CN201875258U - High-speed switch valve driven by actuator manufactured by rare-earth giant magnetostrictive material - Google Patents

Abstract

The utility model discloses a high-speed switch valve driven by an actuator manufactured by a rare-earth giant magnetostrictive material. The big magnetostriction of the magnetostrictive material in a magnetic field is used for manufacturing the actuator which is used for driving a hydraulic valve and realizing digital control on fluid flux and pressure. The high-speed switch valve driven by the actuator manufactured by the rare-earth giant magnetostrictive material is structurally divided into three parts, namely the actuator, a force transmission and displacement amplifying mechanism and a fluid control valve, wherein the actuator consists of a magnetostrictive stick, a coil, an actuator shell, a magnetizer, a coil frame and other parts; the force transmission and displacement amplifying mechanism consists of a push rod, a displacement amplifying spring, a platen, a force transmission ball, and the like; and the fluid control valve consists of a valve body, a belleville spring, a valve end cover and a valve core. The three parts are rigidly connected; then magnetostrictive stick outputs displacement and drive force when extending; and the displacement after being amplified by the displacement amplifying mechanism props against the valve core and open a valve mouth; and the vale mouth only workers under two states, namely opening and closing. The high-speed switch valve driven by the actuator manufactured by the rare-earth giant magnetostrictive material can adopt a pulse width modulation way to control the width tp of a pulse voltage, and further control the magnetic field of the coil, the extension and retraction of the magnetostrictive stick, and the opening and closing of the valve mouth, and realize the high speed switch valve type digital control of the fluid.

Description

The high-speed switch valve that the actuator of making of rare earth ultra-magnetostriction material drives

Technical field:

The utility model utilizes the big magnetostriction characteristic of rare earth ultra-magnetostriction material in magnetic field, makes actuator, and drives hydrovalve with this actuator.The utility model is with the novel electromechanical conversion and drive flow or the pressure that is used to control fluid, realizes the digital control of flow, pressure, is a kind of base components.Can be used as highi degree of accuracy valve, fuel injection valve etc.Be applicable to accurate Mechatronic control system, also can be used for the seabed, in the hydraulic system of inferior maintenance inconvenience.

Background technique:

Known ferromagnetic material and ferrimagnetic material are owing to the change of magnetized state, and its length and volume all small variation will take place, and this phenomenon is called magnetostriction.TbFe₂, SmFe₂, DyFe₂, HoFe₂, TbDyFe₂Not only magnetostriction value of rare-earth-iron based compound height such as (terbium iron, samarium iron, dysprosium iron, holmium iron, terbium dysprosium ferrums), and curie temperature is higher than room temperature, and room temperature magnetostriction value is 1000～2500 * 10^-6, be traditional magnetostriction materials such as iron, nickel etc. 10～100 times, this class material is called as rare earth ultra-magnetostriction material (RearEarth Giant magnetostrictive materials is abbreviated as RE-GMM).Though people recognize the using value of this kind material at present, many applications are also fully developed.

High-speed switch valve is a kind of digital control valve, and its valve port high frequency between unlatching and closed two states switches, and opens the ratio of switching frequency or unlatching and closing time by control and controls liquid stream.This working method require to drive spool electricity-machine switching mechanism frequency response height, ouput force is big, displacement accuracy is high.

The utility model utilizes rare earth ultra-magnetostriction material, and fore and aft motion is as the power that drives spool in electromagnetic field, and the control valve port opens and closes, and is a kind of novel high speed switch valve.

Summary of the invention:

The purpose of this utility model is the actuator driving high-speed switch valve with the terbium dysprosium ferrum material, and the control mouth of valve can be switched by high frequency between unlatching and closed two states.Device architecture is simple, and the reliability height is realized new control mode.

Technological scheme of the present invention as shown in Figure 1.The high-speed switch valve that the actuator of making of rare earth ultra-magnetostriction material drives can be divided into three parts, 1) actuator formed by magnetostrictive rod (1), coil (2), actuator housings (3), magnet case (14), coil carrier parts such as (15).2) power transmission and the displacement amplifying mechanism of forming by push rod (10), displacement amplification spring (11), pressing plate (12), power transmission ball (13), contiguous block (4).3) control valve for fluids of forming by valve body (6), butterfly spring (7), valve end cap (8), spool (9).Three parts are connected by the very strong connecting bolt of rigidity (5).

RE-GMM actuator in the utility model is a kind of novel electromechanical conversion equipment.Its working principle is to utilize rare earth ultra-magnetostriction material terbium dysprosium ferrum (TbDyFe₂) big magnetostriction characteristic in magnetic field, obtain output displacement and ouput force, drive load.The RE-GMM actuator can replace force motor, torque motor, stepper motor, actuating motor, piezoelectric constant, the displacement and the power of output highi degree of accuracy, high response, high reliability, and can be directly and the computer link realization digital control.

The high-speed switch valve that the described actuator of making of rare earth ultra-magnetostriction material drives produces magnetic field during coil electricity, magnetostrictive rod elongation in magnetic field.The distortion of magnetostrictive rod is passed to thrust ball by magnet case, makes it displacement.

Thrust ball is placed in the taper hole of pressing plate end, by the conical surface power and displacement is passed to pressing plate.The spring outer rim is amplified in pressing plate outer rim pushing displacement, makes displacement amplify camber of spring; Displacement is amplified the spring inner edge and is obtained the axial displacement greater than pressing plate pressure point place, and displacement is amplified relation according to lever principle.Displacement is amplified spring and is pressed on the push rod left end with inner edge, the displacement of amplifying is passed to push rod, referring to Fig. 2.Push rod backs down spool.

The control valve for fluids spool left end conical surface and valve body are formed the control valve port.Valve port is opened response soon, does not have the dead band, with respect to limited spool travel, can obtain bigger valve opening.Closed is good when closing.Valve port was opened when spool moved to left, and fluid can enter to flow out or enter through valve port from hydraulic fluid port down from hydraulic fluid port down through valve port and flow out from last hydraulic fluid port from last hydraulic fluid port, and high-speed switch valve is in " opening " state at this moment.If coil blackout, magnetostrictive rod is replied life size, and then switch valve is in " pass " state.

The spool right-hand member is pressed with butterfly spring, can impose precompression to magnetostrictive rod by above-mentioned power (displacement) transfer chain.The precompression of butterfly spring can be regulated by the left end bolt.

Actuator of the present utility model, power output and displacement amplifying mechanism, control valve for fluids three parts and valve end cap adopt known interconnection technique to connect, and need the liquid reservoir of sealing to adopt known sealing technique sealing.

Description of drawings:

Fig. 1 structural representation of the present utility model

1,spring 12,pressing plate 13,power transmission ball 14,magnet case 15, coil carrier are amplified in magnetostrictive rod 2, coil 3, actuator housings 4, contiguous block 5, connecting bolt 6, valve body 7, butterfly spring 8, valve end cap 9,spool 10,push rod 11, displacement

Output of Fig. 2 power and displacement amplification principle schematic representation

Fig. 3 flow control schematic diagram

Embodiment:

Use the utility model to can be used for fluid flow control.As shown in Figure 3, the utility model coil obtains the pulsed voltage from the signal power source controller, and the width tp of pulsed voltage can adopt pulse width modulation mode control.The corresponding coil high magnetic fields of high level, bar magnet elongation, valve port are opened.Control pulsewidth degree tp is with regard to the may command valve port opening time, and the liquid of control a period of time flows flow.

The utility model has adopted the actuator of the super magnetostriction material making with high frequency response, big ouput force to drive high-speed switch valve, and the spool quality is little, the loaded spring Young's modulus is big.Therefore open and closing course weak point, control accuracy height.

Claims (3)

1. the high-speed switch valve that drives of the actuator of making of rare earth ultra-magnetostriction material is connected to form by actuator, power transmission and displacement amplifying mechanism, control valve for fluids three partially rigids; Actuator is made up of magnetostrictive rod (1), coil (2), actuator housings (3), magnet case (14), coil carrier (15); Power is transmitted and displacement amplifying mechanism is made up of push rod (10), displacement amplification spring (11), pressing plate (12), power transmission ball (13), contiguous block (4); Control valve for fluids is made up of valve body (6), butterfly spring (7), valve end cap (8), spool (9); Actuator of the present utility model, power output and displacement amplifying mechanism, control valve for fluids three parts and valve end cap adopt known interconnection technique to be rigidly connected.

2. the high-speed switch valve that the actuator of making of rare earth ultra-magnetostriction material according to claim 1 drives, it is characterized in that amplifying power transmission and the displacement amplifying mechanism that spring (11), pressing plate (12), power transmission ball (13), contiguous block (4) are formed by push rod (10), displacement, pressing plate (12) outer rim is pressed in displacement amplifies on spring (11) outer rim, and power transmission and displacement are amplified spring (11) inner edge and be pressed in push rod (10) left end.

3. the high-speed switch valve that the actuator of making of rare earth ultra-magnetostriction material according to claim 1 drives, it is characterized in that, control valve for fluids spool (9) the left end conical surface and valve body (6) are formed the control valve port, spool (9) right-hand member is pressed with butterfly spring (7), and butterfly spring (7) right-hand member is provided with the bolt of the adjusting precompression that connects by known technology.

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