable flow throttling devices are mainly achieved by changing the cross-sectional area of ​​the fluid throttling port. Although existing flow regulation technology can already meet the needs of most application fields, there are still challenges for flow control with higher precision requirements.

[0004] When precisely controlling the fluid, the influence of the guide cone angle of the throttling device on the static and dynamic performance of the fluid cannot be ignored. The change of the guide cone angle is an important factor affecting the fluid performance. However, the existing design schemes of precision throttling devices do not take the change of the guide cone angle into consideration and all adopt a unified fixed setting.

[0005] Regardless of small flow control or large flow control, a precision throttling device is required. The existing technical solutions are mainly aimed at small flow scenarios (such as flow control of liquid hydrostatic support functional components) or large flow scenarios (pipeline flow control in industry or agriculture). In other words, the existing technology lacks a precision throttling technical solution that can simultaneously solve the precision control of large and small flows.

[0006] In addition, since the existing technical solutions are limited by the characteristics of the driving device (such as a servo motor), the overall size of the throttling device is too large, which limits its installation space and increases its manufacturing cost. It also poses a great challenge to high-precision control when the flow changes in a small range. Summary of the invention

[0007] In view of the deficiencies in the prior art, the object of the present invention is to provide a precision throttling device and method with adjustable taper and cross-section, which can adjust the size of the throttling hole and can also adjust the cone angle of the cone-like surface formed by the taper adjustment plate.

[0008] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0009] A precision throttling device with adjustable taper and cross-section comprises a shell, wherein the shell is provided with an inlet and an outlet, a throttling hole adjusting mechanism is arranged in the shell near the shell outlet, a throttling hole connected with the inlet and the outlet is formed at the throttling hole adjusting mechanism, the throttling hole adjusting mechanism can adjust the size of the throttling hole, a side of the throttling hole adjusting mechanism away from the shell outlet is movably connected with a plurality of taper adjusting plates respectively, the plurality of taper adjusting plates are surrounded to form a guide flow channel, the guide flow channel is a cone-like structure, a taper adjusting member is arranged inside the shell, the taper adjusting member is connected with the taper adjusting plate, a first driving mechanism is arranged between the taper adjusting member and the shell, an inlet pipe is arranged in the shell, one end of the inlet pipe is connected with the shell inlet, and the other end of the inlet pipe is in sealing contact with the inner side surfaces of the plurality of taper adjusting plates, and the first driving mechanism is actuated to drive the taper adjusting member to move axially relative to the shell to adjust the cone angle of the guide flow channel.

[0010] As described above, a precision throttling device with adjustable taper and cross-section, a taper adjustment track is fixed to the inner wall of the shell, the taper adjustment track is provided at least two places and is evenly arranged along the circumference of the shell, the taper adjustment part is a taper adjustment ring, the taper adjustment ring is inserted into the taper adjustment track, the first driving mechanism is installed on the taper adjustment ring, and the driving end of the first driving mechanism is in contact with the taper adjustment track.

[0011] In the precision throttling device with adjustable taper and cross-section as described above, the taper adjustment ring is lower than the top of the taper adjustment track, the taper adjustment ring is connected to the taper adjustment plate through a taper plate support rod, and a sealing strip is arranged on one side of the taper adjustment plate close to the adjacent taper adjustment plate.

[0012] As described above, a precision throttling device with adjustable taper and cross-section, wherein the first driving mechanism is a linear stick-slip feed mechanism, the linear stick-slip feed mechanism includes a first ceramic driver, a first rotating component is arranged on one side of the first ceramic driver, a first telescopic component is arranged on the other side of the first ceramic driver, the driving end of the first ceramic driver is connected to the first movable end, and the first movable end is in contact with the taper adjustment track.

[0013] A precision throttling device with adjustable taper and cross section as described above, wherein the housing comprises an outer shell and a cover body, the outer shell supports the throttling hole adjustment mechanism, the cover body is provided with an inner hole, the inner hole wall of the cover body is sealed and connected with the inlet pipe, a spring fixing ring is provided in the annular direction of the inlet pipe, and a spring is provided between the end of the inner hole of the cover body and the spring fixing ring to provide a pressing force to the inlet pipe;

[0014] A pressure sensor is arranged at the shell outlet.

[0015] In the above-mentioned precision throttling device with adjustable taper and cross-section, a reciprocating support frame is annularly fixed to the inlet pipe, and a roller is movably provided on the reciprocating support frame toward one side of the taper adjustment plate, and the roller can contact the inner side of the taper adjustment plate.

[0016] As described above, a precision throttling device with adjustable taper and cross-section, the throttling hole adjustment mechanism includes a shutter column, a shutter fixing plate and a shutter rotating plate, the shutter fixing plate is fixed to the side of the shell body close to the shell outlet, the shutter column includes a plurality of wedge-shaped shutter bodies, two adjacent shutter bodies are arranged in a close relationship, the center of the shutter column forms the throttling hole, the two ends of the shutter rotating column are respectively inserted into the first slideway of the shutter fixing plate and the second slideway of the shutter rotating plate, a second driving mechanism is also arranged between the shutter rotating plate and the inner wall of the shell, the second driving mechanism drives the shutter rotating plate to rotate relative to the shell and then drives the movement of the shutter rotating column to achieve the adjustment of the aperture size of the throttling hole.

[0017] As described above, a precision throttling device with adjustable taper and cross-section, the second driving mechanism is a circumferential stick-slip feed mechanism, the circumferential stick-slip feed mechanism includes a second ceramic driver, a second rotating component is arranged on one side of the second ceramic driver, and a second telescopic component is arranged on the other side of the second ceramic driver, the fixed end of the second ceramic driver is connected to the shutter rotating plate, the driving end of the second ceramic driver is connected to the second movable end, and the second movable end is in contact with the inner wall of the shell.

[0018] As described above, in a precision throttling device with adjustable taper and cross-section, the shutter rotating column is connected to the corresponding taper adjustment plate through a connecting leaf spring, a support bearing is arranged between the shutter rotating plate and the inner wall of the shell, the support bearing is located below the second driving mechanism, and the second driving mechanism is arranged in pairs and symmetrically along the central axis of the shell.

[0019] In a second aspect, the present invention further discloses a working method of a precision throttling device with adjustable taper and cross-section, including the following contents:

[0020] The fluid enters through the shell inlet, flows through the inlet pipe, enters the multiple tapered adjustment plates and enters the throttle hole. The throttle hole size can be adjusted through the throttle hole adjustment mechanism;

[0021] Because the taper adjustment member is connected to the taper adjustment plate, the first drive mechanism drives the taper adjustment member to move axially relative to the shell, thereby changing the inclination angle of the taper adjustment plate relative to the center line of the shell, thereby changing the angle of the conical surface formed by the multiple taper adjustment plates.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1) The overall structure of the present invention is compact. A throttle adjustment mechanism and a guide flow channel are arranged in the shell. The guide flow channel is composed of a plurality of taper adjustment plates. A taper adjustment member connected to the taper adjustment plate is arranged in the shell. A first driving mechanism is arranged between the taper adjustment member and the shell. The first driving mechanism drives the taper adjustment member to rotate relative to the shell to adjust the taper angle of the guide flow channel. In this way, the taper angle of the guide flow channel is adjusted in real time to reduce fluid resistance. The throttle adjustment mechanism is used to adjust the size of the throttle aperture, which effectively improves the static and dynamic performance of the fluid during throttling and can effectively ensure the precision of fluid control.

[0024] The size of the guide channel and the throttle hole can be increased or decreased according to application requirements to make it suitable for precise throttling scenarios with different flow specifications, and it has good universal performance.

[0025] 2) The present invention is provided with a taper adjustment track, which is fixed to the inner wall of the shell, and cooperates with the taper adjustment plate. The first driving mechanism is installed on the taper adjustment member, and the driving end of the first driving mechanism contacts the taper adjustment track, so that the taper adjustment track provides a reaction force to the first driving mechanism, thereby the taper adjustment ring drives the taper adjustment plate to adjust the angle relative to the central axis of the shell.

[0026] 3) In the present invention, the first driving mechanism is a linear stick-slip mechanism, and the second driving mechanism is a circular stick-slip feeding mechanism. The telescopic parts and the rotating parts of the two constitute a compliant mechanism. The moving ends of the two can achieve high-response and high-precision movement under the action of friction, further ensuring the precise adjustment of the guide channel and the precise adjustment of the size of the throttle hole. It can achieve high-precision regulation for small-range changes in flow, solving the defects of the prior art such as limited installation space and increased manufacturing cost caused by the excessive size of the drive motor body, and at the same time has high response and high-precision performance.

[0027] 4) The throttle hole adjustment mechanism in the present invention has a reasonable structure. The shutter column includes multiple shutter rotating columns. The two ends of the shutter rotating column are respectively inserted into the first slide of the shutter fixing plate and the second slide of the shutter rotating plate. In this way, when the shutter rotating plate rotates relative to the inner wall of the shell, the shutter rotating plate and the shutter fixing plate limit the shutter body. The shutter body moves along the first slide and the second slide to limit the movement of the shutter body, thereby adjusting the size of the throttle hole between the shutter bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0029] Figure 1It is a structural schematic diagram of a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0030] Figure 2 It is a schematic diagram of a cover body and an inlet pipe in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0031] Figure 3 It is a schematic diagram of a reciprocating support frame in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0032] Figure 4 It is a schematic diagram of the connection between a taper adjustment plate and a shutter column in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0033] Figure 5 It is a schematic diagram of a throttle hole adjustment mechanism in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0034] Figure 6 It is a schematic diagram of a guide channel adjustment mechanism in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0035] Figure 7 It is a schematic diagram of a taper adjusting member in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0036] Figure 8 It is a schematic diagram of a linear stick-slip feed mechanism in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0037] Fig. 9 It is a schematic diagram of a circumferential stick-slip feeding mechanism in a precision throttling device with adjustable taper and cross-section according to one or more embodiments of the present invention.

[0038] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0039] Among them: 1. Shell;

[0040] 2. Shutter fixing plate; 201. Upper end surface of the fixing plate; 202. Linear track;

[0041] 3. Shutter column; 301. Shutter rotating column; 302. Shutter body; 303. Shutter rotating column;

[0042] 4. Shutter rotating plate; 401. Arc track;

[0043] 5. Linear stick-slip feeding mechanism; 501. First mounting plate; 502. First telescopic component; 503. First moving end; 504. First piezoelectric ceramic; 505. First rotating component; 506. First extension plate; 507. First connecting plate;

[0044] 6. Taper adjustment track; 601. Mounting hole; 602. Mounting surface; 603. Support surface;

[0045] 7. Spring fixing ring;

[0046] 8. Support spring;

[0047] 9. Cover body; 901. Wall of hole in cover body;

[0048] 10. Inlet pipe; 1001. First rubber ring; 1002. Second rubber ring;

[0049] 11. taper adjustment plate; 1101. metal support plate; 1102. connection hole; 1103. connection leaf spring; 1104. rubber sealing strip;

[0050] 12. cone plate support rod; 1201. ball joint; 1202. rod body;

[0051] 13. taper adjustment member; 1301. circumferential surface; 1302. connecting hole; 1303. groove contact surface;

[0052] 14. Circumferential stick-slip feeding mechanism; 1401. Second mounting plate; 1402. Second rotating component; 1403. Second moving end; 1404. Second telescopic component; 1405. Second piezoelectric ceramic; 1406. Second connecting plate; 1407. Third connecting plate; 1408. Second extension rod;

[0053] 15. Support bearing; 1501. Bearing inner ring; 1502. Bearing outer ring;

[0054] 16. Pressure sensor;

[0055] 17. reciprocating support frame; 1701. inner circumferential surface; 1702. mounting hole; 1703. wheel axle; 1704. roller; 1705. wheel frame. DETAILED DESCRIPTION

[0056] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0058] As introduced in the background technology, there is a problem in the prior art that the cone angle of the throttling device cannot be adjusted. In order to solve the above technical problem, the present invention proposes a precision throttling device with adjustable taper and cross-section.

[0059] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a precision throttling device with adjustable taper and cross-section comprises a shell, wherein the shell is provided with an inlet and an outlet, a throttling hole adjusting mechanism is arranged in the shell near the shell outlet, a throttling hole connected with the inlet and the outlet is formed at the throttling hole adjusting mechanism, the throttling hole adjusting mechanism can adjust the size of the throttling hole, the throttling hole adjusting mechanism is movably connected with a plurality of taper adjusting plates 11 on one side away from the shell outlet, the plurality of taper adjusting plates 11 are surrounded to form a guide flow channel, the guide flow channel is a cone-like structure, a taper adjusting member 13 is arranged inside the shell, the taper adjusting member 13 is connected with the taper adjusting plate 11, a first driving mechanism is arranged between the taper adjusting member 13 and the shell, an inlet pipe 10 is arranged in the shell, one end of the inlet pipe 10 is connected with the shell inlet, and the other end of the inlet pipe 10 is in sealing contact with the inner side surfaces of the plurality of taper adjusting plates 11, and the first driving mechanism drives the taper adjusting member to move axially relative to the shell to adjust the cone angle of the guide flow channel.

[0060] refer to Figure 2 As shown, the shell includes a cover body 9 and an outer shell 1, the cover body 9 is fixedly connected with the outer shell 1 to form a closed space, the middle part of the cover body 9 protrudes toward the outer shell 1, that is, the cover body 9 forms an inner hole, and the inner hole wall surface 901 of the cover body 9 is matched with the outer circumferential surface of the inlet pipe 10 with high precision to realize the reciprocating movement of the inlet pipe 10; the reciprocating support frame 17 is fixedly connected with the inlet pipe 10, and is used to support the axial movement of the inlet pipe 10 when the taper adjustment plate 11 moves; a spring fixing ring 7 is arranged in the middle section of the inlet pipe 10, the spring fixing ring 7 is fixedly connected with the inlet pipe 10, and the support spring 8 is installed between the spring fixing ring 7 and the inner circle of the cover body 9, so as to provide a supporting force for the lower end of the inlet pipe 10 to always be close to the taper adjustment plate 11;

[0061] In addition, an outlet is arranged on a side of the housing 1 away from the cover body, and a pressure sensor 16 is installed at the outlet for pressure detection. The pressure sensor 16 is connected to a controller, which may be a PLC controller or an existing microcontroller. The controller is separately connected to the first drive mechanism and the second drive mechanism, respectively, to control the actions of the first drive mechanism and the second drive mechanism according to the pressure value.

[0062] It is easy to understand that the outer shell 1 is provided with multiple inner circumferential surfaces, and the functions from bottom to top are as follows: the oil outlet of the throttling device, the mating surface with the shutter fixing plate 2, the mating surface with the bearing outer ring 1502, the mating surface with the taper adjustment ring 13 and the mounting surface of the taper adjustment rail 6, and the spacing distance between the shutter fixing plate mating surface and the mating surface with the support bearing outer ring 1502.

[0063] refer to Figure 2 As shown, a first rubber ring 1001 and a second rubber ring 1002 are respectively provided at both ends of the inlet pipe 10, and both rubber rings are conical rubber rings. Under the action of fluid pressure, the first rubber ring 1001 is tightly fitted with the inner hole wall surface 901 of the cover body, and the second rubber ring 1002 is tightly fitted with the approximate conical surface formed by the conical adjustment plates 11 evenly distributed on the circumference to ensure the sealing performance; the number and size of the conical adjustment plates 11 must be set to meet the roundness requirements of the approximate conical surface formed and ensure the sealing performance of the throttling surface.

[0064] In this embodiment, the throttle adjustment mechanism includes a shutter column 3, a shutter fixing plate 2 and a shutter rotating plate 4. The shutter fixing plate 2 is fixed to a side of the shell near the shell outlet. The shutter column 3 includes a plurality of wedge-shaped shutter bodies 302. The number of shutter bodies can be determined according to the roundness requirements of the throttle, and can generally be 10-14. The sides of two adjacent shutter bodies 302 are fitted together, and a throttle is formed in the center of the throttle adjustment mechanism. The throttle is a polygonal hole.

[0065] It should be noted that reference Figure 4 As shown, there are multiple taper adjustment plates 11, and the number of the taper adjustment plates is the same as the number of the shutter columns 3. Adjacent taper adjustment plates 11 are in contact with each other and are staggered, so that the multiple taper adjustment plates 11 surround to form a conical surface (approximately a conical surface), and the width of the taper adjustment plate 11 close to the shutter column 3 is smaller than the width of the other side of the taper adjustment plate 11. A sealing strip is set on the side of the taper adjustment plate 11, and the sealing strip is a rubber sealing strip 1104. The taper adjustment plate specifically selects a metal support plate 1101. When the taper adjustment plates are distributed in a cone shape on the circumference, the rubber sealing strip 1104 between the adjacent metal support plates 1101 is bent by force.

[0066] refer to Figure 6As shown, the taper adjustment track 6 is provided at multiple locations and is evenly arranged along the circumference, specifically 4 locations, the interval between two adjacent taper adjustment tracks 6 is set at a set angle, the top of the taper adjustment track 6 is set higher than the highest position of the taper adjustment plate, the taper adjustment track is a flat plate, the outer side surface of the taper adjustment track 6 is a mounting surface 602, the mounting surface 602 is fitted with the inner wall of the shell 1, the inner side surface of the taper adjustment track 6 is a supporting surface 603, the taper adjustment track 6 is provided with a second mounting hole 601, and the taper adjustment track 6 is fixedly connected to the shell 1 through the second mounting hole 601;

[0067] It is easy to understand that the taper adjustment ring (ring) is set lower than the taper adjustment track 6, the taper adjustment ring is set lower than the end of the taper adjustment plate 11 away from the throttle adjustment mechanism, the shutter column 3 is the same as the taper adjustment plate 11 and the taper plate support rod 12, and they are all evenly arranged along the circumferential direction, and the inner wall of the taper adjustment plate 11 is in contact with the lower end of the inlet pipe 10;

[0068] Among them, the taper adjustment plate 11 is connected to the shutter column 3 one-to-one, and the taper adjustment plate 11 is connected to the taper adjustment ring 13 through the taper plate support rod 12, and the taper adjustment ring 13 is located in the outer ring direction of the taper adjustment plate 11; the linear stick-slip feed mechanism 5 is fixedly connected to the taper adjustment ring 13, and the taper adjustment ring 13 can move axially through the taper adjustment track 6, and the first driving mechanism, i.e., the linear stick-slip feed mechanism 5, is evenly distributed along the circumferential direction and is installed corresponding to the taper adjustment track 6;

[0069] refer to Figure 4 As shown, a connecting leaf spring 1103 is arranged on the side of the taper adjustment plate 11 close to the shutter column 3. The connecting leaf spring refers to an elastic connecting leaf. The connecting leaf spring 1103 connects the taper adjustment plate 11 and the shutter body 302, so that the taper adjustment plate 11 can realize rotational motion relative to the upper end surface of the shutter column along the axis of the connecting leaf spring 1103. A connecting block is arranged on the outer side surface of the taper adjustment plate 11, and a connecting hole 1102 is arranged at the connecting block. The connecting hole 1102 is fixedly connected to the ball joint 1201 in the taper plate support rod 12, and the ball joint 1201 is connected to the rod body 1202.

[0070] refer to Figure 7 As shown, the outer circumferential surface of the taper adjustment ring 13 is processed with grooves to match the taper adjustment track 6. The number of grooves corresponds to the number of the taper adjustment track 6. The size of the grooves is consistent with the taper adjustment track 6 and a sliding gap is left. The taper adjustment track can be inserted into the groove of the taper adjustment ring 13. The contact surface 1303 of the groove in contact with the taper adjustment track 6 is provided with a friction-reducing coating to reduce friction.

[0071] It is easy to understand that the radius of the circumferential surface 1301 of the taper adjustment ring 13 is slightly smaller than the radius of the corresponding inner circle of the housing 1 to avoid unnecessary friction. The taper adjustment ring 13 is provided with a plurality of protruding blocks, and the interval between two adjacent protruding blocks is set at a set angle. The connecting hole 1302 is fixedly connected with the ball joint 1201 in the cone plate support rod 12;

[0072] refer to Figure 2 As shown, a reciprocating support frame 17 is provided on one side of the inlet pipe 10 close to the second rubber ring 1002. The reciprocating support frame 17 is a circular ring, and a distance is set between the reciprocating support frame 17 and the second rubber ring 1002.

[0073] refer to Figure 3 As shown, the reciprocating support frame 17 is provided with a first mounting hole 1702, and the reciprocating support frame is installed in cooperation with the inlet pipe 10 through the inner circumferential surface 1701, and is fixed to the inlet pipe 10 through the first mounting hole 1702. A plurality of rolling wheels are provided on the side of the reciprocating support frame 17 close to the taper adjustment plate, and the roller wheels can contact the inner side surface of the taper adjustment plate. The rolling wheels include a wheel frame 1705, and the wheel frame 1705 is fixed to the reciprocating support frame 17. The roller 1704 is installed on the wheel frame 1705 through the wheel axle 1703. When the size of the overall throttling device is small, the roller assembly can be replaced by a simple mechanical structure using a self-lubricating material (such as polytetrafluoroethylene) as needed.

[0074] In this embodiment, the taper adjustment ring 13 is fixedly connected to the linear stick-slip feed mechanism 5, and the moving end of the linear stick-slip feed mechanism 5 contacts one side of the taper adjustment track 6. The friction force of the contact surface is increased by processing. Multiple groups of linear stick-slip feed mechanisms 5 drive the taper adjustment ring 13 to reciprocate along the taper adjustment track 6 by means of friction force.

[0075] Specifically, refer to Figure 8As shown, the linear stick-slip feeding mechanism 5 includes a first mounting plate 501, the first mounting plate 501 is fixedly connected to the taper adjustment ring 13, a first piezoelectric ceramic 504 is arranged on one side of the first mounting plate 501, and a first telescopic component 502 and a first rotating component 505 are respectively arranged on both sides of the first piezoelectric ceramic. The first telescopic component 502, the first rotating component 505, one end away from the first mounting plate, and the driving end of the first piezoelectric ceramic are all connected to the first connecting plate 507. The first connecting plate 507 is connected to the first connecting plate 507 when it is beyond the first telescopic component. A first extension plate 506 is provided at one end of 502, and a distance is set between the first extension plate 506 and the telescopic component. The first extension plate 506 forms a first movable end 503 at one end away from the first connecting plate. The first movable end 503 protrudes from the first extension plate and is arranged to contact the taper adjustment track 6. The first telescopic component 502 and the rotating part 505 form a compliant mechanism, and the first piezoelectric ceramic 504 is driven by a control signal to enable the first movable end 503 in the stick-slip feeding mechanism 5 to move with high response and high precision under the action of friction.

[0076] It should be noted that the shutter fixing plate 2 is embedded in the housing 1, and the two do not move relative to each other. The shutter fixing plate 2 supports the shutter column 3, and the shutter column 3 supports the shutter rotating plate 4 through the support bearing 15. The support bearing 15 is a thin-walled bearing.

[0077] refer to Figure 4 and Figure 5 As shown, the shutter body 302 is wedge-shaped, the side of the shutter body close to the throttle hole is sharp, the thickness of the shutter body gradually increases, and a convex portion is provided at the end of the shutter body away from the throttle hole. Each shutter body 302 has a set height, a shutter rotating column 301 is provided at one end of the shutter body 302, and a shutter rotating column 303 is provided at the other end. The shutter rotating column 301 is correspondingly inserted into the first track, i.e., the arc track 401, in the shutter rotating plate 4, and the shutter rotating column 303 is correspondingly inserted into the second track, i.e., the linear track 202, in the shutter fixing plate 2, and the bottom surface of the shutter body 302 is in contact with the upper end surface 201 of the shutter fixing plate 2.

[0078] It should be noted that the circumferential stick-slip feed mechanism 14 is evenly distributed on the circumferential side of the shutter rotating plate 4. The circumferential stick-slip feed mechanism 14 can be set at two locations. The circumferential stick-slip feed mechanism 14 forms a relative motion with the inner circumferential surface of the outer shell 1 to drive the throttle hole adjustment mechanism to adjust the size of the throttle hole. The shutter rotating plate 4 is fixedly connected to the inner ring 1501 of the support bearing, and the outer ring 1502 of the support bearing is fixedly connected to the circumferential inner surface of the outer shell 1. The support bearing is located below the circumferential stick-slip feed mechanism 14.

[0079] refer to Fig. 9As shown, the circumferential stick-slip feeding mechanism 14 includes a second mounting plate 1401, which is fixedly connected to the outer circumferential surface of the shutter rotating plate 4 through the second mounting plate 1401, and the side of the second mounting plate 1401 away from the shutter rotating plate 4 is connected to the second connecting plate 1406, and the second connecting plate 1406 is connected to the second piezoelectric ceramic 1405. The second telescopic component 1404 and the second rotating component 1402 are respectively arranged on both sides of the second piezoelectric ceramic, and the ends of the second telescopic component 1404 and the second rotating component 1402 away from the second connecting plate 1406 and the driving end of the second piezoelectric ceramic are connected to the third connecting plate 1407. A second extension rod 1408 is provided at one end of the plate 1407 that extends beyond the second telescopic component 1404. The second extension rod 1408 is spaced apart from the second telescopic component. An end of the second extension rod away from the third connecting plate 1407 forms a second movable end 1403. The second movable end 1403 protrudes from the second extension rod to contact the inner wall of the outer shell 1. The second telescopic component 1404 and the second rotating component 1402 form a flexible structure. The second piezoelectric ceramic 1405 is driven by a control signal so that the second movable end 1403 in the circular stick-slip feed mechanism 14 moves with high response and high precision under the action of friction.

[0080] The first telescopic component and the second telescopic component have the same structure, both of which include a multi-stage S-shaped structure to ensure the movement range of the two components. The first rotating component and the second rotating component have the same structure, both of which are lever-type amplification structures.

[0081] In addition, this embodiment also provides a working method of a precision throttling device with adjustable taper and cross-section, including the following contents:

[0082] Fluid such as gas or liquid enters through the housing inlet, flows through the inlet pipe 10, enters the plurality of tapered adjustment plates 11 and enters the throttle hole, and drives the shutter rotating plate 4 to move through the circumferential stick-slip feeding mechanism 14 in the throttle hole adjustment mechanism. Since the shutter body is inserted into the shutter rotating plate and the shutter fixed plate, the shutter body 302 is driven to move relative to the shutter rotating plate 4 and the shutter fixed plate 2, thereby achieving the adjustment of the size of the throttle hole;

[0083] Because the taper adjustment ring is connected to the taper adjustment plate 11, the linear stick-slip feed mechanism 5 drives the taper adjustment member to move axially relative to the shell, thereby changing the inclination angle of the taper adjustment plate 11 relative to the center line of the shell, thereby changing the angle of the conical surface formed by the multiple taper adjustment plates 11.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A precision throttling device with adjustable taper and cross section, characterized in that: The invention comprises a shell, which is provided with an inlet and an outlet. A throttle hole adjustment mechanism is arranged in the shell near the shell outlet. A throttle hole connected with the inlet and the outlet is formed at the throttle hole adjustment mechanism. The throttle hole adjustment mechanism can adjust the size of the throttle hole. The throttle hole adjustment mechanism is movably connected with a plurality of taper adjustment plates on a side away from the shell outlet. The plurality of taper adjustment plates are surrounded to form a guide flow channel. The guide flow channel is a cone-like structure. A taper adjustment member is arranged inside the shell. The taper adjustment member is connected with the taper adjustment plate. A first driving mechanism is arranged between the taper adjustment member and the shell. An inlet pipe is arranged in the shell. One end of the inlet pipe is connected with the shell inlet. The other end of the inlet pipe is in sealing contact with the inner side surfaces of the plurality of taper adjustment plates. The action of the first driving mechanism drives the taper adjustment member to move axially relative to the shell to adjust the taper angle of the guide flow channel.

2. A precision throttling device with adjustable taper and cross section according to claim 1, characterized in that: A taper adjustment track is fixed to the inner wall of the shell, and the taper adjustment track is provided at least in two locations and is evenly arranged along the circumference of the shell. The taper adjustment member is a taper adjustment ring, and the taper adjustment ring is inserted into the taper adjustment track. The first driving mechanism is installed on the taper adjustment ring, and the driving end of the first driving mechanism is in contact with the taper adjustment track.

3. A precision throttling device with adjustable taper and cross section according to claim 2, characterized in that: The taper adjustment ring is lower than the top of the taper adjustment track. The taper adjustment ring is connected to the taper adjustment plate through a taper plate support rod. A sealing strip is arranged on one side of the taper adjustment plate close to the adjacent taper adjustment plate.

4. A precision throttling device with adjustable taper and cross section according to claim 2, characterized in that: The first driving mechanism is a linear stick-slip feed mechanism, which includes a first ceramic driver, a first rotating component is arranged on one side of the first ceramic driver, a first telescopic component is arranged on the other side of the first ceramic driver, the driving end of the first ceramic driver is connected to the first movable end, and the first movable end is in contact with the taper adjustment track.

5. A precision throttling device with adjustable taper and cross section according to claim 1, characterized in that: The housing comprises an outer shell and a cover body, the outer shell supports the throttle hole adjustment mechanism, the cover body is provided with an inner hole, the inner hole wall of the cover body is sealed and connected with the inlet pipe, a spring fixing ring is provided in the annular direction of the inlet pipe, and a spring is provided between the end of the inner hole of the cover body and the spring fixing ring to provide a pressing force to the inlet pipe; A pressure sensor is arranged at the shell outlet.

6. A precision throttling device with adjustable taper and cross section according to claim 1, characterized in that: A reciprocating support frame is annularly fixed to the inlet pipe, and a roller is movably arranged on the reciprocating support frame on one side facing the taper adjustment plate, and the roller can contact the inner side surface of the taper adjustment plate.

7. A precision throttling device with adjustable taper and cross section according to claim 1, characterized in that: The throttle hole adjustment mechanism includes a shutter column, a shutter fixing plate and a shutter rotating plate. The shutter fixing plate is fixed on one side of the shell body close to the shell outlet. The shutter column includes a plurality of wedge-shaped shutter bodies. Two adjacent shutter bodies are arranged in a close fit. The center of the shutter column forms the throttle hole. The two ends of the shutter rotating column are respectively inserted into the first slideway of the shutter fixing plate and the second slideway of the shutter rotating plate. A second driving mechanism is also arranged between the shutter rotating plate and the inner wall of the shell. The second driving mechanism drives the shutter rotating plate to rotate relative to the shell and then drives the movement of the shutter rotating column to adjust the aperture size of the throttle hole.

8. A precision throttling device with adjustable taper and cross section according to claim 7, characterized in that: The second driving mechanism is a circumferential stick-slip feed mechanism, which includes a second ceramic driver, a second rotating component is arranged on one side of the second ceramic driver, and a second telescopic component is arranged on the other side of the second ceramic driver. The fixed end of the second ceramic driver is connected to the shutter rotating plate, the driving end of the second ceramic driver is connected to the second movable end, and the second movable end is in contact with the inner wall of the shell.

9. A precision throttling device with adjustable taper and cross section according to claim 7, characterized in that: The shutter rotating column is connected to the corresponding taper adjustment plate through a connecting plate spring. A support bearing is arranged between the shutter rotating plate and the inner wall of the shell. The support bearing is located below the second driving mechanism. The second driving mechanism is arranged in pairs and symmetrically along the central axis of the shell.

10. A working method of a precision throttling device with adjustable taper and cross section according to any one of claims 1 to 9, characterized in that: It includes the following: The fluid enters through the shell inlet, flows through the inlet pipe, enters the multiple tapered adjustment plates and enters the throttle hole. The throttle hole size can be adjusted through the throttle hole adjustment mechanism; Because the taper adjustment member is connected to the taper adjustment plate, the first drive mechanism drives the taper adjustment member to move axially relative to the shell, thereby changing the inclination angle of the taper adjustment plate relative to the center line of the shell, thereby changing the angle of the conical surface formed by the multiple taper adjustment plates.

Images