A precision throttling device and method with adjustable taper and cross section

Abstract

The application discloses a precision throttling device with adjustable taper and cross section and a working method, and solves the problem that the taper angle of the throttling device cannot be adjusted in the prior art, and has the beneficial effect that the taper angle and the size of the throttling hole can be adjusted simultaneously, and the specific scheme is as follows: a precision throttling device with adjustable taper and cross section, which 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, a plurality of taper adjusting plates are movably connected to the side of the throttling hole adjusting mechanism away from the outlet of the shell, the plurality of taper adjusting plates surround a guide flow channel, the guide flow channel is a conical structure, 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 surface of the plurality of taper adjusting plates.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow regulation, in particular to a precision throttling device and method with adjustable taper and cross section. BACKGROUND

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

[0003] Precision flow control technology is widely used in aerospace, engineering machinery, medical devices, agriculture and other fields. As the core component of precision flow control technology, the structure and performance of the throttling device directly affect the effectiveness of actual operation. The conventional fixed throttling device is simple in structure but easy to block, and the fixed structure of the throttling device is difficult to cope with complex and variable actual working conditions, and the dynamic performance is limited. The existing variable flow throttling device mainly realizes by changing the cross-sectional area of the fluid throttling port. Although the existing flow regulation technology can meet the needs of most application fields, there are still challenges for higher precision flow control.

[0004] When controlling fluid precisely, 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 performance of the fluid, and the existing precision throttling device design scheme does not consider the change of the guide cone angle, which is uniformly fixed.

[0005] Whether it is small flow control or large flow control, a precision throttling device is needed. The existing technical solutions mainly aim at small flow scenarios (such as liquid static pressure support function component flow control) or large flow scenarios (industrial or agricultural pipeline flow control), that is, there is a lack of precision throttling technical solutions that can simultaneously solve the precision control of large and small flows in the existing technology.

[0006] In addition, due to the limitation of the characteristics of the driving device (such as a servo motor) itself, the overall size of the throttling device is too large, which limits the installation space and increases the manufacturing cost, and also poses great challenges to the high-precision regulation and control of small flow range changes. SUMMARY

[0007] In view of the deficiencies of the existing technology, the purpose of the present application is to provide a precision throttling device and method with adjustable taper and cross section, which can realize the adjustment of the size of the throttling hole diameter, and also realize the adjustment of the taper angle of the taper surface formed by the taper adjustment plate.

[0008] In order to achieve the above purpose, the present application is realized by the following technical solutions:

[0009] The utility model provides a precision throttling device with adjustable taper and cross section, which comprises a shell, an inlet and an outlet are arranged on the shell, a throttling hole adjusting mechanism is arranged in the shell near the outlet of the shell, the throttling hole adjusting mechanism is formed with a throttling hole communicated with the inlet and the outlet, the throttling hole adjusting mechanism can realize the adjustment of the size of the throttling hole, the side of the throttling hole adjusting mechanism away from the outlet of the shell is movably connected with a plurality of taper adjusting plates, the plurality of taper adjusting plates surround a guide flow channel, the guide flow channel is a conical structure, a taper adjusting part is arranged in the shell, the taper adjusting part is connected with the taper adjusting plates, a first driving mechanism is arranged between the taper adjusting part and the shell, an inflow pipe is arranged in the shell, one end of the inflow pipe is connected with the inlet of the shell, the other end of the inflow pipe is in sealing contact with the inner side of the plurality of taper adjusting plates, and the first driving mechanism drives the taper adjusting part to move axially relative to the shell to adjust the taper angle of the guide flow channel.

[0010] The utility model provides a precision throttling device with adjustable taper and cross section, the inner wall of the shell is fixed with a taper adjusting track, the taper adjusting track is provided with at least two places and is uniformly arranged along the circumference of the shell, the taper adjusting part is a taper adjusting ring, the taper adjusting ring is clamped into the taper adjusting track, and the first driving mechanism is installed on the taper adjusting ring.

[0011] The utility model provides a precision throttling device with adjustable taper and cross section, the taper adjusting ring is lower than the top end of the taper adjusting track, the taper adjusting ring is connected with the taper adjusting plate through a taper plate support rod, and the side of the taper adjusting plate close to the adjacent taper adjusting plate is provided with a sealing strip.

[0012] The utility model provides a precision throttling device with adjustable taper and cross section, the first driving mechanism is a linear stick -slip feed mechanism, the linear stick -slip feed mechanism includes a first ceramic driver, one side of the first ceramic driver is provided with a first rotary part, the other side of the first ceramic driver is provided with a first telescopic part, the driving end of the first ceramic driver is connected with a first moving end, and the first moving end is in contact with the taper adjusting track.

[0013] The utility model provides a precision throttling device with adjustable taper and cross section, the shell comprises a shell and a cover, the shell supports the throttling hole adjusting mechanism, the cover is provided with an inner hole, the hole wall of the inner hole of the cover is in sealing connection with the inflow pipe, the inflow pipe is provided with a spring fixing ring in the annular direction, and the spring is arranged between the end of the inner hole of the cover and the spring fixing ring to provide compression force to the inflow pipe.

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

[0015] The utility model provides a precision throttling device with adjustable taper and cross section, the inflow pipe is fixed with a reciprocating support frame in the annular direction, the side of the reciprocating support frame towards the taper adjusting plate is movably provided with a roller, and the roller can be in contact with the inner side of the taper adjusting plate.

[0016] The precision throttling device with adjustable taper and cross section as described above, the throttling hole adjusting mechanism comprises a shutter stand, a shutter fixed plate and a shutter rotating plate, the shutter fixed plate is fixed in the housing near the outlet side of the housing, the shutter stand comprises a plurality of wedge-shaped shutter bodies, the adjacent two shutter bodies are arranged in close contact, the center of the shutter stand forms the throttling hole, the two ends of the shutter rotating column are respectively inserted into the first sliding channel of the shutter fixed plate and the second sliding channel of the shutter rotating plate, a second driving mechanism is further arranged between the shutter rotating plate and the inner wall of the housing, the second driving mechanism drives the rotation of the shutter rotating plate relative to the housing, and further drives the movement of the shutter rotating column to realize the adjustment of the size of the throttling hole.

[0017] The precision throttling device with adjustable taper and cross section as described above, the second driving mechanism is a circumferential stick-slip feeding mechanism, the circumferential stick-slip feeding mechanism comprises a second ceramic driver, a second rotating part is arranged on one side of the second ceramic driver, a second telescopic part is arranged on the other side of the second ceramic driver, the fixed end of the second ceramic driver is connected with the shutter rotating plate, the driving end of the second ceramic driver is connected with the second moving end, and the second moving end is in contact with the inner wall of the housing.

[0018] The precision throttling device with adjustable taper and cross section as described above, the shutter rotating column is connected with the corresponding taper adjusting plate through a connecting piece spring, a supporting bearing is arranged between the shutter rotating plate and the inner wall of the housing, the supporting bearing is located below the second driving mechanism, and the second driving mechanisms are arranged in pairs and symmetrically arranged along the central axis of the housing.

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

[0020] The fluid enters through the housing inlet, flows through the inlet pipe into the plurality of taper adjusting plates and enters the throttling hole, and the size of the throttling hole can be adjusted through the throttling hole adjusting mechanism;

[0021] The taper adjusting member is connected with the taper adjusting plate, the first driving mechanism drives the axial movement of the taper adjusting member relative to the housing, and then the inclination angle of the taper adjusting plate relative to the center line of the housing changes, so that the angle of the plurality of taper adjusting plates forming the conical surface changes.

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

[0023] 1) The present invention has a compact overall structure. A throttle adjustment mechanism and a guide flow channel are disposed within the housing. The guide flow channel is assembled from multiple taper adjustment plates. A taper adjustment member connected to the taper adjustment plate is disposed within the housing. A first drive mechanism is disposed between the taper adjustment member and the housing. The operation of the first drive mechanism drives the taper adjustment member to rotate relative to the housing, thereby adjusting the taper angle of the guide flow channel. This allows for real-time adjustment of the taper angle of the guide flow channel to reduce fluid resistance. The throttle adjustment mechanism also cooperates with the throttle adjustment mechanism to adjust the size of the throttle aperture, effectively improving the static and dynamic performance of the fluid during throttling and ensuring precise fluid control accuracy.

[0024] The size of the guide channel and throttle hole can be increased or decreased according to application requirements to make it suitable for precision 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. In this way, the taper adjustment track provides a reaction force to the first driving mechanism, so that the taper adjustment ring drives the adjustment of the angle of the taper adjustment plate relative to the central axis of the shell.

[0026] 3) In the present invention, the first drive mechanism is a linear stick-slip mechanism, and the second drive mechanism is a circumferential stick-slip feed mechanism. The telescopic parts and the rotating parts in the two constitute a flexible mechanism. The moving ends of both 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 changes in flow rate, solving the defects of the existing technology such as limited installation space and increased manufacturing costs 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. In this way, the shutter body moves along the first slide and the second slide to achieve the movement of the limited shutter body, thereby adjusting the size of the throttle hole between the shutter bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, 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 structure schematic diagram of a taper and cross-section adjustable precision throttling device according to one or more embodiments of the present application.

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

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

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

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

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

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

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

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

[0038] In the figure: the mutual distance or size is exaggerated to show the position of each part, and the schematic diagram is only illustrative.

[0039] Among them: 1, the shell;

[0040] 2, shutter fixed plate; 201, fixed plate upper end face; 202, linear track;

[0041] 3, shutter column; 301, shutter rotation column; 302, shutter body; 303, shutter rotation column;

[0042] 4, shutter rotation plate; 401, arc-shaped track;

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

[0044] 6. Taper adjusting track; 601. Mounting hole; 602. Mounting surface; 603. Supporting surface;

[0045] 7. Spring fixing ring;

[0046] 8. Supporting spring;

[0047] 9. Cover; 901. Cover inner hole wall;

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

[0049] 11. Taper adjusting plate; 1101. Metal supporting plate; 1102. Connecting hole; 1103. Connecting piece spring; 1104. Rubber sealing strip;

[0050] 12. Taper plate supporting rod; 1201. Ball joint; 1202. Rod body;

[0051] 13. Taper adjusting component; 1301. Circumferential surface; 1302. Connecting hole; 1303. Groove contact surface;

[0052] 14. Circumferential stick-slip feed mechanism; 1401. Second mounting plate; 1402. Second rotary 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. Supporting bearing; 1501. Bearing inner ring; 1502. Bearing outer ring;

[0054] 16. Pressure sensor;

[0055] 17. Reciprocating supporting frame; 1701. Inner circumferential surface; 1702. Mounting hole; 1703. Wheel shaft; 1704. Roller; 1705. Wheel frame. DETAILED DESCRIPTION

[0056] It should be noted that the following detailed description is illustrative only, and is intended to provide further description in connection with the application. 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.

[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 clearly indicated 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 "comprising" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or their combinations;

[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, referring to Figure 1 As shown, a precision throttling device with adjustable taper and cross-section includes a shell, an inlet and an outlet are provided in the shell, a throttling hole adjustment mechanism is provided in the shell near the shell outlet, a throttling hole connected to the inlet and the outlet is formed at the throttling hole adjustment mechanism, and the throttling hole adjustment mechanism can adjust the size of the throttling hole, and the throttling hole adjustment mechanism is movably connected to multiple taper adjustment plates 11 on the side away from the shell outlet, and the multiple taper adjustment plates 11 are surrounded to form a guide flow channel, and the guide flow channel is a cone-like structure. A taper adjustment member 13 is provided inside the shell, and the taper adjustment member 13 is connected to the taper adjustment plate 11. A first driving mechanism is provided between the taper adjustment member 13 and the shell, and an inlet pipe 10 is provided in the shell, one end of the inlet pipe 10 is connected to the shell inlet, and the other end of the inlet pipe 10 is in sealing contact with the inner side surfaces of the multiple taper adjustment plates 11. The action of the first driving mechanism drives the taper adjustment 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 to 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. The inner hole wall surface 901 of the cover body 9 is installed with high precision in cooperation with the outer circumferential surface of the inlet pipe 10 to realize the reciprocating movement of the inlet pipe 10; the reciprocating support frame 17 is fixedly connected to 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 provided in the middle section of the inlet pipe 10, and the spring fixing ring 7 is fixedly connected to the inlet pipe 10. The support spring 8 is installed between the spring fixing ring 7 and the inner ring of the cover body 9 to provide support 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 provided on the 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 the controller, which can be a PLC controller or an existing microcontroller. The controller is separately connected to the first drive mechanism and the second drive mechanism 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, whose 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. Both rubber rings are conical rubber rings. Under the action of fluid pressure, the first rubber ring 1001 is tightly fitted with the wall surface 901 of the inner hole of the cover body, and the second rubber ring 1002 is tightly fitted with the approximate conical surface formed by the tapered adjustment plates 11 evenly distributed around the circumference to ensure sealing performance. The number and size of the tapered adjustment plates 11 must be set to meet the roundness requirements of the formed approximate conical surface 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 the side of the shell near the shell outlet. The shutter column 3 includes multiple wedge-shaped shutter bodies 302. The number of shutter bodies can be determined according to the roundness requirements of the throttle hole, generally 10-14. The side surfaces of two adjacent shutter bodies 302 are fitted together, and a throttle hole is formed in the center of the throttle adjustment mechanism. The throttle hole is a polygonal hole.

[0065] It should be noted that the reference Figure 4 As shown, there are multiple taper adjustment plates 11, and the number of taper adjustment plates is the same as the number of shutter columns 3. Adjacent taper adjustment plates 11 are in contact with each other and are staggered, so that multiple taper adjustment plates 11 are surrounded to form a conical surface (approximately a conical surface). 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 adjacent metal support plates 1101 is bent under force.

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

[0067] As can be easily understood, the taper adjustment ring (ring) is arranged below the taper adjustment track 6, the taper adjustment ring is arranged below the taper adjustment plate 11 away from the one end of the throttle hole adjusting mechanism, the shutter stand 3 is consistent with the number of the taper adjustment plate 11 and the taper plate support rod 12, and is uniformly arranged along the circumferential direction, and the inner wall of the taper adjustment plate 11 is attached to the lower end of the flow pipe 10;

[0068] Among them, the taper adjustment plate 11 is connected with the shutter stand 3 one by one, the taper adjustment plate 11 is connected with the taper adjustment ring 13 through the taper plate support rod 12, the taper adjustment ring 13 is located in the outer ring direction of the taper adjustment plate 11; the linear stick-slip feeding mechanism 5 is fixedly connected to the taper adjustment ring 13, 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 feeding mechanism 5, is uniformly distributed along the circumferential direction and is correspondingly installed with the taper adjustment track 6;

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

[0070] Reference Figure 7 As shown, the outer circumferential surface of the taper adjustment ring 13 is processed with a groove for cooperation with the taper adjustment track 6, the number of the groove corresponds to the number of the taper adjustment track 6, the size of the groove is consistent with the taper adjustment track 6 and has a sliding gap, the taper adjustment track can be clamped into the groove of the taper adjustment ring 13, and the contact surface 1303 in contact with the taper adjustment track 6 is provided with a friction-reducing coating to reduce the friction;

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

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

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

[0074] In this embodiment, the taper adjusting ring 13 is fixedly connected with the linear stick-slip feeding mechanism 5. The moving end of the linear stick-slip feeding mechanism 5 contacts one side surface of the taper adjusting track 6. The contact surface is processed to increase the friction. A plurality of linear stick-slip feeding mechanisms 5 drive the taper adjusting ring 13 to reciprocate along the taper adjusting track 6 by means of the friction.

[0075] Specifically, referring to Figure 8As shown, the straight-line stick-slip feeding mechanism 5 includes a first mounting plate 501, which is fixedly connected with the taper adjustment ring 13. The first mounting plate 501 is provided with a first piezoelectric ceramic 504 on one side. The first mounting plate 501 is provided with a first telescopic component 502 and a first rotary component 505 on the two sides of the first piezoelectric ceramic, respectively. The first telescopic component 502 and the first rotary component 505 are connected to a first connecting plate 507 at the ends away from the first mounting plate and the driving end of the first piezoelectric ceramic. The first connecting plate 507 is provided with a first extension plate 506 at the end beyond the first telescopic component 502. The first extension plate 506 is arranged at a distance from the telescopic component. The end of the first extension plate 506 away from the first connecting plate forms a first moving end 503, which protrudes from the first extension plate to contact the taper adjustment track 6. The first telescopic component 502 and the rotary component 505 constitute a compliant mechanism. The first piezoelectric ceramic 504 is driven by a control signal, so that the first moving end 503 in the stick-slip feeding mechanism 5 moves 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 shell 1, and the two do not move relative to each other. The shutter fixing plate 2 supports the shutter upright column 3. The shutter upright column 3 supports the shutter rotary plate 4 through a support bearing 15. The support bearing 15 is a thin-walled bearing.

[0077] Reference 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. The shutter body is provided with a convex part at the end away from the throttle hole. Each shutter body 302 has a set height. One end of the shutter body 302 is provided with a shutter rotary column 301. The other end is provided with a shutter rotary column 303. The shutter rotary column 301 is inserted into the first track, i.e., the arc-shaped track 401 in the shutter rotary plate 4. The shutter rotary column 303 is inserted into the second track, i.e., the straight-line track 202 in the shutter fixing plate 2. The bottom surface of the shutter body 302 is attached to the upper end surface 201 of the shutter fixing plate 2.

[0078] It should be noted that the circumferential stick-slip feeding mechanism 14 is uniformly distributed on the circumferential side of the shutter rotary plate 4. The circumferential stick-slip feeding mechanism 14 can be provided with two parts. The circumferential stick-slip feeding mechanism 14 forms relative motion with the inner circumferential surface of the shell 1 to drive the throttle hole adjusting mechanism to adjust the size of the throttle hole. The shutter rotary plate 4 is fixedly connected with the inner ring 1501 of the support bearing. The outer ring 1502 of the support bearing is fixedly connected with the circumferential inner surface of the shell 1. The support bearing is located below the circumferential stick-slip feeding mechanism 14.

[0079] Reference Figure 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. The side of the second mounting plate 1401 away from the shutter rotating plate 4 is connected with a second connecting plate 1406, and the second connecting plate 1406 is connected with a second piezoelectric ceramic 1405. The two sides of the second piezoelectric ceramic are respectively provided with a second telescopic component 1404 and a second rotating component 1402. The end 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 a third connecting plate 1407. The third connecting plate 1407 is provided with a second extension rod 1408 at the end of the second telescopic component 1404. The second extension rod 1408 is arranged at a distance from the second telescopic component. The end of the second extension rod away from the third connecting plate 1407 forms a second moving end 1403. The second moving end 1403 protrudes from the second extension rod to contact the inner wall of the shell 1. The second telescopic component 1404 and the second rotating component 1402 form a compliant structure. The second piezoelectric ceramic 1405 is driven by a control signal to make the second moving end 1403 in the circumferential stick-slip feeding mechanism 14 move 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 and both include multiple S-shaped structures to ensure the movement range of the two components. The first rotating component and the second rotating component have the same structure and both are lever amplification structures.

[0081] In addition, the embodiment also provides a working method of the precision throttling device with adjustable taper and cross section, which includes the following contents.

[0082] Fluid such as gas or liquid enters through the shell inlet, flows through the inlet pipe 10 into multiple taper adjusting plates 11 and enters the throttling hole. The circumferential stick-slip feeding mechanism 14 in the throttling hole adjusting mechanism drives the shutter rotating plate 4 to move. Because 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, so that the size of the throttling hole is adjusted.

[0083] The taper adjusting ring is connected with the taper adjusting plate 11. The linear stick-slip feeding mechanism 5 drives the taper adjusting component to move axially relative to the shell, so that the inclination angle of the taper adjusting plate 11 relative to the center line of the shell changes, thereby changing the angle of the multiple taper adjusting plates 11 forming the conical surface.

[0084] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A precision throttling device with adjustable taper and cross-section, characterized in that: The invention comprises a shell, wherein the shell is provided with an inlet and an outlet, a throttle hole adjustment mechanism is provided 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, and the throttle hole adjustment mechanism can adjust the size of the throttle hole, and the throttle hole adjustment mechanism is movably connected with a plurality of tapered adjustment plates on a side away from the shell outlet, and the plurality of tapered adjustment plates are surrounded to form a guide flow channel, and the guide flow channel is a cone-like structure, a taper adjustment member is provided inside the shell, the taper adjustment member is connected to the taper adjustment plate, a first driving mechanism is provided between the taper adjustment member and the shell, an inlet pipe is provided in the shell, one end of the inlet pipe is connected to the shell inlet, and the other end of the inlet pipe is in sealing contact with the inner side surfaces of the plurality of tapered adjustment plates, and the first driving mechanism drives the taper adjustment member to move axially relative to the shell to adjust the cone angle of the guide flow channel; A taper adjustment track is fixed to the inner wall of the housing. The taper adjustment track is provided at least two times and is evenly arranged along the circumference of the housing. The taper adjustment member is a taper adjustment ring. The taper adjustment ring is inserted into the taper adjustment track. The first driving mechanism is mounted on the taper adjustment ring. The driving end of the first driving mechanism contacts the taper adjustment track. 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.

2. A precision throttling device with adjustable taper and cross-section according to claim 1, 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 provided on one side of the first ceramic driver, and a first telescopic component is provided 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.

3. A precision throttling device with adjustable taper and cross-section according to claim 1, characterized in that: The housing includes 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 wall of the inner hole of the cover body is sealed 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 provided at the shell outlet.

4. A precision throttling device with adjustable taper and cross-section according to claim 1, characterized in that: A reciprocating support frame is fixed in the annular direction of the inlet pipe. A roller is movably provided on the reciprocating support frame toward one side of the taper adjustment plate. The roller can contact the inner side surface of the taper adjustment plate.

5. A precision throttling device with adjustable taper and cross-section according to claim 1, characterized in that: The throttle adjustment mechanism includes a shutter column, a shutter fixing plate and a shutter rotating plate. The shutter fixing plate is fixed on the side of the shell near the shell outlet. The shutter column includes multiple wedge-shaped shutter bodies. Two adjacent shutter bodies are arranged in a 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 slide of the shutter fixing plate and the second slide 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 adjustment of the aperture size of the throttle hole.

6. A precision throttling device with adjustable taper and cross-section according to claim 5, 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 provided on one side of the second ceramic driver, and a second telescopic component is provided 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.

7. A precision throttling device with adjustable taper and cross-section according to claim 5, characterized in that: 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. The second driving mechanism is arranged in pairs and symmetrically along the central axis of the shell.

8. A method for operating a precision throttling device with adjustable taper and cross-section according to any one of claims 1 to 7, characterized in that: 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 multiple taper adjustment plates.

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