CN112682395B

CN112682395B - Self-excitation pulsating airflow generating device and airflow generating method thereof

Info

Publication number: CN112682395B
Application number: CN202011292742.8A
Authority: CN
Inventors: 许明; 孙启民; 陈国金
Original assignee: Hangzhou Dianzi University
Current assignee: Hangzhou Dianzi University
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2022-03-15
Anticipated expiration: 2040-11-18
Also published as: CN112682395A

Abstract

The invention discloses a self-excitation pulsating airflow generating device and an airflow generating method thereof. The invention comprises n self-excitation permanent magnet valve units. The self-excitation permanent magnet valve unit comprises a self-excitation valve shell, an air blocking permanent magnet, a first fixed permanent magnet, a second fixed permanent magnet, a sliding permanent magnet, a self-excitation bias pipe and an air pressure expansion pipe. The second fixed permanent magnet, the air blocking permanent magnet, the first fixed permanent magnet and the sliding permanent magnet are sequentially arranged in the self-excitation valve casing and are sequentially attracted to each other. The end part closed pipe passes through the space between the second fixed permanent magnet and the air blocking permanent magnet; the self-excitation offset pipe penetrates between the air blocking permanent magnet and the first fixed permanent magnet. Self-excitation air leakage ports are formed in the side faces, close to the air-blocking permanent magnet, of the self-excitation bias pipe and the end part closed pipe. In the invention, the output airflow of the previous self-excitation permanent magnet valve unit is used for triggering the charging and discharging of the subsequent self-excitation permanent magnet valve unit, so that the periodical charging and discharging of a plurality of self-excitation air outlets can be realized under the condition of only inputting stable airflow.

Description

Self-excitation pulsating airflow generating device and airflow generating method thereof

Technical Field

The invention belongs to the technical field of pulsating gas sources, and particularly relates to a self-excitation pulsating gas flow generating device and a gas flow generating method thereof.

Background

The self-excitation valve in the prior art mainly depends on the self-excitation of a circuit system to generate signals to control a valve actuating mechanism so as to realize the periodic on-off of the valve. The valve of this type can be regarded as being composed of two main parts, namely a circuit system and a valve execution structure, and a signal source output by the circuit system is used as an excitation control valve execution mechanism. Therefore, at the present stage, the self-excitation valve needs to be provided with a circuit system, and regular on-off can not be realized by the internal mechanical structure of the valve. Furthermore, the current state of the art self-energizing valve circuitry is not suitable for use in deep water areas where high water resistance is required. Since the waterproof property increases the complexity of the system, the flexible operation of the underwater actuator is not utilized.

Disclosure of Invention

The invention aims to provide a self-excitation pulsating airflow generation device and an airflow generation method thereof.

The invention relates to a self-excitation pulsating airflow generating device which comprises n self-excitation permanent magnet valve units, wherein n is more than or equal to 2. The self-excitation permanent magnet valve unit comprises a self-excitation valve casing, an air blocking permanent magnet, a first fixed permanent magnet, a second fixed permanent magnet, a sliding permanent magnet, a self-excitation bias pipe and an air pressure expansion pipe. The second fixed permanent magnet, the air blocking permanent magnet, the first fixed permanent magnet and the sliding permanent magnet are sequentially arranged in the self-excitation valve casing and are sequentially attracted to each other. The second fixed permanent magnet is fixed with the self-energizing valve housing. The air-blocking permanent magnet is connected with the self-excitation valve shell in a sliding manner. The first fixed permanent magnet is fixed with the self-energizing valve housing. The sliding permanent magnet is in sliding connection with the self-excitation valve shell; an air pressure expansion pipe is arranged between the first fixed permanent magnet and the sliding permanent magnet.

One end of the end closed pipe and one end of the self-excitation bias pipe are connected together to serve as an air inlet of the self-excitation permanent magnet valve unit. The end part closed pipe passes through the space between the second fixed permanent magnet and the air blocking permanent magnet; the self-excitation offset pipe penetrates between the air blocking permanent magnet and the first fixed permanent magnet. Self-excitation air leakage ports are formed in the side faces, close to the air-blocking permanent magnet, of the self-excitation bias pipe and the end part closed pipe. The other end of the end closed pipe is closed; the other end of the self-excitation deflection pipe is communicated with one end of the first output pipe and one end of the second output pipe. The n self-excitation permanent magnet valve units are sequentially connected end to end through a second output pipe and an air pressure expansion pipe to form a closed loop. And the first output pipes of the n self-excitation permanent magnet valve units are used as n air outlets of the self-excitation driving module.

Preferably, both the self-exciting bias tube and the closed end tube are inflatable. And a self-excitation restriction opening is formed in the outer side of the self-excitation valve shell. The self-excitation bias pipe and the closed-end pipe both pass through the self-excitation restriction port.

Preferably, the sectional area of the self-excitation air leakage port on the end closed pipe of one of the self-excitation permanent magnet valve units is larger than the sectional areas of the self-excitation air leakage ports on the end closed pipes of the other n self-excitation driving modules.

Preferably, the outer side surface of the sliding permanent magnet in one of the self-excitation permanent magnet valve units is fixed with the connecting rod. The connecting rod extends out of the self-excitation bracket of the self-excitation driving module;

preferably, a starting electromagnet is arranged at the outer side of the second fixed permanent magnet in one of the self-excitation permanent magnet valve units at intervals; the starting electromagnet is fixed on the self-excitation bracket. When the electromagnet is started to be electrified, the sliding permanent magnet is attracted and moves to a state of abutting against the self-excitation bias tube.

Preferably, a check valve with an inward output port is connected to the air pressure expansion pipe in one of the self-excitation permanent magnet valve units; when the starting device is started, the input port of the one-way valve is connected with the output port of a starting air source; the gas flow output by the starting gas source is larger than the flow input by the driving gas source from the exciting offset pipe.

Preferably, the self-excited pulsating gas flow generating device of the present invention further comprises a self-excited outer frame and a magnetic shield foil plate. The magnetic shielding foil plate is fixed on the self-excitation outer frame, and the self-excitation outer frame is internally divided into n mounting cavities. The n self-excitation permanent magnet valve units are respectively arranged in the n installation cavities.

Preferably, one or more air outlets of the self-excitation driving module are connected with electromagnetic control valves. The electromagnetic control valve comprises a control valve self-excitation bracket, a suction closing block, a first electromagnet, a second electromagnet and a control deflection pipe. The attracted closed block is made of ferromagnetic material or permanent magnet. The first electromagnet and the second electromagnet are respectively fixed on two sides of the control valve self-excitation support. The suction closing block is connected in the control valve self-excitation bracket in a sliding manner; the number of the control deflection pipes is two. One of the control deflection pipes passes through the space between the first electromagnet and the attracted sealing block; and the other control deflection pipe passes through the space between the second electromagnet and the attracted sealing block. One side of the two control deflection pipes close to the sucked sealing block is provided with a control valve air leakage opening. One ends of the two control partial pipes are connected together and used as air inlets of the electromagnetic control valves, and the other ends of the two control partial pipes are respectively two air outlets of the electromagnetic control valves. The inner ends of the two control partial pipes are connected together and used as air inlets of the electromagnetic control valve. The outer ends of the two control eccentric pipes are respectively two air outlets of an electromagnetic control valve.

Preferably, the sucked closing block is connected with the inner side wall of the control valve self-excitation bracket through a spring; the control bias pipe is inflated to expand. And a control valve restraint port is formed in the outer side of the control valve self-excitation support. The two control eccentric pipes pass through the control valve restriction ports.

The airflow generation method of the self-excitation pulsating airflow generation device comprises the following specific steps:

step one, inputting stable airflow to n air inlets of a self-excitation driving module. The n self-excitation permanent magnet valve units are all in an initial state that the gas blocking permanent magnets abut against the end part closed pipe to seal the self-excitation gas leakage openings on the end part closed pipe, so that gas input into the end part closed pipe cannot be leaked. As gas is input, the gas pressure in the closed end pipe rises and begins to expand in the radial direction, and the expanded closed end pipe is pressed in the self-excitation restriction opening to be stopped at the self-excitation restriction opening. The thrust that the gas blocking permanent magnet received the atmospheric pressure in the tip closed tube and brought through self-excitation gas leakage mouth, and this thrust keeps getting bigger along with gaseous continuous output tip closed tube.

And step two, the air blocking permanent magnet in one of the self-excitation permanent magnet valve units is firstly pushed to the second fixed permanent magnet. The self-excitation air leakage of the end closed pipe is leaked, and the pressure of the end closed pipe is released; the self-excitation air leakage port of the self-excitation offset pipe is blocked by the air blocking permanent magnet, the self-excitation offset pipe inputs air, the internal air pressure rises and begins to expand along the radial direction, the expanded self-excitation offset pipe extrudes in the self-excitation constraint port, and the end part of the self-excitation offset pipe is closed. Gas is output from the first output pipe and the second output pipe; the gas output by the second output pipe enters a gas pressure expansion pipe of the following self-excitation permanent magnet valve unit; the gas output by the first output pipe enters an electromagnetic control valve or a corresponding driving elastic unit.

Thirdly, after the gas output by the second output pipe of the previous self-excitation permanent magnet valve unit enters the gas pressure expansion pipe in the next self-excitation permanent magnet valve unit, the gas pressure expansion pipe in the next self-excitation permanent magnet valve unit expands to push away the sliding permanent magnet, so that the attractive force of the first fixed permanent magnet and the sliding permanent magnet on the gas blocking permanent magnet in the next self-excitation permanent magnet valve unit is reduced, the gas blocking permanent magnet in the next self-excitation permanent magnet valve unit slides to the self-excitation offset pipe, the self-excitation gas leakage port of the self-excitation offset pipe of the next self-excitation permanent magnet valve unit is blocked, and the first output pipe and the second output pipe of the next self-excitation permanent magnet valve unit output gas; meanwhile, the air blocking permanent magnet in the previous self-excitation permanent magnet valve unit is pushed by the air pressure of the self-excitation air leakage port of the corresponding self-excitation offset pipe to slide to the position of the self-excitation air leakage port of the closed pipe at the end part, so that the self-excitation offset pipe in the previous self-excitation permanent magnet valve unit releases pressure, and the pressure of the air pressure expansion pipe in the next self-excitation permanent magnet valve unit is released to restore the original state; at this time, the latter sliding permanent magnet of the self-energizing permanent magnet valve unit is reset by the attraction force of the first stationary permanent magnet. And the self-excitation driving module realizes the sequential and alternate pressurization and pressure release of the n air outlets of the self-excitation driving module under the condition of stable air pressure flow input.

The invention has the beneficial effects that:

1. the self-excitation permanent magnet valve units of the self-excitation driving module control the charging and releasing of the four self-excitation air outlets by the action of magnetic attraction force between the permanent magnets in the self-excitation driving module and the change of gas pressure. Because the output airflow of the former self-excitation permanent magnet valve unit is used as an air pressure signal to trigger the charging and pressure releasing of the latter self-excitation permanent magnet valve unit, the periodic charging and pressure releasing of a plurality of self-excitation air outlets can be realized under the condition of only inputting stable airflow without any external excitation signal.

2. The invention realizes that one pipeline is cut off when the other pipeline is pressurized by utilizing the expansion of the self-excitation offset pipe and the air pressure expansion pipe at the restriction port when the pipelines are pressurized, thereby avoiding the leakage of gas and enhancing the load capacity of the pulsating output airflow.

3. The invention can utilize any stable fluid source in the natural environment to generate impulse response by excitation, thereby realizing the output of pulsating airflow without a control module and power elements.

Drawings

FIG. 1 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 2 is a schematic diagram of the gas circuit connection according to embodiment 1 of the present invention;

FIG. 3 is a schematic diagram showing the internal structure of a self-excited permanent magnet valve unit according to embodiment 1 of the present invention

Fig. 4 is a schematic view of a self-energizing permanent magnet valve unit at the start of gas charging in embodiment 1 of the present invention;

FIG. 5 is a schematic view of the self-energizing permanent magnet valve unit after the pneumatic expansion tube is expanded in embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of the self-excitation process in embodiment 1 of the present invention;

FIG. 7 is a schematic view of the gas circuit connection according to embodiment 2 of the present invention;

fig. 8 is a schematic view of the internal structure of an electromagnetic control valve in embodiment 2 of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1 and 4, a self-excited pulsating gas flow generating device includes a driving gas source 1, a hose 5, a self-excited outer frame 2, a magnetic shield foil 3, and a self-excited permanent magnet valve unit 4. The annealed magnetic shielding foil plate 3 is cross-shaped, and divides the interior of the self-excitation outer frame 2 into four installation cavities. Four self-excitation permanent magnet valve units 4 are respectively installed in the four installation cavities. The magnetic shielding foil plate 3 can shield magnetic force after being annealed, and under the action of the magnetic shielding foil plate, the four self-excitation permanent magnet valve units 4 do not interfere with each other.

The self-excitation permanent magnet valve unit 4 comprises a self-excitation valve shell, an air blocking permanent magnet 4-11, a first fixed permanent magnet 4-10, a second fixed permanent magnet 4-3, a sliding permanent magnet 4-9, a self-excitation offset pipe 4-1, an air pressure expansion pipe 4-7 and a self-excitation restriction port 4-14. The self-energizing valve housing includes a primary frame 4-2 and a secondary frame 4-8. The main frame 4-2 and the auxiliary frame 4-8 are fixed together side by side. The second fixed permanent magnet 4-3, the air-blocking permanent magnet 4-11, the first fixed permanent magnet 4-10 and the sliding permanent magnet 4-9 are sequentially arranged in the self-excitation valve casing (from right to left in the figure 4) and are sequentially attracted to each other (namely, the magnetic poles are the same in direction, the opposite ends of the second fixed permanent magnet 4-3 and the air-blocking permanent magnet 4-11 are opposite in polarity, the opposite ends of the air-blocking permanent magnet 4-11 and the first fixed permanent magnet 4-10 are opposite in polarity, and the opposite ends of the first fixed permanent magnet 4-10 and the sliding permanent magnet 4-9 are opposite in polarity).

The second fixed permanent magnet 4-3 is fixed with the main frame 4-2. The air-blocking permanent magnet 4-11 is connected with the inner cavity of the main frame 4-2 in a sliding way, and the sliding direction is parallel to the arrangement direction of the four permanent magnets. The first fixed permanent magnet 4-10 is fixed with the subframe 4-8. The sliding permanent magnets 4-9 are connected with the inner cavity of the subframe 4-8 in a sliding manner, and the sliding direction is parallel to the arrangement direction of the four permanent magnets. A plurality of first balls 4-13 are arranged between the air blocking permanent magnet 4-11 and the inner cavity of the main frame 4-2 to reduce the friction force; a plurality of second balls 4-15 are arranged between the sliding permanent magnets 4-9 and the inner cavity of the subframe 4-8 to reduce the friction force; an air pressure expansion pipe 4-7 is arranged between the first fixed permanent magnet 4-10 and the sliding permanent magnet 4-9. When the air pressure expansion pipe 4-7 is inflated by air, the sliding permanent magnet 4-9 is pushed to be far away from the first fixed permanent magnet 4-10.

The outer side of the main frame 4-2 is provided with a self-excitation restriction opening 4-14. The self-excitation bias tube 4-1 and the closed-end tube 4-4 both pass through the self-excitation restriction port 4-14. The self-excitation inclined tube 4-1 and the end part closed tube 4-4 both adopt expansion air tubes, and when the internal air pressure is increased, the expansion air tubes expand along the radial direction; if the air pressure in the end closed pipe 4-4 is increased to be larger than the air pressure in the self-excitation inclined pipe 4-1, the end closed pipe 4-4 is expanded, the self-excitation inclined pipe 4-1 is extruded in the self-excitation restriction opening 4-14, and the self-excitation inclined pipe 4-1 is cut off under extrusion and cannot be ventilated. On the contrary, if the pressure in the self-excited inclined tube 4-1 is increased to be larger than that in the closed end tube 4-4, the self-excited inclined tube 4-1 is expanded, so that the closed end tube 4-4 is cut off under extrusion.

The closed end pipe 4-4 and the inner end (i.e. air inlet end) of the self-excitation bias pipe 4-1 are connected together to serve as an air inlet of the self-excitation permanent magnet valve unit 4 and are connected to the driving air source 1 through a hose 5. The outer ends of the end closed pipe 4-4 and the self-excitation offset pipe 4-1 extend into the main frame 4-2. The end part closed pipe 4-4 penetrates between the second fixed permanent magnet 4-3 and the air blocking permanent magnet 4-11; the self-excitation bias pipe 4-1 passes through the air-blocking permanent magnet 4-11 and the first fixed permanent magnet 4-10. The self-excitation inclined tube 4-1 and the end part closed tube 4-4 are provided with self-excitation air leakage openings 4-12 close to the side surface of the air blocking permanent magnet 4-11.

When the air blocking permanent magnet 4-11 props against the self-excitation air leakage port 4-12 of the end closed pipe 4-4, the end closed pipe 4-4 can be enabled to be air-tight; the air blocking permanent magnet 4-11 can make the self-excitation offset pipe 4-1 not leak air when abutting against the self-excitation air leakage port 4-12 of the self-excitation offset pipe 4-1. In an initial state, the air-blocking permanent magnet 4-11 is pressed against the self-excitation air leakage port 4-12 of the end closed pipe 4-4 under the adsorption of the first fixed permanent magnet 4-10 and the sliding permanent magnet 4-9. The outer end part of the end part closed pipe 4-4 is closed; the end opening of the outer end of the self-excitation offset pipe 4-1 is communicated with one end of a first output pipe 4-5 and one end of a second output pipe 4-6.

As shown in fig. 4, the four self-excitation permanent magnet valve units 4 are sequentially connected end to end through the second output pipes 4-6 and the air pressure expansion pipes 4-7 to form a closed loop (i.e., the last self-excitation permanent magnet valve unit 4 is connected with the first self-excitation permanent magnet valve unit 4); the second output pipe 4-6 in the former self-excitation permanent magnet valve unit 4 is connected to the air pressure expansion pipe 4-7 in the latter self-excitation permanent magnet valve unit 4 to form a closed loop. Therefore, when the second output pipe 4-6 in the former self-excitation permanent magnet valve unit 4 outputs airflow, the air pressure expansion pipe 4-7 in the latter self-excitation permanent magnet valve unit 4 expands the air to push the sliding permanent magnet 4-9 away.

The first output pipes 4-5 of the four self-excitation permanent magnet valve units 4 are used as four self-excitation air outlets of the self-excitation driving module. The sectional area of the self-excitation air leakage port 4-12 on the end closed pipe 4-4 of one self-excitation permanent magnet valve unit 4 is larger than the sectional areas of the self-excitation air leakage ports 4-12 on the end closed pipes 4-4 of the other three self-excitation driving modules. So that the air-lock permanent magnet 4-11 in the self-excitation driving module with the cross section area of the end closed pipe 4-4 self-excitation air leakage port 4-12 can be pushed out first under the condition of the same air pressure.

The four self-excitation permanent magnet valve units 4 work in cooperation as follows:

as shown in fig. 6, a constant air pressure flow is input to the self-excitation bias pipe 4-1 and the closed end pipe 4-4 in the four self-excitation permanent magnet valve units 4; in the initial state, the air blocking permanent magnets 4-11 in the respective excitation drive modules are subjected to the attraction resultant force Fa from the first fixed permanent magnets 4-10 and the sliding permanent magnets 4-9 and also subjected to the resultant force Fb from the air pressure at the self-excitation air leakage ports 4-12 of the end closed pipes 4-4 and the attraction force of the second fixed permanent magnets 4-3 d; force Fa is in the opposite direction of force Fb, and Fa > Fb. At this time, the air-lock permanent magnet 4-11 abuts against the first stationary permanent magnet 4-10.

As shown in fig. 7, the air blocking permanent magnet 4-11 in the self-excited driving module having the largest self-excited air leakage port 4-12 in the closed end pipe 4-4 is pushed toward the self-excited bias pipe 4-1 to abut against the self-excited air leakage port 4-12 of the self-excited bias pipe 4-1. The gas flow fed into the exciting offset pipe 4-1 no longer leaks from the exciting gas leak port 4-12, but is fed out to the first outlet pipe 4-5 and the second outlet pipe 4-6. The second output pipe 4-6 outputs the gas to the air pressure expansion pipe 4-7 in the latter self-excitation permanent magnet valve unit 4, so that the air pressure expansion pipe 4-7 in the latter self-excitation permanent magnet valve unit 4 expands to push away the sliding permanent magnet 4-9, and further the attraction resultant force Fa of the first fixed permanent magnet 4-10 and the sliding permanent magnet 4-9 on the air blocking permanent magnet 4-11 in the latter self-excitation permanent magnet valve unit 4 is reduced, and Fa is less than Fb; the gas blocking permanent magnet 4-11 in the latter self-excitation permanent magnet valve unit 4 slides to abut against the self-excitation gas leakage port 4-12 corresponding to the self-excitation eccentric pipe 4-1, and gas is output to the first output pipe 4-5 and the second output pipe 4-6 of the latter self-excitation permanent magnet valve unit 4; meanwhile, the gas blocking permanent magnet 4-11 in the previous self-excitation permanent magnet valve unit 4 is pushed by the gas pressure of the self-excitation gas leakage port 4-12 of the corresponding self-excitation offset pipe 4-1 to be restored to the self-excitation gas leakage port 4-12 abutting against the end closed pipe 4-4, and the gas in the gas pressure expansion pipe 4-7 in the later self-excitation permanent magnet valve unit 4 leaks out and restores to the original state, so that the sliding permanent magnet 4-9 in the later self-excitation permanent magnet valve unit 4 is also restored. The self-excitation driving module realizes that the four self-excitation air outlets (four first output pipes 4-5) output air in turn and alternately under the condition of stable air pressure flow input, thereby realizing self-excitation output. The four self-excitation air outlets of the self-excitation driving module periodically output pressurized pressure-relief airflow under the control action of the four self-excitation air outlets, so that a stable traveling wave airflow source with a certain phase difference can be output.

The four self-excitation air outlets of the self-excitation driving module are respectively connected with the four pneumatic elements 6, so that the four pneumatic elements 6 are periodically pressurized and depressurized. In this embodiment, the pneumatic element 6 is a cylinder with a spring return function; under the action of the invention, the alternating pushing-out and retracting of the four cylinders can be realized only under the input of the stable airflow source. The present invention is also applicable to crawl driving of a multi-legged robot.

Example 2

This example differs from example 1 in that: the self-energizing drive module is activated in different ways. The cross sections of self-excitation air leakage ports 4-12 on the closed tubes 4-4 at the inner ends of the four self-excitation driving modules are the same; the outer side surface (the side far away from the first fixed permanent magnet 4-10) of the sliding permanent magnet 4-9 in one of the self-excitation permanent magnet valve units 4 is fixed with a connecting rod. The connecting rod extends out of the self-excitation bracket of the self-excitation driving module;

when the self-excitation driving module is started (the driving air source 1 starts to supply air), the sliding permanent magnet 4-9 in one of the self-excitation permanent magnet valve units 4 is pulled to one side far away from the first fixed permanent magnet 4-10 by a connecting rod manually, and then the air blocking permanent magnet 4-11 in the self-excitation permanent magnet valve unit 4 starts to act, so that the self-excitation driving module is started.

Example 3

This example differs from example 2 in that: the self-energizing drive module is activated in different ways. No connecting rod is arranged; a starting electromagnet is arranged at the outer side of a second fixed permanent magnet in one self-excitation permanent magnet valve unit 4 at intervals; the starting electromagnet is fixed on the self-excitation bracket. When the starting electromagnet is electrified, the sliding permanent magnet 4-9 is attracted and moves to one side far away from the first fixed permanent magnet 4-10.

When the self-excitation driving module is started, the starting electromagnet is electrified to drive the first fixed permanent magnet 4-10 to move, and the starting of the self-excitation driving module is realized. Then, the start electromagnet is powered off.

Example 4

This example differs from example 1 in that: the self-energizing drive module is activated in different ways. The cross sections of self-excitation air leakage ports 4-12 on the closed tubes 4-4 at the inner ends of the four self-excitation driving modules are the same; the end part of the air pressure expansion pipe 4-7 in one of the self-excitation permanent magnet valve units 4 is provided with a one-way valve with an inward output port;

when the starting device is started, the input port of the one-way valve is connected with the output port of a starting air source; the gas flow output by the starting gas source is larger than the flow input by the driving gas source 1 into the self-excitation offset pipe 4-1, so that the expansion of the gas pressure expansion pipe 4-7 can be realized under the condition that the self-excitation offset pipe 4-1 is not blocked, the corresponding sliding permanent magnet 4-9 is pushed away, the sliding permanent magnet 4-9 pushes away the self-excitation permanent magnet valve unit 4 to start acting, and the starting of the self-excitation driving module is realized.

Example 5

As shown in fig. 7 and 8, the present embodiment is different from embodiment 1 in that: the self-excitation air outlets of the respective excitation permanent magnet valve units 4 are connected with an electromagnetic control valve 7.

The electromagnetic control valve 7 comprises a control valve self-excitation support 7-2, a suction closing block 7-10, a first electromagnet 7-3, a second electromagnet 7-7, a spring 7-9, a first circuit switch 7-4, a second circuit switch 7-6, a battery 7-5, a control bias pipe 7-1 and a control valve restriction opening 7-13. The attracted closed blocks 7-10 are made of ferromagnetic materials or permanent magnets. The first electromagnet 7-3 and the second electromagnet 7-7 are respectively fixed on two sides of the control valve self-excitation support 7-2. A battery 7-5 for supplying power to the first electromagnet 7-3 and the second electromagnet 7-7, a first circuit switch 7-4 for controlling the first electromagnet 7-3 and a second circuit switch 7-6 for controlling the second electromagnet 7-7 are all arranged on the control valve self-excitation bracket 7-2;

the sucked sealing block 7-10 is connected in the control valve self-excitation bracket 7-2 in a sliding manner; a plurality of third balls 7-11 are arranged between the suction closing block 7-10 and the control valve self-excitation bracket 7-2. The sucked sealing block 7-10 is connected with the inner side wall of the control valve self-excitation bracket 7-2 through a spring 7-9; the spring 7-9 enables the attracted sealing block 7-10 to be in the middle position of the first electromagnet 7-3 and the second electromagnet 7-7 in the initial state. The outer side of the control valve self-excitation bracket 7-2 is provided with a control valve restriction port 7-13. The number of the control eccentric pipes 7-1 is two. The two control eccentric pipes 7-1 pass through the control valve restriction ports 7-13. The control eccentric pipe 7-1 adopts an expansion air pipe, and the expansion air pipe expands along the radial direction when the internal air pressure is increased; when the air pressure in one control eccentric pipe 7-1 rises and rises, the other control eccentric pipe 7-1 can be extruded to be cut off.

The two control eccentric pipes 7-1 penetrate through the control valve self-excitation support 7-2 and extend out; one control deflection pipe 7-1 penetrates between the first electromagnet 7-3 and the attracted sealing block 7-10; the other control deflection pipe 7-1 penetrates between the second electromagnet 7-7 and the attracted sealing block 7-10. One side of the two control deflection pipes 7-1 close to the sucked sealing blocks 7-10 is provided with a control valve air leakage opening 7-8. The outer ends of the two control eccentric pipes 7-1 are respectively two output ports of an electromagnetic control valve. And under the condition that the air leakage ports 7-8 of the control valves of the two control offset pipes 7-1 are not blocked by the suction sealing blocks 7-10, the air input into the two control offset pipes 7-1 flows away from the air leakage ports 7-8 of the control valves. When the control valve air leakage opening 7-8 of one control offset pipe 7-1 is blocked by the suction closing block 7-10, the control offset pipe 7-1 outputs air flow. Therefore, the output air flow of any one output port in the electromagnetic control valve can be controlled by controlling the power on and off of the first electromagnet 7-3 or the second electromagnet 7-7. The inner ends of the two control eccentric pipes 7-1 are connected together to serve as air inlets of the electromagnetic control valves and are connected to self-excitation air outlets of the corresponding self-excitation permanent magnet valve units 4. The outer ends of the two control eccentric pipes 7-1 are respectively two selective air outlets of an electromagnetic control valve.

When the control valve leakage port 7-8 of one control offset pipe 7-1 is blocked and gas is input into the gas inlet of the electromagnetic control valve, the control offset pipe 7-1 expands at the control valve restriction port 7-13, so that the other control offset pipe 7-1 is pressed to be blocked, and the gas input into the electromagnetic control valve is prevented from leaking from the control valve leakage port 7-8 of the unblocked control offset pipe 7-1.

In the embodiment, different output airflow forms can be realized by switching the first electromagnet 7-3 and the second electromagnet 7-7, so that the adaptability of the air path control device to complex air path control is improved.

Claims

1. A self-energizing pulsating gas flow generating device, characterized in that: comprises n self-excitation permanent magnet valve units (4), wherein n is more than or equal to 2; the self-excitation permanent magnet valve unit (4) comprises a self-excitation valve shell, a gas blocking permanent magnet (4-11), a first fixed permanent magnet (4-10), a second fixed permanent magnet (4-3), a sliding permanent magnet (4-9), a self-excitation offset pipe (4-1) and a gas pressure expansion pipe (4-7); the second fixed permanent magnet (4-3), the air blocking permanent magnet (4-11), the first fixed permanent magnet (4-10) and the sliding permanent magnet (4-9) are sequentially arranged in the self-excitation valve shell and are sequentially attracted to each other; the second fixed permanent magnet (4-3) is fixed with the self-energizing valve shell; the air blocking permanent magnet (4-11) is in sliding connection with the self-energizing valve shell; the first fixed permanent magnet (4-10) is fixed with the self-energizing valve shell; the sliding permanent magnet (4-9) is in sliding connection with the self-excitation valve shell; an air pressure expansion pipe (4-7) is arranged between the first fixed permanent magnet (4-10) and the sliding permanent magnet (4-9);

one end of the end closed pipe (4-4) and one end of the self-excitation bias pipe (4-1) are connected together to be used as an air inlet of the self-excitation permanent magnet valve unit (4); the end part closed pipe (4-4) passes through the space between the second fixed permanent magnet (4-3) and the air blocking permanent magnet (4-11); the self-excitation bias pipe (4-1) penetrates between the air-blocking permanent magnet (4-11) and the first fixed permanent magnet (4-10); self-excitation air leakage ports (4-12) are formed in the side faces, close to the air blocking permanent magnets (4-11), of the self-excitation offset pipe (4-1) and the end part closed pipe (4-4); the other end of the end closed pipe (4-4) is closed; the other end of the self-excitation offset pipe (4-1) is communicated with one end of a first output pipe (4-5) and one end of a second output pipe (4-6); the n self-excitation permanent magnet valve units (4) are sequentially connected end to end through a second output pipe (4-6) and a pneumatic expansion pipe (4-7) to form a closed loop; first output pipes (4-5) of the n self-excitation permanent magnet valve units (4) are used as n air outlets of the self-excitation driving module.

2. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: the self-excitation offset pipe (4-1) and the end closed pipe (4-4) can be inflated; the outer side of the self-energizing valve shell is provided with a self-energizing restriction opening (4-14); the self-excitation bias pipe (4-1) and the end closed pipe (4-4) both pass through the self-excitation restriction port (4-14).

3. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: the sectional area of a self-excitation air leakage port (4-12) on the end closed pipe (4-4) of one self-excitation permanent magnet valve unit (4) is larger than the sectional area of self-excitation air leakage ports (4-12) on the end closed pipes (4-4) of the other n self-excitation driving modules.

4. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: the outer side surface of the sliding permanent magnet (4-9) in one of the self-excitation permanent magnet valve units (4) is fixed with the connecting rod; the connecting rod extends out of the self-excitation bracket of the self-excitation driving module.

5. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: a starting electromagnet is arranged at the outer side of a second fixed permanent magnet (4-3) in one self-excitation permanent magnet valve unit (4) at intervals; the starting electromagnet is fixed on the self-excitation bracket; when the starting electromagnet is electrified, the sliding permanent magnet (4-9) is attracted and moves to a state of abutting against the self-excitation bias pipe (4-1).

6. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: one check valve with an inward output port is connected to the air pressure expansion pipe (4-7) in one of the self-excitation permanent magnet valve units (4); when the starting device is started, the input port of the one-way valve is connected with the output port of a starting air source; the gas flow output by the starting gas source is larger than the flow input by the driving gas source from the excitation offset pipe (4-1).

7. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: the magnetic shielding device also comprises a self-excitation outer frame (2) and a magnetic shielding foil plate (3); the magnetic shielding foil plate (3) is fixed on the self-excitation outer frame (2) and divides the interior of the self-excitation outer frame (2) into n installation cavities; the n self-excitation permanent magnet valve units (4) are respectively arranged in the n installation cavities.

8. A self-energizing pulsating gas flow generating device as claimed in claim 1, wherein: one or more air outlets of the self-excitation driving module are connected with an electromagnetic control valve (7); the electromagnetic control valve (7) comprises a control valve bracket (7-2), a suction sealing block (7-10), a first electromagnet (7-3), a second electromagnet (7-7) and a control eccentric pipe (7-1); the absorbing sealing blocks (7-10) are made of ferromagnetic materials; the first electromagnet (7-3) and the second electromagnet (7-7) are respectively fixed on two sides of the control valve bracket (7-2); the suction closing block (7-10) is connected in the control valve bracket (7-2) in a sliding way; the number of the control eccentric pipes (7-1) is two; one control deflection pipe (7-1) penetrates between the first electromagnet (7-3) and the absorption sealing block (7-10); the other control deflection pipe (7-1) penetrates through the space between the second electromagnet (7-7) and the absorption sealing block (7-10); one side of the two control offset pipes (7-1) close to the sucked sealing blocks (7-10) is provided with a control valve air leakage port (7-8); the inner ends of the two control eccentric pipes (7-1) are connected together and used as air inlets of the electromagnetic control valves; the outer ends of the two control eccentric pipes (7-1) are respectively two air outlets of an electromagnetic control valve.

9. A self-energizing pulsating gas flow generating device as claimed in claim 8, wherein: the suction closing block (7-10) is connected with the inner side wall of the control valve bracket (7-2) through a spring (7-9); the offset pipe (7-1) is controlled to be inflated to expand; a control valve restriction opening (7-13) is formed in the outer side of the control valve bracket (7-2); the two control offset pipes (7-1) both pass through the control valve restriction ports (7-13).

10. A method of generating a flow of gas from a self-energizing pulsating flow generating device as recited in claim 1, wherein:

inputting stable airflow to n air inlets of a self-excitation driving module; the n self-excitation permanent magnet valve units (4) are all in an initial state that gas blocking permanent magnets (4-11) are abutted against the end part closed pipe (4-4) to seal self-excitation gas leakage openings (4-12) on the end part closed pipe (4-4), so that gas input into the end part closed pipe (4-4) cannot leak; as the gas is fed, the gas pressure in the closed end pipe (4-4) rises and starts to expand in the radial direction, and the expanded closed end pipe (4-4) is stopped at the self-excitation restriction port (4-14) pressed therein; the gas blocking permanent magnet (4-11) receives the thrust brought by the gas pressure in the end closed pipe (4-4) through the self-excitation gas leakage port (4-12), and the thrust is continuously increased along with the continuous output of the gas out of the end closed pipe (4-4);

secondly, the air blocking permanent magnet (4-11) in one of the self-excitation permanent magnet valve units (4) is firstly pushed to the second fixed permanent magnet (4-3); the self-excitation air leakage port (4-12) of the end closed pipe (4-4) leaks, and the pressure of the end closed pipe (4-4) is released; a self-excitation air leakage port (4-12) of the self-excitation offset pipe (4-1) is blocked by an air blocking permanent magnet (4-11), air is input into the self-excitation offset pipe (4-1), the internal air pressure rises and the self-excitation offset pipe starts to expand along the radial direction, the expanded self-excitation offset pipe (4-1) extrudes in a self-excitation restriction port (4-14), and the end part of the self-excitation offset pipe (4-1) is cut off to close the pipe (4-4); gas is output from the first output pipe (4-5) and the second output pipe (4-6); the gas output by the second output pipe (4-6) enters a gas pressure expansion pipe (4-7) of the following self-excitation permanent magnet valve unit (4); the gas output by the first output pipe (4-5) enters an electromagnetic control valve or a corresponding driving elastic unit (6);

thirdly, after the gas output by the second output pipe (4-6) of the previous self-excitation permanent magnet valve unit (4) enters the gas pressure expansion pipe (4-7) in the next self-excitation permanent magnet valve unit (4), the gas pressure expansion pipe (4-7) in the next self-excitation permanent magnet valve unit (4) expands to push away the sliding permanent magnet (4-9), so that the attractive resultant force of the first fixed permanent magnet (4-10) and the sliding permanent magnet (4-9) on the gas blocking permanent magnet (4-11) in the next self-excitation permanent magnet valve unit (4) is reduced, the gas blocking permanent magnet (4-11) in the next self-excitation permanent magnet valve unit (4) slides to the self-excitation offset pipe (4-1), and the self-excitation air leakage port (4-12) of the self-excitation offset pipe (4-1) of the next self-excitation permanent magnet valve unit (4) is blocked, so that the first output pipe (4-5) and the second output pipe (4-6) of the latter self-excitation permanent magnet valve unit (4) output gas; meanwhile, the air blocking permanent magnet (4-11) in the previous self-excitation permanent magnet valve unit (4) is pushed by the air pressure of the self-excitation air leakage port (4-12) of the corresponding self-excitation offset pipe (4-1) to slide to the position of the self-excitation air leakage port (4-12) abutting against the end closed pipe (4-4) again, so that the self-excitation offset pipe (4-1) in the previous self-excitation permanent magnet valve unit (4) releases pressure, and the pressure release of the air pressure expansion pipe (4-7) in the latter self-excitation permanent magnet valve unit (4) is recovered to the original state; at the moment, the sliding permanent magnet (4-9) of the later self-excitation permanent magnet valve unit (4) is reset under the suction force of the first fixed permanent magnet (4-10); and the self-excitation driving module realizes the sequential and alternate pressurization and pressure release of the n air outlets of the self-excitation driving module under the condition of stable air pressure flow input.