Nozzle baffle type nonlinear electrical converter

Abstract

The invention discloses a nozzle baffle type nonlinear electrical converter which comprises a base, an electromagnetic unit and an air injection unit. A supporting frame is fixed to one end of the base. The electromagnetic unit comprises a magnetic field generator, a flexible hinge and an armature; the magnetic field generator generates a magnetic field air gap in the frame body of the support frame; the flexible hinge is fixed on the support frame; the armatures are arranged in parallel, one end, close to the support frame 101, of each armature is a magnetic end, and the other end of each armature is a swinging end; the middles of the armatures are fixed to the flexible hinge, the magnetic ends are inserted into the magnetic field air gap, and the swing ends can swing around the flexible hinge in the top plane direction of the base. The air injection unit comprises an offset baffle and a nozzle; the offset baffle is fixed to the swing end. The nozzle is fixed to the top face of the base, the air inlet end communicates with an air compression pipeline controlling the executing mechanism, and the air spraying end corresponds to the offset baffle. Linear motion of the offset baffle is changed into swing motion, and the problems of concentricity, abrasion and stroke of the converter are effectively solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial automation pneumatic control, and more particularly to a conversion unit for converting electrical signals into pneumatic pressure signals, and particularly to an electro-pneumatic conversion unit based on the principle of nozzle flapper. BACKGROUND

[0002] In process control, electro-pneumatic converters (E / P converters) are used to convert electrical signals (such as 4-20 mA) output by controllers into pneumatic pressure signals (such as 100-400 kPa) to drive pneumatic actuators. Traditional electro-pneumatic converters mostly use linear motion nozzle flapper mechanisms, in which the flapper moves linearly towards or away from the nozzle under the action of electromagnetic force.

[0003] The linear motion flapper mechanism has some inherent shortcomings. First, the concentricity between the flapper and the nozzle requires high precision, and the assembly precision is difficult to guarantee, which is prone to side wear and lateral force, affecting the service life and linearity. Second, the displacement stroke of the electro-mechanical converter (such as a moving iron electromagnet) used for driving is small, which limits the adjustment range of the output air pressure. Finally, the structure usually requires a guide mechanism, which increases complexity and cost.

[0004] Therefore, there is a need for a nonlinear electro-pneumatic converter to overcome the shortcomings of the linear motion flapper mechanism. SUMMARY

[0005] In view of the above, the present application provides a nozzle flapper type nonlinear electro-pneumatic converter, which effectively solves the problems of converter concentricity, wear and stroke by changing the linear motion of the biased flapper to swinging motion.

[0006] To achieve the above purpose, the present application adopts the following technical solutions: A nozzle flapper type nonlinear electro-pneumatic converter, comprising: a base, one end of the top surface of the base is fixed with a support frame; an electromagnetic unit, the electromagnetic unit includes a magnetic field generator, a flexible hinge and an armature; the magnetic field generator is installed on the base corresponding to one side of the support frame and generates a magnetic field air gap in the support frame; the flexible hinge is fixed on the support frame; the number of armatures is multiple, the multiple armatures are arranged in parallel, one end of the armature close to the support frame is a magnetic end, and the other end is a swinging end; the middle of the opposite surfaces of the two adjacent armatures is fixed with the flexible hinge, and the magnetic end is inserted into the magnetic field air gap, and the swinging end can swing around the flexible hinge in the direction of the top surface of the base; The jet unit comprises a bias baffle and a nozzle; the bias baffle is fixed at the swing end; the nozzle is fixed at the top surface of the base far from the support frame; the air inlet end of the nozzle is communicated with the air pressure pipeline of the control execution mechanism, and the air outlet end corresponds to the bias baffle; the swing of the armature can change the gap between the baffle and the nozzle to adjust the air outlet amount of the nozzle, and then change the air pressure in the air pressure pipeline to make the valve rod in the air chamber of the execution mechanism move due to the pressure change.

[0007] The beneficial effects of the technical scheme are that the magnetic field is generated by the electromagnetic unit, the magnetic end of the armature is located in the magnetic field gap, and the swing end of the armature can be driven to swing around the flexible hinge under the action of the magnetic force; the bias baffle is fixed at the swing end of the armature and can swing synchronously with the armature; the gap between the baffle and the nozzle changes during the swing, so that the air outlet amount of the nozzle changes; the change of the air outlet amount of the nozzle causes the air pressure in the air pressure pipeline to change, and then the valve rod in the air chamber of the execution mechanism moves due to the pressure change.

[0008] Preferably, the magnetic field generator comprises a permanent magnet, an electromagnetic coil, a magnetic guide column and a magnetic sheet; the permanent magnet is fixed in the middle of the base and corresponds to the lower side of the swing end; the permanent magnet has a gap with the bottom surface of the armature corresponding to the swing end; the electromagnetic coil generates magnetic force after being electrified, and the magnetic poles at both ends thereof are opposite; the number of the magnetic guide columns is two, one end of each of the two magnetic guide columns is fixed at both ends of the electromagnetic coil to transmit the magnetic force; the number of the magnetic sheets is two, the two magnetic sheets are symmetrically arranged and fixed on the support frame, and the opposite ends of the two magnetic sheets form the magnetic field gap; one end of each of the two magnetic sheets far from the magnetic field gap is fixed corresponding to the other end of each of the two magnetic guide columns. The permanent magnet gives the initial magnetic pole to the magnetic end of the armature, the magnetic poles at both ends of the electromagnetic coil are opposite after being electrified, the magnetic force is transmitted to the magnetic field gap through the magnetic guide column and the magnetic sheet, and the magnetic end of the armature generates attractive force and repulsive force between the two magnetic sheets in the magnetic field gap, and the swing end of the armature is driven to swing around the flexible hinge as the center.

[0009] Preferably, the electromagnetic coil comprises a shell and an iron core, the iron core is fixed in the shell and extends out of the shell at both ends; the iron core is wound with a wire, and the wire is electrically connected to the control panel; one end of each of the two magnetic guide columns is fixed perpendicularly to both ends of the iron core. According to the winding mode and the current direction of the wire on the iron core, the magnetic poles at both ends of the iron core are opposite. By changing the current excited by the wire, the magnetic field change can be affected, the armature is deflected clockwise, the bias baffle is close to the nozzle, the pressure in the air pressure pipeline connected with the nozzle rises, and finally the relationship between the current and the changed pressure is obtained, which has a linear segment and a nonlinear segment.

[0010] Preferably, the deflection angle θ of the offset baffle and the effective throttling area A of the gas jet end of the nozzle form a preset nonlinear relationship, so as to compensate for the inherent nonlinearity of the gas source, so that the input current I of the electromagnetic coil and the output back pressure P_out of the converter have a linear characteristic. By designing the profile of the working edge of the offset baffle, the mechanical geometry itself is used to compensate for the conversion nonlinearity, and the performance is stable.

[0011] Preferably, the swing end of the armature is fixed with a folded plate, and the plate surface of the folded plate is parallel to the upper surface of the permanent magnet. By increasing the effective action area between the armature and the permanent magnet through the folded plate, the armature can realize precise swinging according to the magnetic force change in the magnetic field air gap.

[0012] Preferably, the electromagnetic unit further comprises a connecting plate, one end of the connecting plate is fixed with the middle part of the armature, and the other end extends along the swing end; the offset baffle is fixed at the end of the connecting plate away from the armature. The connecting plate is fixed with the armature, and the connecting plate is directly fixed with the offset baffle, forming a direct driving structure without intermediate transmission components.

[0013] Preferably, it further comprises an adjusting member, the adjusting member comprises an elastic member and an adjusting bolt; the top surface of the base is fixed with a connecting seat, the two ends of the elastic member are respectively abutted with the two surfaces of the connecting plate and the connecting seat opposite to each other; the adjusting bolt penetrates the connecting seat and is fixed with the elastic member to adjust the distance between the connecting plate and the nozzle. Rotating the adjusting bolt can adjust the exposed length of the adjusting bolt on the connecting seat, and the elastic force of the elastic member can push the connecting plate, thereby adjusting the initial distance between the offset baffle and the nozzle, so as to adjust the movement amount of the actuator valve rod.

[0014] Preferably, the flexible hinge comprises an integrally formed fixed segment and a torsion segment; the two ends of the fixed segment have flanges and are fixed on the support frame; the torsion segment is fixed with the armature. The torsion segment of the flexible hinge is fixed with the armature, and the fixed segment serves as the swing center axis of the armature and the torsion segment.

[0015] Preferably, the support frame comprises a lower support and an upper support; the lower support is fixed on the bottom surface of the base; the upper support is located above the lower support; the two flanges are respectively fixed with the side walls of the upper support and the lower support; the tensioning bolt threadedly connects the upper support and the lower support to adjust the relative distance between the upper support and the lower support, thereby adjusting the tension of the fixed segment. After the tensioning bolt penetrates the upper support, it can push against the lower support, and by rotating the tensioning bolt, the distance between the upper support and the lower support can be adjusted, thereby adjusting the tension of the fixed segment of the flexible hinge. Not only can the hinge performance be improved, but also the anti-vibration performance can be enhanced, so that the armature can realize more precise rotation.

[0016] Preferably, the jet unit further includes a body, which is fixed to the base, and the nozzle is embedded in the body. The nozzle is mounted through the body.

[0017] As can be seen from the above technical solution, compared with the prior art, the present invention discloses a nozzle-baffle type nonlinear electrical converter, which has the following beneficial effects: 1. The bias baffle is driven by the armature to swing. The swing motion does not require the bias baffle and the nozzle to be extremely concentric. It has good assembly processability, avoids uneven wear, and has a longer service life.

[0018] 2. Oscillating motion can provide a greater effective displacement stroke than linear motion, thus potentially achieving a wider voltage regulation range or higher resolution.

[0019] 3. The direct drive method of the offset baffle eliminates intermediate transmission mechanisms such as levers and hinges, reducing the number of parts and potential failure points.

[0020] 4. By designing the profile of the working edge of the offset baffle, the mechanical geometry itself is used to compensate for the nonlinearity of the conversion, resulting in stable performance. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the converter structure provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure after removing the top cover; Figure 3 This is an exploded view of the converter provided by the present invention; Figure 4 This is a schematic diagram of the offset baffle motion trajectory provided by the present invention; Figure 5 A schematic diagram of the flexible hinge structure provided by the present invention; Figure 6 This is a schematic diagram of the armature structure provided by the present invention; Figure 7 This invention provides an air gap arrangement diagram between the baffle and the nozzle. Figure 8 A schematic diagram of the baffle blocking nozzle provided by the present invention; Figure 9A schematic diagram of the armature and flexible hinge assembly structure provided by the present invention; Figure 10 This is a schematic diagram of the converter control system provided by the present invention.

[0023] Among them, 10-base; 101-support frame; 1011-upper bracket; 1012-lower bracket; 102-magnet fixing seat; 103-tensioning bolt; 104-adjusting bolt; 105-elastic element; 1051-first spring; 1052-second spring; 106-top cover; 107-connecting seat; 20-electromagnetic unit; 21-magnetic field generator; 211-permanent magnet; 212-shell; 213-iron core; 214-magnetic guide post; 215-magnetic sheet; 216-magnet mounting plate; 22-armature; 221-magnetic end; 222-swinging end; 223-folding plate; 23-flexible hinge; 231-fixed section; 232-torsion end; 24-connecting plate; 30-jet unit; 31-nozzle; 32-offset baffle; 33-body; Detailed Implementation The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] According to an embodiment of the present invention, a nozzle-baffle type nonlinear electrical converter effectively solves the problems of concentricity, wear, and stroke by changing the linear motion of the bias baffle to an oscillating motion. Figure 1As shown in Figure 4, the system includes a base 10, an electromagnetic unit 20, and a jet unit 30. A support frame 101 is fixed to one end of the top surface of the base 10. The electromagnetic unit 20 includes a magnetic field generator 21, a flexible hinge 23, and armatures 22. The magnetic field generator 21 is mounted on the base 10 on the side corresponding to the support frame 101. When the magnetic field generator 21 is energized, it can generate magnetic force and create a magnetic field air gap within the frame of the support frame 101. By changing the current of the magnetic field generator 21, the magnetic poles at both ends of the magnetic field air gap can change. The flexible hinge 23 is fixed to the support frame 101. There are multiple armatures 22, which are arranged in parallel, with one end near the support frame 101 being a magnetic end 221 and the other end being a swing end 222. Adjacent armatures 22 are positioned opposite each other. The two surfaces are fixed to the middle of the flexible hinge 23, and the magnetic end 221 is inserted into the magnetic field air gap. The swing end 222 can swing around the flexible hinge 23 along the other end of the top surface of the base 10. The jet unit 30 includes a bias baffle 32 and a nozzle 31. The bias baffle 32 is fixed to the swing end 222. The nozzle 31 is fixed to the top surface of the base 10 away from the support frame 101. The air inlet end of the nozzle 31 is connected to the air compressor pipeline of the control actuator. The jet end corresponds to the bias baffle 32. The nozzle 31 continuously jets a fixed amount of air towards the bias baffle 32. The swing of the armature 22 can change the gap between the baffle 32 and the nozzle 31, thereby adjusting the air output of the nozzle 31, and thus changing the air pressure in the air compressor pipeline so that the valve stem in the air chamber of the actuator moves due to the pressure change. In this embodiment, there are two armatures 22 and two flexible hinges 23. Figure 3 and 9 As shown, two flexible hinges 23 are arranged side by side and sandwiched between two armatures 22. The armatures 22 and the flexible hinges 23 are connected by bolts. The flexible hinges 23 are fixed to the support frame 101. The magnetic end 221 of the armature 22 is located in the magnetic field air gap. Under the influence of the magnetic poles in the magnetic field air gap, the magnetic end 221 of the armature 22 can be attracted or repelled. In this process, the swing end of the armature 22 can be driven to swing around the flexible hinge 23 as the central axis. During the swing of the armature 22, the bias baffle 32 can be driven to swing synchronously, thereby changing the relative position relationship between the bias baffle 32 and the nozzle 31. By changing the position, the opening and closing degree of the nozzle 31 can be controlled, thereby adjusting the air pressure value in the air compressor pipeline, and finally causing the valve stem in the actuator air chamber to move due to the pressure change.

[0025] In this embodiment, the magnetic field generator 21 includes a permanent magnet 211, an electromagnetic coil, magnetic guide pillars 214, and magnetic sheets 215. The permanent magnet 211 is fixed in the middle of the base 10 and below the swing end 222. There is a gap between the permanent magnet 211 and the armature 22 corresponding to the bottom surface of its swing end 222. The electromagnetic coil generates magnetic force after being energized, and its two ends have opposite magnetic poles. There are two magnetic guide pillars 214, one end of each magnetic guide pillar 214 is fixed to the two ends of the electromagnetic coil to transmit magnetic force. There are two magnetic sheets 215, which are symmetrically arranged and fixed on the support frame 101. The opposite ends of the two magnetic sheets 215 form a magnetic field air gap. The ends of the two magnetic sheets 215 away from the magnetic field air gap are fixed to the other ends of the two magnetic guide pillars 214.

[0026] like Figure 2 As shown, after the electromagnetic coil is energized, it will be magnetized and present opposite magnetic poles at its two ends. The magnetic force at both ends of the electromagnetic coil is transmitted to the magnetic sheet 215 through the magnetic post 214. Two symmetrically arranged magnetic sheets 215 are inserted into the frame of the support frame 101. The opposite end faces of the two magnetic sheets 215 form a magnetic field air gap. Since the magnetic force is transmitted through the magnetic post 214, the magnetic poles on the two magnetic sheets 215 are also opposite. The magnetic end 221 of the armature 22 is inserted into the magnetic field air gap. When the permanent magnet 211 gives the armature 22 the initial magnetic pole, its magnetic end 221 attracts one of the magnetic sheets 215 and repels the other magnetic sheet 215 in the magnetic field air gap. The armature 22 is driven to swing around the flexible hinge 23 as the central axis by the action of magnetic force.

[0027] To further optimize the above technical solution, the electromagnetic coil includes a housing 212 and an iron core 213. The iron core 213 is fixed inside the housing 212, with both ends extending out of the housing 212. Wires are wound around the iron core 213, and these wires are electrically connected to a control board. One end of each of the two magnetic posts 214 is perpendicularly fixed to both ends of the iron core 213. The electromagnetic coil adopts a common electromagnet structure, formed by winding wires around an iron core 213 made of soft magnetic material. Identical magnetic posts 214 are connected to both ends of the iron core 213. The magnetic posts 214 are perpendicularly fixed to magnetic plates 215, and the two magnetic plates 215 form a first polarity end and a second polarity end, respectively. After an excitation power supply is applied to the wires, the two polarity ends are magnetized to form different polarities, and a specific air gap is maintained between them for isolation. When the excitation power supply control signal changes, the magnetic force at the first polarity end and the second polarity end changes accordingly. When the conductor receives the control signal (usually a low current of less than 1mA) provided by the main control board, the iron core 213 is magnetized, and N poles and S poles are formed at both ends of the iron core 213 according to the winding method of the conductor and the direction of the current.

[0028] In this embodiment, the side of the bias baffle 32 facing the nozzle 31 has a circular arc or involute shape in the circumferential direction, and the bias baffle 32 is provided with a lip to ensure effective closure of the nozzle 31. The deflection angle θ of the bias baffle 32 and the effective throttling area A of the nozzle 31 are in a preset nonlinear relationship to compensate for the inherent nonlinearity of the air source, so that the input current I of the electromagnetic coil and the output back pressure P_out of the converter can obtain good approximate linear characteristics over a large range without any external feedback.

[0029] To further optimize the above technical solution, the electromagnetic unit 20 also includes a connecting plate 24, one end of which is fixed to the middle of the armature 22, and the other end extends along the swing end 222; the offset baffle 32 is fixed at the end of the connecting plate 24 away from the armature 22.

[0030] The principle of this embodiment is that when the electromagnetic coil is energized, the input current causes the connecting plate to deflect at an angle proportional to the current. The connecting plate directly drives the bias baffle to swing. As the bias baffle swings, the relative position between its specially shaped working edge (the side of the bias baffle facing the nozzle) and the nozzle outlet changes, thereby linearly changing the airflow throttling area. The change in the throttling area causes a change in the nozzle back pressure (i.e., the output pressure), ultimately realizing the conversion from electrical signal to pneumatic pressure.

[0031] The armature 22 rotates around the flexible hinge 23. Its magnetic end 211 is endowed with either an N or S pole by a permanent magnet 211, and the polarized end 211 is installed between the first polarized end and the second polarized end. The first polarized end and the second polarized end are respectively magnetized by the different polarized ends of the iron core 213, so that the magnetic end 221 of the armature 22 generates a repulsive force with the first polarized end and an attractive force with the second polarized end, driving the armature 22 to rotate around the flexible hinge 23.

[0032] In this embodiment, the flexible hinge 23 includes an integrally formed fixed section 231 and a torsion section 232; the fixed section 231 has flanges at both ends and is fixed to the support frame 101; the torsion section 232 is bolted to the armature 22.

[0033] The flexible hinge 23, serving as the rotation center of the armature 22, adopts a straight-circular flexible hinge structure, forming a flexible rotation area by combining a fixed section and a torsion section. If a rectangular or circular hinge is used, fixed holes must be provided at both ends of the cross. Excessive distance between the fixed end and the fixed hole will cause the armature 22 to wobble, affecting precision control; insufficient distance will increase friction, also hindering precision control. Furthermore, foreign objects adhering between the fixed end and the fixed hole will reduce the armature's operational performance. In this invention, the straight-circular flexible hinge has parallel sides on the torsion section to limit the rotation direction, ensuring that the armature 22 rotates only around a single axis.

[0034] likeFigure 5 As shown, in this embodiment, the fixed section 231 of the flexible hinge 23 is dumbbell-shaped, with flanges at both ends used to fix the flexible hinge 23 to the support frame 101. The flanges have fixing holes. The middle part of the fixed section 231 is a torsion shaft, which, after connecting to the flanges, forms the swing center of the armature 22, achieving the hinge function through its own elastic force. When the flange is fixed to the support frame 101, and the armature 22 rotates in a certain direction under magnetic force, the torsion section 232 twists, thus performing the hinge function.

[0035] The dumbbell-shaped hinge structure generates no friction, and the elastic deformation of the material exhibits good repeatability and stability, enabling high-precision rotation and control. Simultaneously, it provides a certain torsional restoring force, improving the reset response speed. To ensure the hinge's own elastic force, appropriate tension must be maintained along a single axis of rotation.

[0036] To further optimize the above technical solution, the support frame 101 includes a lower support 1012 and an upper support 1011; the lower support 1012 is fixed to the bottom surface of the base 10; the upper support 1011 is located above the lower support 1012; two flanges are fixed to the side walls of the upper support 1011 and the lower support 1012 respectively; the tensioning bolt 103 is threaded to the upper support 1011 and the lower support 1012 to adjust the relative distance between the upper support 1011 and the lower support 1012, thereby adjusting the tension of the fixing section 231.

[0037] To maintain tension in the flexible hinge, the flange is fixed to the upper bracket 1011 and the lower bracket 1012, respectively. A tensioning bolt 103 is installed between the upper bracket 1011 and the lower bracket 1012 to adjust the distance between them, thereby adjusting the tension of the fixed section 231 of the flexible hinge 23. When the tensioning bolt 103 rotates in a certain direction, the distance between the upper bracket 1011 and the lower bracket 1012 increases, achieving tension adjustment. The tensioning bolt 103 passes through the screw hole of the upper bracket 1011 and presses against the lower bracket 2023, so the distance between the upper and lower brackets can be precisely adjusted by rotating the tensioning bolt 103.

[0038] Adjusting the hinge tension not only improves the hinge performance but also enhances vibration resistance, enabling the armature to rotate more precisely. Meanwhile, to prevent external influences on the rotating components, top covers 106 are fixed to the top surfaces of both sides of the base 10. These top covers 106 enclose the jet unit 30, flexible hinge 23, connecting plate 24, and armature 22.

[0039] To further optimize the above technical solution and increase the effective interaction area between the permanent magnet 211 and the armature 22, such as... Figure 6 As shown, the swing end 222 of the armature 22 is fixed with a folding plate 223, and the plate surface of the folding plate 223 is parallel to the upper surface of the permanent magnet 211.

[0040] likeFigure 3 As shown, a magnet fixing seat 102 is fixed in the middle of the base 10. A square groove is opened on the magnet fixing seat 102. An assembly groove communicating with the square groove is opened on the bottom surface of the base 10. The permanent magnet 211 is fixed on the magnet mounting plate 216. The magnet mounting plate 216 is embedded in the assembly groove and the permanent magnet 211 is inserted into the magnet fixing seat 102 from the bottom surface of the base 10 and placed in the square groove. The permanent magnet 211 protrudes from the opening of the square groove and has a gap between it and the surface of the folding plate 223.

[0041] A permanent magnet 211 is arranged around the armature 22 with a certain gap to impart an initial magnetic pole (first polarity) to the magnetic end 221 of the armature 22. In order for the armature 22 to achieve precise rotation according to the magnetic force change between the first polarity end and the second polarity end, the inherent magnetic force of the armature 22 needs to be enhanced. This can be achieved by increasing the size of the permanent magnet 211 or increasing the contact area between the armature 22 and the permanent magnet 211. However, increasing the size of the armature 22 would make its precise rotation difficult to control. Therefore, the design of the armature 22 needs to be lightweight to improve the response sensitivity. Thus, by adding a folding plate 223 to the armature 22, the effective interaction area between the armature 22 and the permanent magnet 211 is increased, thereby increasing the initial magnetic force of the armature 22.

[0042] To further optimize the above technical solution, the jet unit 30 also includes a body 33, which is fixed on the base 10, and the nozzle 31 is embedded in the body 33.

[0043] To further optimize the above technical solution, an adjusting component is also included, which includes an elastic element 105 and an adjusting bolt 104; a connecting seat 107 is fixed on the top surface of the base 10, and the two ends of the elastic element 105 abut against the two opposing surfaces of the connecting plate 24 and the connecting seat 107, respectively; the adjusting bolt 104 passes through the connecting seat 107 and is fixed to the elastic element 105 to adjust the distance between the connecting plate 24 and the nozzle 31.

[0044] The opening and closing state of the nozzle 31 can be changed by fine adjustments of the adjusting component, thereby adjusting the movement of the valve stem. The connecting seat 107 is arranged correspondingly to the body 33. The offset baffle 32 is located between the connecting seat 107 and the body 33. One side of the offset baffle 32 has an insert that passes through the connecting plate 24 to fix the offset baffle 32 to the connecting plate 24. The elastic element 105 includes a first spring 1051. One end of the first spring 1051 abuts against the surface of the connecting plate 24, and the insert of the offset baffle 32 is inserted into the first spring 1051. The other end abuts against the end face of the connecting seat 107, and the threaded end of the adjusting bolt 104 is inserted into the first spring 1051 and fixed to the end of the first spring 1051 near the connecting seat 107. The adjusting bolt 104 controls the axial adjustment distance by adjusting the tightness, and the first spring 1051 pushes the offset baffle 32 with a certain elastic force. The tightening amount of the adjusting bolt 104 can adjust the distance between the threaded part of the adjusting bolt 104 and the bias baffle 32. The air gap between the bias baffle 32 and the nozzle 31 can be precisely adjusted by the elastic force of the first spring 1051, thereby improving the overall shock resistance.

[0045] To further optimize the above technical solution, the elastic element 105 also includes a second spring 1052. A support base is fixed between the body 33 and the support frame 101, and the two ends of the second spring 1052 are fixed to the support base and the two opposing surfaces of the connecting plate 24, respectively. When the armature 22 is not magnetized, the second spring 1052 pushes one side of the connecting plate 24 to keep the bias baffle 32 at a certain distance from the nozzle 31, ensuring that the nozzle 31 is in a fully open state.

[0046] When the nozzle is fully open, the air pressure supplied by the air source cannot reach the actuator air chamber (or pilot valve) and is discharged to the atmosphere through the nozzle. The pressure in the compressed air line drops to the minimum, the diaphragm of the actuator air chamber is at the lowest point, the valve stem connected to it is also at the lowest position, the valve seat of the valve body is completely closed by the valve core, and the flow through the valve seat is 0%.

[0047] When the nozzle is completely closed by the bias baffle, the pressure in the air compressor line reaches its maximum. The pressure is transmitted to the actuator air chamber, and the diaphragm rises to its highest position. At this time, the return spring in the actuator air chamber is compressed. When the diaphragm is at its highest point, the valve stem rises to its highest position simultaneously. The valve core in the valve body moves away from the valve seat, and the flow rate through the valve seat reaches 100%.

[0048] Through the above process, the opening and closing of the nozzle changes the air pressure in the compressed air pipeline, which in turn controls the valve flow rate by moving the linked valve stem. Therefore, the gap between the nozzle and the offset baffle is the key factor determining the fully open state of the nozzle, and this gap can be finely adjusted according to the different compressed air injection volumes of the nozzle to meet the usage requirements.

[0049] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0050] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nozzle-baffle type nonlinear electrical converter, characterized in that, include: The base (10) has a support frame (101) fixed at one end of its top surface. An electromagnetic unit (20) includes a magnetic field generator (21), a flexible hinge (23), and an armature (22). The magnetic field generator (21) is mounted on the base (10) on one side of the support frame (101) and generates a magnetic field air gap in the frame of the support frame (101). The flexible hinge (23) is fixed on the support frame (101). There are multiple armatures (22), which are arranged in parallel and have a magnetic end (221) near the support frame (101) and a swing end (222). The middle of the two opposing surfaces of two adjacent armatures (22) are fixed to the flexible hinge (23), and the magnetic end (221) is inserted into the magnetic field air gap. The swing end (222) can swing around the flexible hinge (23) along the top plane of the base (10). The jet unit (30) includes an offset baffle (32) and a nozzle (31); the offset baffle (32) is fixed to the swing end (222); the nozzle (31) is fixed to the top surface of the base (10) away from the support frame (101), the air inlet end of the nozzle (31) is connected to the air compressor pipeline of the actuator, and the jet end corresponds to the offset baffle (32); the swing of the armature (22) can change the gap between the baffle (32) and the nozzle (31) to adjust the air output of the nozzle (31), thereby changing the air pressure in the air compressor pipeline so that the valve stem in the air chamber of the actuator moves due to the pressure change.

2. The nozzle-baffle type nonlinear electrical converter according to claim 1, characterized in that, The magnetic field generator (21) includes a permanent magnet (211), an electromagnetic coil, magnetic posts (214), and magnetic sheets (215). The permanent magnet (211) is fixed in the middle of the base (10) and below the swing end (222). There is a gap between the permanent magnet (211) and the armature (22) corresponding to the bottom surface of its swing end (222). The electromagnetic coil generates magnetic force after being energized, and its two ends have opposite magnetic poles. There are two magnetic posts (214), and one end of each magnetic post (214) is fixed to the two ends of the electromagnetic coil to transmit magnetic force. There are two magnetic sheets (215), and the two magnetic sheets (215) are symmetrically arranged and fixed on the support frame (101). The two ends of the two magnetic sheets (215) opposite to each other form the magnetic field air gap. The ends of the two magnetic sheets (215) away from the magnetic field air gap are fixed to the other ends of the two magnetic posts (214).

3. A nozzle-baffle type nonlinear electrical converter according to claim 2, characterized in that, The electromagnetic coil includes a housing (212) and an iron core (213). The iron core (213) is fixed inside the housing (212) and its two ends extend out of the housing (212). A wire is wound around the iron core (213) and the wire is electrically connected to the control board. One end of the two magnetic posts (214) is fixed perpendicularly to the two ends of the iron core (213).

4. A nozzle-baffle type nonlinear electrical converter according to claim 3, characterized in that, The bias baffle (32) facing the nozzle (31) has a circular arc or involute shape on its circumferential side. The bias baffle (32) deflection angle θ and the effective throttling area A of the nozzle (31) are in a preset nonlinear relationship to compensate for the inherent nonlinearity of the air source, so that the input current I of the electromagnetic coil and the output back pressure P_out of the converter have linear characteristics.

5. A nozzle-baffle type nonlinear electrical converter according to claim 4, characterized in that, The swing end (222) of the armature (22) is fixed with a folding plate (223), and the plate surface of the folding plate (223) is parallel to the upper surface of the permanent magnet (211).

6. A nozzle-baffle type nonlinear electrical converter according to claim 1, characterized in that, The electromagnetic unit (20) also includes a connecting plate (24), one end of which is fixed to the middle of the armature (22), and the other end extends along the swing end (222); the offset baffle (32) is fixed to the end of the connecting plate (24) away from the armature (22).

7. A nozzle-baffle type nonlinear electrical converter according to claim 6, characterized in that, It also includes an adjusting component, which includes an elastic element (105) and an adjusting bolt (104); a connecting seat (107) is fixed on the top surface of the base (10), and the two ends of the elastic element (105) abut against the two opposing surfaces of the connecting plate (24) and the connecting seat (107); the adjusting bolt (104) passes through the connecting seat (107) and is fixed to the elastic element (105) to adjust the distance between the connecting plate (24) and the nozzle (31).

8. A nozzle-baffle type nonlinear electrical converter according to claim 1, characterized in that, The flexible hinge (23) includes an integrally formed fixed section (231) and a torsion section (232); the fixed section (231) has flanges at both ends and is fixed to the support frame (101); the torsion section (232) is bolted to the armature (22).

9. A nozzle-baffle type nonlinear electrical converter according to claim 8, characterized in that, The support frame (101) includes a lower support (1012) and an upper support (1011); the lower support (1012) is fixed to the bottom surface of the base (10); the upper support (1011) is located above the lower support (1012); the two flanges are respectively fixed to the side walls of the upper support (1011) and the lower support (1012); the tension bolt (103) is threaded to the upper support (1011) and the lower support (1012) to adjust the relative distance between the upper support (1011) and the lower support (1012) and thus adjust the tension of the fixed section (231).

10. A nozzle-baffle type nonlinear electrical converter according to claim 1, characterized in that, The jet unit (30) also includes a body (33), which is fixed on the base (10), and the nozzle (31) is embedded in the body (33).

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