CN115498844A - Linear Oscillating Motor Pump Based on Magnetic Structure and Its Linear Reciprocating Motion Method - Google Patents

Abstract

The invention discloses a linear oscillating motor pump based on a magnetic structure and a linear reciprocating motion method thereof. The linear oscillating motor pump includes a casing, a stator, a mover and a check valve; the mover includes a shaft core, a piston rod, a permanent magnet and a Permanent magnet 2; the stator includes an enameled coil winding, a fixing ring, a coil fixing frame and a magnetic yoke. The present invention realizes the guiding effect on the magnetic field through the cooperation of the first permanent magnet and the second permanent magnet, which are arc-shaped sheet-shaped, identical in structure and only have different magnetization directions, so that the magnetic field in the linear motor can flow between the first permanent magnet and the second permanent magnet. Each permanent magnet 1 and two axially adjacent permanent magnets 2 constitute a closed magnetic circuit, which replaces the Halbach magnetic ring structure, but can also achieve the functions of reducing magnetic field loss and improving magnetic induction intensity, and the permanent magnet The processing difficulty of the first permanent magnet and the second permanent magnet is greatly reduced, thereby greatly saving the processing cost.

Description

Linear Oscillating Motor Pump Based on Magnetic Structure and Its Linear Reciprocating Motion Method

technical field

The invention belongs to the field of electromagnetic technology, and in particular relates to a linear oscillation motor pump based on a magnetic structure and a linear reciprocating motion method thereof.

Background technique

The realization of the traditional linear reciprocating motion is mainly to convert the rotary motion into linear reciprocating motion through the motor driving the crank linkage mechanism. However, this method will generate large friction loss, low transmission efficiency, poor mechanical reliability and large manufacturing capacity. noise; therefore, with the development of technology, linear motors have become the first choice for linear motion. The existing linear motor abandons the traditional crank-link mechanism. It is a motor that directly converts electrical energy into magnetic energy, and then converts magnetic energy into mechanical energy. It can realize linear motion. Its basic principle is similar to that of traditional rotary motors. The structure is simple, and the linear reciprocating motion between the stator and the mover is achieved through magnetic energy, without involving too much mechanical transmission, so the internal stress environment is simple, and the lateral force and friction force are much larger than those of the traditional structure. reduce.

With the development of the petroleum industry, the requirements for linear motor pumps are getting higher and higher. Linear motor pumps are also developing in the direction of large output pressure, large flow, convenient manufacturing and maintenance, small size and light weight. As the core of the entire hydraulic system, the linear motor pump has a direct impact on the thrust and efficiency of the linear motor pump due to the layout design of its stator and mover, and the design of the winding; among them, the arrangement of the magnets on the mover and the magnetic field generated by the magnets, Both will affect the linear reciprocating motion of the mover, and the material of the shaft core of the mover will also affect the magnetic field. Therefore, reducing the influence of the shaft core material on the magnetic field is an effective way to improve the efficiency of the linear motor pump; The arrangement of the magnets on the subs mostly adopts the Halbach magnetic ring structure, which can play a good guiding role in the magnetic field, so that the magnetic field can not pass through the shaft core, so that the magnetic field can maintain a high magnetic field; but the cost of the magnet based on the Halbach magnetic ring structure It is expensive, and the production cost is high, and it is difficult to obtain, so the production cost of the linear motor pump is greatly increased; Linear motor pump.

Contents of the invention

In order to solve the above problems, the present invention proposes a linear oscillating motor pump based on a magnetic structure and its linear reciprocating motion method, through the cooperation of the permanent magnet 1 and the permanent magnet 2, replacing the Halbach magnetic ring structure, but also reducing magnetic field loss and improving magnetic induction Intensity function, thereby improving the working efficiency of the linear motor.

The technical scheme that the present invention adopts is as follows:

The linear oscillating motor pump based on the magnetic structure of the present invention includes a DC motor and a check valve; the DC motor includes a housing, a stator and a mover; the two ends of the housing are respectively fixed to the two piston chambers; the stator and the mover are both Placed in the housing; the mover includes a shaft core, a piston rod, a permanent magnet 1 and a permanent magnet 2; the two ends of the shaft core are respectively fixedly connected to the two piston rods; the two piston rods are arranged coaxially, and each Both the piston rod and the housing form a sliding pair; each piston rod extends into a corresponding piston cavity; the permanent magnet 1 and the permanent magnet 2 are both arc-shaped and fixed to the shaft core; the end of the permanent magnet 1 facing the center of the circle is the S pole, the other end is the N pole, the end of the permanent magnet two towards the center of the circle is the N pole, and the other end is the S pole; n permanent magnets are arranged equidistantly along the circumferential direction of the shaft core to form a permanent magnet ring group one, n≥ 3; n permanent magnets are arranged equidistantly along the circumferential direction of the shaft core to form the second permanent magnet ring group; m+1 permanent magnet ring group 1 and m permanent magnet ring group 2 are arranged equidistantly along the axial direction of the shaft core, m≥2; a permanent magnet ring group 2 is arranged between every two adjacent permanent magnet ring group 1s.

The stator includes an enameled coil winding, a fixed ring, a coil fixing frame and a magnetic yoke; a magnetic yoke is provided between each permanent magnet ring group one and the housing, and a magnetic yoke is provided between each permanent magnet ring group two and the housing. There is also a magnetic yoke between the positions; the magnetic yoke is in the shape of a ring as a whole, and is fixedly connected with the inner wall of the housing; every two adjacent magnetic yokes enclose a coil installation slot; each coil installation slot There is a fixed ring; the fixed ring is provided with an integrally formed coil fixing frame; each coil fixing frame is fixed with an enameled coil winding; each enameled coil winding is connected to a power supply, and two adjacent enameled coil windings The current flows in the opposite direction.

The one-way valve includes a valve body, a valve core, a spring and a retaining ring; the retaining ring is fixedly connected to the inner wall of the valve body; the valve core and the valve body form a sliding pair, and pass through the retaining ring The spring one connects. The two piston chambers at both ends of the housing are respectively connected to one of the interfaces of the two three-way joints; the other two interfaces of each three-way joint are respectively connected to one end of the two straight-through joints; the two straight-through joints at the same end of the housing Among them, the other end of one of the straight-through joints is connected to the valve body input port of one check valve, and the other end of the other straight-through joint is connected to the valve body output port of another one-way valve.

Preferably, the housing is formed by fixing two parts facing each other.

Preferably, a guide copper sleeve is fixed at both ends of the housing, and the two guide copper sleeves and the two piston rods form sliding pairs respectively.

More preferably, each guide copper sleeve is connected to one end of a spring two; each spring two is sleeved on a piston rod, and the other end of each spring two is fixed to a corresponding piston rod.

Preferably, a spacer ring is provided between each adjacent permanent magnet ring group 1 and permanent magnet ring group 2, and both the permanent magnet ring group 1 and the permanent magnet ring group 2 are fixed to the shaft core through the spacer ring.

More preferably, a spacer is provided between each adjacent two permanent magnets in the same permanent magnet ring group one and between each adjacent two permanent magnets two in the same permanent magnet ring group two.

More preferably, the spacer is made of non-magnetic material.

The linear reciprocating motion method of the linear oscillating motor pump based on the magnetic structure of the present invention is specifically as follows:

Start each power supply to supply power to each enamelled coil winding, and the current direction of the adjacent enameled coil winding is opposite, so that each enamelled coil winding generates electromagnetic induction, so that each permanent magnet one and the two axially adjacent permanent magnets two A closed magnetic circuit is formed, and under the action of repulsion of the same pole and attraction of different poles, the magnetic force generated by each enamelled coil winding drives the mover composed of each permanent magnet 1, each permanent magnet 2, shaft core and piston rod to the shell. One end of the body slides; when the current direction of the power supply to each enameled coil winding is changed, the magnetic poles generated by each enameled coil winding change, making the mover slide to the other end of the housing; when the current direction in each enameled coil winding cycles When changing, the mover can periodically reciprocate in a straight line in the housing; during the periodical reciprocating motion of the mover, a one-way valve at the end of the mover’s movement direction will discharge the gas under the action of pressure difference Or liquid, a one-way valve at the other end sucks gas or liquid under the action of pressure difference, and the other two one-way valves are not activated.

Preferably, a plurality of linear oscillating motor pumps based on a magnetic structure work in parallel, and the outward-facing one-way valves of each linear oscillating motor pump based on a magnetic structure are connected to the driven hydraulic parts, and each linear oscillating motor pump based on a magnetic structure The one-way valves with the output port facing inward of the pump are all connected with the medium storage tank.

The beneficial effects that the present invention has are:

1. The present invention realizes the guiding effect on the magnetic field through the cooperation of the first permanent magnet and the second permanent magnet, which are arc-shaped sheet-shaped, identical in structure, but have different magnetization directions, so that the magnetic field in the linear motor can flow between the first permanent magnet and the second permanent magnet. The transmission between the two magnets, each permanent magnet one and the two axially adjacent permanent magnets two constitute a closed magnetic circuit, which replaces the Halbach magnetic ring structure, but can also achieve the functions of reducing magnetic field loss and improving magnetic induction intensity, and then Improve the working efficiency of the linear motor. Compared with the Halbach magnetic ring structure, the arc-shaped sheet shape of the permanent magnet 1 and the permanent magnet 2 and the magnetic polarity of the inner and outer arc parts are different, and the processing difficulty is greatly reduced, thereby greatly saving the processing cost.

2. The magnetic yoke of the present invention is in the shape of a ring as a whole, and only one enamelled coil winding is installed in the coil installation slot surrounded by two adjacent magnetic yokes, so that the stator of the present invention has a simple structure and is easy to process.

3. The present invention can adopt multi-stage parallel operation, which can improve work efficiency and anti-fault ability, meet the industrial demand for large-flow, high-pressure hydraulic systems, and has better applicability in industrial production.

4. The shaft core of the present invention can be made of light and high-strength non-magnetic material, which not only greatly reduces the mass of the mover, but also avoids magnetic loss caused by the magnetic field passing through the shaft core.

Description of drawings

Fig. 1 is a sectional view of the overall structure of the present invention;

Figure 2 is an enlarged view of part A-A in Figure 1;

Fig. 3 is the schematic diagram that permanent magnet one and spacer block are arranged at intervals along the circumferential direction among the present invention;

Fig. 4 is a schematic diagram of multi-stage joint work of the present invention.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

The linear oscillating motor pump based on the magnetic structure of the present invention, as shown in Figure 1, Figure 2 and Figure 3, includes a DC motor and a check valve; the DC motor includes a housing 10, a stator and a mover; the two ends of the housing 10 are connected to the two The two piston chambers 7 are respectively fixed; the stator and the mover are all placed in the housing 10; the mover includes a shaft core 13, a piston rod 8, a permanent magnet 22 and a permanent magnet 2 23; the two ends of the shaft core 13 are connected to the two pistons. The rods 8 are fixedly connected respectively; two piston rods 8 are coaxially arranged, and each piston rod 8 forms a sliding pair with the housing 10; each piston rod 8 extends into a corresponding piston chamber 7; the permanent magnet one 22 and the permanent magnet Magnet two 23 are all arc-shaped sheets, and are all fixed to the shaft core 13; one end of permanent magnet one 22 towards the center of the circle is an S pole (the part not filled in color in Figure 1), and the other end is an N pole (filled with black in Figure 1 part), one end of the permanent magnet two 23 towards the center of the circle is an N pole, and the other end is an S pole; n permanent magnets one 22 are equidistantly arranged along the circumferential direction of the shaft core 13 to form a permanent magnet ring group one, n≥3; n The second permanent magnet 23 is equidistantly arranged along the circumferential direction of the shaft core to form the second permanent magnet ring group; m+1 permanent magnet ring group 1 and m permanent magnet ring group 2 are arranged equidistantly along the axial direction of the shaft core 13, m≥ 2. A permanent magnet ring group 2 is arranged between every two adjacent permanent magnet ring group 1; the magnetic force lines of the adjacent permanent magnet 1 22 and permanent magnet 2 23 aligned in the circumferential direction form a closed magnetic circuit.

The stator includes an enameled coil winding 15, a fixed ring 17, a coil holder 16 and a yoke 14; a yoke 14 is arranged between each permanent magnet ring group one and the housing 10, and each permanent magnet ring group two is connected to the housing 10. There is also a magnetic yoke 14 between the housings 10; the magnetic yoke 14 is in the shape of a ring as a whole, and is fixedly connected with the inner wall of the housing 10; every two adjacent magnetic yokes 14 enclose a coil installation groove; A fixed ring 17 is fixed in each coil mounting groove; an integrally formed coil fixing frame 16 is provided on the fixing ring 17; an enamelled coil winding 15 is fixed on each coil fixing frame 16; each enamelled coil winding 15 is connected with A power supply is connected, and the current directions of the two adjacent enameled coil windings 15 are opposite. Among them, the power supply can be connected with the controller through the relay and controlled by the controller.

As shown in Figure 1, the one-way valve includes a valve body 3, a valve core 4, a spring 5 and a retaining ring 2; the retaining ring 2 is fixedly connected to the inner wall of the valve body 3; the valve core 4 and the valve body 3 form a sliding pair, And be connected with retaining ring 2 by spring one 5. The two piston cavities 7 at both ends of the housing 10 are respectively connected to one of the interfaces of the two three-way joints 1; the other two interfaces of each three-way joint 1 are respectively connected to one end of the two straight-through joints 6; Among the two straight joints 6 at the same end, the other end of one straight joint 6 is connected to the valve body input port of a one-way valve, and the other end of the other straight joint 6 is connected to the valve body output port of another one-way valve.

As a preferred embodiment, the housing 10 is formed by connecting two facing parts through a bolt 11 and a nut 12; the detachable structure of the housing 10 facilitates the installation and replacement of the mover and the stator.

As a preferred embodiment, the housing 10 is fixedly connected to the piston chamber 7 through bolts 9 .

As a preferred embodiment, a guide copper sleeve 21 is fixed at both ends of the housing 10, and the two guide copper sleeves 21 and the two piston rods 8 form sliding pairs respectively.

As a more preferred embodiment, each guide copper sleeve 21 is connected to one end of a spring two 20; each spring two 20 is sleeved on a piston rod 8, and the other end of each spring two 20 is connected to a corresponding piston rod 8 is fixed; when the shaft core 13 makes linear reciprocating motion in the housing 10, the spring 220 can reduce the collision between the shaft core 13 and the housing 10, store elastic potential energy, and improve the linear reciprocating efficiency of the shaft core 13.

As a preferred embodiment, the shaft core 13 is connected to each piston rod 8 through a plurality of bolts 19 .

As a preferred embodiment, a spacer ring 18 (using non-magnetic material) is arranged between each adjacent permanent magnet ring group one and permanent magnet ring group two, and the permanent magnet ring group one and the permanent magnet ring group two pass through The spacer ring 18 is fixed to the shaft core 13; the spacer ring 18 separates and fixes the permanent magnet ring group 1 and the permanent magnet ring group 2.

As a more preferred embodiment, as shown in Figure 3, between each adjacent two permanent magnets in the same permanent magnet ring group one 22 and between each adjacent two permanent magnets in the same permanent magnet ring group two A spacer block 24 is arranged between the two 23; the spacer block 24 acts as an equidistant separation between two adjacent permanent magnets 22 or two adjacent permanent magnets 23 of the shaft core 13.

As a more preferred embodiment, the spacer block 24 is made of a non-magnetic material, so that the circumferentially aligned and adjacent pairs of the first permanent magnet 22 and the second permanent magnet 23 form local closed-loop magnetic lines without interfering with each other.

In the case that the above-mentioned embodiments are all available, the linear reciprocating motion method of the linear oscillating motor pump based on the magnetic structure of the present invention is as follows:

Each power supply is started to supply power to each enamelled coil winding 15, and the current direction of the adjacent enamelled coil winding 15 is opposite, so that each enamelled coil winding 15 produces electromagnetic induction, so that each permanent magnet-22 is connected to two axially adjacent ones. The two permanent magnets 23 all constitute closed magnetic circuits, as shown in Figure 2, and under the effect of homopolar repulsion and heteropolar attraction, the magnetic force produced by each enamelled coil winding 15 drives each permanent magnet one 22, each permanent magnet The mover composed of two 23, the shaft core 13 and the piston rod 8 slides towards one end of the housing 10; when the current direction of the power supply to each enamelled coil winding 15 is changed, the magnetic poles produced by each enamelled coil winding 15 change, so that the mover Slide to the other end of the housing 10; when the current direction in each enameled coil winding 15 changes periodically, the mover can periodically reciprocate linearly in the housing 10; when the mover periodically reciprocates linearly During the movement, a one-way valve at the end pointed by the moving direction of the mover discharges gas or liquid under the action of pressure difference, a one-way valve at the other end sucks gas or liquid under the action of pressure difference, and the other two one-way valves are Unstarted state; as shown in Figure 1, when the mover moves to the right, the external gas or liquid pushes away the spool 4 in the one-way valve located at the upper left, and enters the straight-through joint 6 connected to the one-way valve, and then into the left three-way joint 1, and the spool 4 in the one-way valve at the lower right is pushed to discharge gas or liquid; when the mover moves to the left, the external gas or liquid pushes against the one-way valve at the upper right. The spool 4 in the one-way valve enters the straight-through joint 6 connected to the one-way valve, and then enters the three-way joint 1 on the right, while the spool 4 in the one-way valve at the lower left is pushed back to discharge gas or liquid; When the two one-way valves at both ends of the housing 10 with output ports facing outward are connected to the driven hydraulic parts, the other two one-way valves are connected to the medium storage tank (when the medium is air, the two one-way valves are not connected) At this time, the magnetic structure-based linear oscillating motor pump of the present invention can realize the movement of the driven hydraulic parts.

As a preferred embodiment, as shown in Figure 4, multiple linear oscillating motor pumps based on magnetic structures work in parallel, and the outward-facing one-way valves of each linear oscillating motor pump based on magnetic structures are connected to the driven hydraulic components , the one-way valve with the output port facing inward of each linear oscillation motor pump based on the magnetic structure is connected with the medium storage tank; parallel operation can improve the working efficiency of the linear oscillation motor pump, improve the anti-fault ability, and achieve industrial requirements for large flow, High pressure hydraulic system needs.

Claims (9)

1. The linear oscillation motor pump based on the magnetic structure comprises a direct current motor and a one-way valve; the direct current motor comprises a shell, a stator and a rotor; two ends of the shell are respectively fixed with the two piston cavities; the stator and the rotor are both arranged in the shell; the method is characterized in that: the rotor comprises a shaft core, a piston rod, a first permanent magnet and a second permanent magnet; two ends of the shaft core are respectively and fixedly connected with the two piston rods; the two piston rods are coaxially arranged, and each piston rod and the shell form a sliding pair; each piston rod extends into a corresponding piston cavity; the first permanent magnet and the second permanent magnet are both arc-shaped sheets and are both fixed with the shaft core; one end of the first permanent magnet, which faces the circle center, is an S pole, the other end of the first permanent magnet is an N pole, one end of the second permanent magnet, which faces the circle center, is an N pole, and the other end of the second permanent magnet is an S pole; the n permanent magnets I are arranged at equal intervals along the circumferential direction of the shaft core to form a permanent magnet ring group I, and n is more than or equal to 3; the n permanent magnets II are arranged at equal intervals along the circumferential direction of the shaft core to form a permanent magnet ring group II; m +1 permanent magnet ring groups I and m permanent magnet ring groups II are arranged along the axial direction of the shaft core at equal intervals, and m is more than or equal to 2; a permanent magnet ring group II is arranged between every two adjacent permanent magnet ring groups I;

the stator comprises an enameled coil winding, a fixing ring, a coil fixing frame and a magnetic yoke; a magnetic yoke is arranged between each first permanent magnet ring group and the shell, and a magnetic yoke is also arranged between each second permanent magnet ring group and the shell; the magnet yoke is annular and fixedly connected with the inner wall surface of the shell; each two adjacent magnetic yokes surround a coil mounting groove; a fixing ring is fixed in each coil mounting groove; the fixing ring is provided with an integrally formed coil fixing frame; an enameled coil winding is fixed on each coil fixing frame; each enameled coil winding is connected with a power supply, and the current directions of two adjacent enameled coil windings are opposite;

the one-way valve comprises a valve body, a valve core, a first spring and a retainer ring; the check ring is fixedly connected with the inner wall surface of the valve body; the valve core and the valve body form a sliding pair and are connected with the check ring through a first spring; two piston cavities at two ends of the shell are respectively connected with one interface of the two three-way joints; the other two interfaces of each three-way joint are respectively connected with one ends of the two straight-through joints; and in the two through joints positioned at the same end of the shell, the other end of one through joint is connected with the valve body input port of one-way valve, and the other end of the other through joint is connected with the valve body output port of the other one-way valve.

2. The linear oscillating motor pump based on a magnetic structure of claim 1, wherein: the shell is formed by fixing two opposite parts.

3. The linear oscillating motor pump based on a magnetic structure of claim 1, wherein: two ends of the shell are both fixed with a guide copper sleeve, and the two guide copper sleeves and the two piston rods respectively form a sliding pair.

4. The linear oscillating motor pump based on a magnetic structure of claim 3, wherein: each guide copper sleeve is connected with one end of one spring II; each second spring is sleeved on one piston rod, and the other end of each second spring is fixed with the corresponding piston rod.

5. The linear oscillating motor pump based on a magnetic structure according to any one of claims 1 to 4, wherein: and a spacing ring is arranged between each adjacent permanent magnet ring group I and each adjacent permanent magnet ring group II, and the permanent magnet ring group I and the permanent magnet ring group II are fixed with the shaft core through the spacing rings.

6. The linear oscillating motor pump based on magnetic structure of claim 5, characterized in that: and spacing blocks are arranged between every two adjacent permanent magnets in the same permanent magnet ring group I and between every two adjacent permanent magnets in the same permanent magnet ring group II.

7. The linear oscillating motor pump based on a magnetic structure of claim 6, wherein: the spacing block is made of non-magnetic materials.

8. The linear reciprocating method of a linear oscillating motor pump based on a magnetic structure as claimed in claim 7, wherein: the method comprises the following specific steps:

each power supply is started to supply power to each enameled coil winding, the current directions introduced by the adjacent enameled coil windings are opposite, each enameled coil winding generates electromagnetic induction, each permanent magnet I and two permanent magnets II which are axially adjacent form a closed magnetic loop, and under the action of homopolar repulsion and heteropolar attraction, magnetic force generated by each enameled coil winding drives a rotor consisting of each permanent magnet I, each permanent magnet II, a shaft core and a piston rod to slide to one end of a shell; when the current direction of the power supply for supplying power to each enameled coil winding is changed, the magnetic poles generated by each enameled coil winding are changed, so that the rotor slides to the other end of the shell; when the current direction in each enameled coil winding is periodically changed, the rotor can periodically perform linear reciprocating motion in the shell; in the periodic linear reciprocating motion process of the rotor, one-way valve at the end of the rotor in the motion direction discharges gas or liquid under the action of pressure difference, one-way valve at the other end sucks gas or liquid under the action of pressure difference, and the other two one-way valves are in an unactivated state.

9. The linear reciprocating method of a linear oscillating motor pump based on a magnetic structure as claimed in claim 8, wherein: the linear oscillation motor pumps based on the magnetic structures are connected in parallel for operation, one-way valves with outward output ports of the linear oscillation motor pumps based on the magnetic structures are connected with the driven hydraulic part, and one-way valves with inward output ports of the linear oscillation motor pumps based on the magnetic structures are connected with the medium storage tank.

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