CN112503246A

CN112503246A - Micro-flow plane sealing giant magnetostrictive proportional valve

Info

Publication number: CN112503246A
Application number: CN202011466328.4A
Authority: CN
Inventors: 苗建忠; 潘胜鹏; 龚锐
Original assignee: Guizhou Mangwei Fluid Intelligent Technology Co ltd
Current assignee: Guizhou Mangwei Fluid Intelligent Technology Co ltd
Priority date: 2020-12-14
Filing date: 2020-12-14
Publication date: 2021-03-16

Abstract

The invention provides a micro-flow plane sealing giant magnetostrictive proportional valve which comprises a valve body, a magnetism isolating ring and a pole shoe which are fixedly connected in sequence from left to right, wherein a coil assembly is sleeved on the magnetism isolating ring, a valve seat is arranged in an inner hole of the pole shoe, a valve core is arranged on the left side of the valve seat, the opposite surface of the valve core and the valve seat is a plane sealing surface, a shoulder structure is arranged at the left end of the valve core, a reset part is arranged between the shoulder structure and the wall surface of the valve body, a supporting sleeve and a giant magnetostrictive sleeve are sleeved on the valve core, and the supporting sleeve and the valve core are driven to move by the extension of the. The invention makes the fluid flow rate convenient for proportion adjustment, and the adjustment range is large; the micro opening control of the valve can be realized, and the control precision is high; the output force is large, the sealing performance is good, and the service life is long; the valve has high response speed, good repeatability and high reliability; the displacement of the valve core is controlled by adopting a magnetic field, so that the safety is high.

Description

Micro-flow plane sealing giant magnetostrictive proportional valve

Technical Field

The invention relates to the technical field of valves, in particular to a micro-flow plane sealing giant magnetostrictive proportional valve.

Background

The pressure control and flow control are important links of attitude and orbit control power systems of the aerospace craft, in particular to the field of micro propulsion of micro satellites and deep space probes, such as electric propulsion systems and cold air propulsion systems. During attitude control and orbital transfer control, the required output thrust is milli-Newton or micro-Newton. For this requirement, it is common practice to provide a micro-flow throttle valve behind the solenoid valve, and to limit the flow through the throttle valve, so that the engine can only generate a constant thrust force, and the thrust force cannot be changed as required. Although a current proportion long column type flow valve and a piezoelectric ceramic proportion valve are also developed, the proportion electromagnet is not high in sensitivity and large in hysteresis loop, so that proportion control is difficult to realize, and the maneuverability and the service life of a propulsion system are greatly limited; the piezoelectric ceramic proportional valve has a complex structure and small output force, and is not widely used.

For example, chinese patent publication No. CN106641374A discloses a micro-flow piezoelectric ceramic proportional valve, which includes an upper casing and a lower casing, the upper casing and the lower casing are connected by bolts, a piezoelectric ceramic component is disposed in the lower casing, an inlet connector is disposed at the upper end of the piezoelectric ceramic component, a valve needle is disposed at the lower end of the piezoelectric ceramic component, the piezoelectric ceramic component is a plurality of piezoelectric ceramic pieces mounted in the lower casing by mounting rings, and when the valve is powered on, the piezoelectric ceramic pieces deform to drive the valve needle to move, thereby causing the change of the valve opening. However, the piezoelectric ceramic piece of the proportional valve needs to be installed in the lower shell by using an installation ring, and when the piezoelectric ceramic piece of the proportional valve deforms, the material stretches out and draws back from the upper direction and the lower direction, so that only a part of deformation acts on the valve needle, and the movable range of the valve needle is too small; to increase the adjustment range, the thickness and the number of the piezoelectric ceramic pieces need to be greatly increased, and the volume and the weight of the valve are greatly increased. In addition, the deformation of the piezoelectric ceramic piece is enough to drive the valve needle to conduct the valve, and meanwhile, the valve needle is in a valve closing state when the piezoelectric ceramic piece is not deformed, a certain pressure needs to be accurately controlled during assembly, the deformation and output of the piezoelectric ceramic piece are small, the adaptive capacity to the pressure is poor, and the assembly of the proportional valve is difficult greatly.

Disclosure of Invention

In order to solve the technical problem, the invention provides a micro-flow plane sealing giant magnetostrictive proportional valve.

The invention is realized by the following technical scheme.

The invention provides a micro-flow plane sealing giant magnetostrictive proportional valve which comprises a valve body, a valve core, a magnetism isolating ring and a pole shoe, wherein the valve body, the magnetism isolating ring and the pole shoe are sequentially and fixedly connected from left to right, a coil assembly is sleeved on the magnetism isolating ring, a fluid inlet is formed in the valve body, a valve seat is arranged in an inner hole of the pole shoe, a valve nozzle channel is formed in the valve seat, the valve core is arranged on the left side of the valve seat, one opposite surface of the valve core and the valve seat is a plane sealing surface, a shoulder structure is arranged at the left end of the valve core, a reset part is arranged on the left side of the shoulder structure, one end of the reset part is in contact with the valve body, a support sleeve and a giant magnetostrictive sleeve are sleeved on the valve core, the giant magnetostrictive sleeve is positioned in the magnetism isolating ring, the right side of the giant magnetostrictive sleeve is in contact with the.

The pole shoe is cylindrical with an outward flange, the right end of the coil assembly is in contact with the outward flange of the pole shoe, and the left end of the coil assembly at least covers one part of the valve body.

The coil assembly comprises a coil and a coil sleeve, insulating glue is arranged between the coil sleeve and the coil, a wiring terminal is arranged on the coil sleeve in a penetrating mode, and the wiring terminal is connected with the coil.

The left end of the coil sleeve is of an inward flanging structure and is in contact with the valve body.

A gap is arranged between the valve core and the giant magnetostrictive sleeve, and a fluid channel is arranged on the supporting sleeve to communicate the gap with the fluid inlet.

The left side of the valve seat is provided with an annular distribution groove surrounding the valve nozzle channel, and the annular distribution groove is communicated with the gap.

The pressing part is a disc spring.

The reset component is a spring.

And a sealing ring is arranged between the valve seat and the pole shoe.

The valve seat and the pole shoe can be in threaded connection, interference fit or welded.

And the pole shoe and the magnetism isolating ring and the valve body are welded.

The invention has the beneficial effects that:

compared with the prior art, the invention has the following advantages: (1) the magnetic field intensity is controlled by utilizing the current, so that the telescopic length of the giant magnetostrictive sleeve is controlled, the fluid flow is convenient to adjust in proportion, and the adjusting range is large compared with the original micro flow adjusting valve; (2) the micro opening control of the valve can be realized, the control precision is high, and the proportional characteristic cannot be attenuated along with the use; (3) because the output force of the giant magnetostrictive material is large, the valve core and the valve seat can be sealed by adopting a metal plane, the manufacturing difficulty is reduced, the sealing performance is good, and the service life is long; (4) due to the movement rigidity and the dynamic stability of the giant magnetostrictive material, the valve has good response repeatability and high reliability; (5) the displacement of the valve core is controlled by adopting a magnetic field, so that the safety is high.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic view of the valve conducting state of the present invention.

In the figure: 1-a valve body; 2-a reset component; 3-a pressing part; 4-a valve core; 5-supporting the sleeve; 6-giant magnetostrictive sleeve; 7-magnetism isolating ring; 8-a coil assembly; 9-pole shoe; 10-a sealing ring; 11-a valve seat; 12-a coil; 13-a coil housing; 14-insulating glue; 15-a terminal post; 16-a fluid channel; 17-valve mouth passage; 18-shoulder construction; 19-annular distribution groove.

Detailed Description

The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.

Fig. 1 shows a schematic structural diagram of the present invention:

the invention provides a micro-flow plane sealing giant magnetostrictive proportional valve, which comprises a valve body 1, a valve core 4, a magnetism isolating ring 7 and a pole shoe 9, wherein the valve body 1, the magnetism isolating ring 7 and the pole shoe 9 are sequentially and fixedly connected from left to right, a coil assembly 8 is sleeved on the magnetism isolating ring 7, a fluid inlet is arranged on the valve body 1, a valve seat 11 is arranged in an inner hole of the pole shoe 9, a valve nozzle channel 17 is arranged on the valve seat 11, the valve core 4 is arranged on the left side of the valve seat 11, one surface of the valve core 4, which is opposite to the valve seat 11, is a plane sealing surface, a shoulder structure 18 is arranged at the left end of the valve core 4, a resetting part 2 is arranged at the left side of the shoulder structure 18, one end of the resetting part 2 is contacted with the valve body 1, a support sleeve 5 and a giant magnetostrictive sleeve 6 are sleeved on the valve core 4, the giant magnetostrictive sleeve 6 is positioned in the magnetism isolating ring 7, the left side of the supporting sleeve 5 is provided with a pressing part 3, and one end of the pressing part 3 is contacted with the valve body 1.

When the coil assembly 8 is electrified, a magnetic field is generated, the giant magnetostrictive sleeve extends under the action of the magnetic field, so that the supporting sleeve 5 drives the valve core 4 to move leftwards, the planar sealing surfaces of the valve core 4 and the valve seat 11 which face each other are separated, and the valve is opened at the moment, as shown in fig. 2; when the power is off, the magnetic field of the coil 12 disappears, the valve core 4 moves to the right under the action of the reset component 2, so that the planar sealing surfaces of the valve core 4 and the valve seat 11 which face each other are attached, and the valve is closed at the moment, as shown in fig. 1; the pressing part 3 presses the support sleeve 5 tightly to form pre-pressure on the giant magnetostrictive sleeve and keep the deformation performance of the giant magnetostrictive sleeve. Because the giant magnetostrictive material has infinite displacement resolution, the micro opening control of the valve can be realized by applying current, and the control precision is higher.

Compared with the prior art, the invention has the following advantages: the magnetic field intensity is controlled by utilizing the current, so that the telescopic length of the giant magnetostrictive sleeve is controlled, the fluid flow is convenient to adjust in proportion, and the adjusting range is large; the micro opening control of the valve can be realized, the control precision is high, and the proportional characteristic cannot be attenuated along with the use; because the output force of the giant magnetostrictive material is large, the valve core 4 and the valve seat 11 can be sealed by metal planes, the manufacturing difficulty is reduced, the sealing performance is good, and the service life is long; due to the movement rigidity and the dynamic stability of the giant magnetostrictive material, the valve has good response repeatability and high reliability; the displacement of the valve core 4 is controlled by adopting a magnetic field, so that the safety is high.

The pole shoe 9 is cylindrical with an outward flange, the right end of the coil component 8 is in contact with the outward flange of the pole shoe 9, and the left end of the coil component 8 at least covers one part of the valve body 1. The magnetic field forms a circle of closed loop through the pole shoe 9, the valve seat 11, the giant magnetostrictive sleeve 6, the valve body 1 and the coil assembly 8, and the utilization rate of the magnetic field is improved.

The coil assembly 8 comprises a coil 12 and a coil sleeve 13, an insulating glue 14 is arranged between the coil sleeve 13 and the coil 12, a binding post 15 is arranged on the coil sleeve 13 in a penetrating mode, and the binding post 15 is connected with the coil 12. The terminals 15 facilitate connection of the coil 12 to external control circuitry.

The left end of the coil sleeve 13 is of an inward flanging structure and is in contact with the valve body 1. Two ends of the coil 12 are respectively conducted with magnetism through the valve body 1 and the pole shoe 9 to form a closed magnetic circuit, which is convenient for concentrating a magnetic field, keeping the linear relation between the magnetic field and current and being convenient for controlling the linear law of the magnetic field.

A gap is formed between the valve core 4 and the giant magnetostrictive sleeve 6, and a fluid channel 16 is arranged on the supporting sleeve to communicate the gap with a fluid inlet. The fluid flows in the channel in a centralized way, the resistance is reduced, the fluid is uniformly distributed around the gap, and the fluid flows out uniformly when the valve is opened.

The left side of the valve seat 11 is provided with an annular distribution groove 19 surrounding the valve nozzle passage 17, and the annular distribution groove 19 is communicated with the gap. The uniform distribution of fluid pressure is facilitated, and the accuracy of valve control is improved.

The pressing part 3 is a disc spring. The pre-pressure is applied to the giant magnetostrictive material by the disc spring, the disc spring as a pre-pressure device occupies small space, has high frequency response and high rigidity, and is beneficial to reducing the volume of the proportional valve.

The reset component 2 is a spring. The spring has high frequency response and high response speed, and is favorable for quick reset of the valve core 4.

And a sealing ring 10 is arranged between the valve seat 11 and the pole shoe 9. The sealing performance under high pressure is improved, and fluid leakage is prevented.

The valve seat 11 and the pole shoe 9 can be in threaded connection, interference fit or welded connection.

The pole shoe 9 and the magnetism isolating ring 7, and the magnetism isolating ring 7 and the valve body 1 are welded. The integrity of the proportional valve is improved, the strength of the connecting part is ensured, and the use safety is ensured under the condition of high fluid pressure.

The valve body 1, the support sleeve 5, the coil sleeve 13, the pole shoe 9 and the valve seat 11 are made of magnetic materials; the magnetism isolating ring 7 and the valve core 4 are made of non-magnetic materials.

Claims

1. The utility model provides a little flow plane seal giant magnetostrictive valve which characterized in that: the electromagnetic valve comprises a valve body (1), a valve core (4), a magnetism isolating ring (7) and a pole shoe (9), wherein the valve body (1), the magnetism isolating ring (7) and the pole shoe (9) are sequentially and fixedly connected from left to right, a coil (12) assembly (8) is sleeved on the magnetism isolating ring (7), a fluid inlet is formed in the valve body (1), a valve seat (11) is arranged in an inner hole of the pole shoe (9), a valve nozzle channel (17) is formed in the valve seat (11), the valve core (4) is arranged on the left side of the valve seat (11), one opposite side of the valve core (4) and the valve seat (11) is a plane sealing surface, a shoulder structure (18) is arranged at the left end of the valve core (4), a reset part (2) is arranged on the left side of the shoulder structure (18), one end of the reset part (2) is in contact with the valve body (1), a support sleeve (5) and a giant magnetostrictive sleeve (6) are, the right side of the giant magnetostrictive sleeve (6) is in contact with the valve seat (11), the left side of the support sleeve (5) is in contact with the shoulder structure (18), the left side of the support sleeve (5) is provided with the pressing part (3), and one end of the pressing part (3) is in contact with the valve body (1).

2. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: the pole shoe (9) is cylindrical with an outward flange, the right end of the coil (12) assembly (8) is in contact with the outward flange of the pole shoe (9), and the left end of the coil (12) assembly (8) at least covers one part of the valve body (1).

3. The micro-fluidic planar seal giant magnetostrictive proportional valve of claim 2, wherein: coil (12) subassembly (8) are equipped with insulating cement (14) including coil (12), coil cover (13) between coil cover (13) and coil (12), are equipped with terminal (15) on coil cover (13) with running through, and terminal (15) are connected with coil (12).

4. The micro-fluidic planar seal giant magnetostrictive proportional valve of claim 3, wherein: the left end of the coil sleeve (13) is of an inward flanging structure and is in contact with the valve body (1).

5. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: a gap is formed between the valve core (4) and the giant magnetostrictive sleeve (6), and a fluid channel (16) is arranged on the supporting sleeve to communicate the gap with the fluid inlet.

6. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: the left side of the valve seat (11) is provided with an annular distribution groove (19) surrounding the valve nozzle channel (17), and the annular distribution groove (19) is communicated with the gap.

7. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: the pressing part (3) is a disc spring.

8. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: and a sealing ring (10) is arranged between the valve seat (11) and the pole shoe (9).

9. The micro-fluidic planar seal giant magnetostrictive proportional valve of claim 8, wherein: the valve seat (11) and the pole shoe (9) are in threaded connection, interference fit or welded.

10. The micro-fluidic planar sealed giant magnetostrictive proportional valve of claim 1, wherein: the pole shoe (9) and the magnetism isolating ring (7) and the valve body (1) are welded.