CN116792283A - Moving-magnet high-frequency pump - Google Patents

Abstract

The application relates to a moving-magnet type high-frequency pump, which comprises a fixed shell, a stator coil module, a rotor magnet module, a fluid pipeline and a one-way fluid valve, wherein the stator coil module is fixedly arranged in the fixed shell, and the rotor magnet module is arranged in the stator coil module in a guiding way; a fluid pipeline is arranged in the fixed shell, a one-way fluid valve is arranged in the fluid pipeline, and the one-way fluid valve receives magnetic field control of the stator coil module. The fluid is controlled by variations in the electromagnetic field without the need for mechanically moving parts. Moving-magnet high-frequency pumps are generally composed of an electromagnetic coil and a permanent magnet, the electromagnetic coil generating a varying electromagnetic field around it by alternating current, the varying magnetic field generating attraction and repulsion forces to the permanent magnet, thereby vibrating the permanent magnet back and forth. When the permanent magnet vibrates, the permanent magnet can push the fluid connected to the permanent magnet, so that the fluid is conveyed, and the application can meet the use requirements of high frequency, high precision, no leakage, low noise and the like.

Description

Moving-magnet high-frequency pump

Technical Field

The application belongs to the field of high-frequency pumps, and particularly relates to a moving-magnet type high-frequency pump.

Background

Modern pumps are of many types: pressure pumps deliver fluids by increasing the pressure of the fluid, including centrifugal pumps, plunger pumps, gear pumps, screw pumps, and the like. Centrifugal pumps draw fluid in from the center by centrifugal force and expel it by centrifugal force. They are commonly used in water supply, cooling systems, and sewage treatment applications; screw pumps utilize rotation of a screw to propel a fluid. They are suitable for special applications such as high viscosity liquids, chemicals and petroleum; plunger pumps deliver fluid by reciprocating a plunger within a cylinder. They are commonly used for high pressure and high viscosity fluid delivery; gear pumps use the rotation of gears to intake and exhaust fluid. They are suitable for delivering low viscosity liquids such as fuel, lubricating oils and solvents. Still others are: peristaltic pumps push fluid by compressing and releasing a flexible tube or peristaltic rod. They are suitable for delivering volatile, perishable or high purity liquids; vortex pump: vortex pumps use the kinetic energy of a vortex to transport fluid. They are commonly used for treating liquids containing solid particles, such as sewage and slurries; vacuum pump: the vacuum pump is used for creating and maintaining a vacuum state and pumping gas out of the enclosed space. Including rotary vane pumps, turbo molecular pumps, root pumps, and the like. Rotary vane pump: rotary vane pumps use rotating vanes to pump out gas. They are suitable for applications in the low to medium vacuum range; molecular pump: the molecular pump eliminates gas molecules by a rotor rotating at high speed. They are suitable for high vacuum and ultra high vacuum applications. There are many other special purpose pumps such as submersible pumps, agitator pumps, pneumatic pumps, sandwich pumps, and the like. However, the existing pumps have the common problems of leakage and sealing, and meanwhile, the control precision of the existing pumps cannot meet the control requirement of high precision, and most of the existing pumps have the defects of high noise, high vibration, limited service life and the like.

Disclosure of Invention

Aiming at the defects of the prior art, the application provides a moving-magnet high-frequency pump which can meet the requirements of high-frequency work, high-precision control, noise-free vibration, no leakage, compactness and portability.

The application solves the technical problems by adopting the following technical scheme:

a moving magnet type high frequency pump, characterized in that: the stator coil module is fixedly arranged in the fixed shell, and the rotor magnet module is arranged in the stator coil module in a guiding way; a fluid pipeline is arranged in the fixed shell, a one-way fluid valve is arranged in the fluid pipeline, and the one-way fluid valve receives magnetic field control of the stator coil module.

Preferably, the stator coil module comprises four magnetic induction coils which are uniformly and symmetrically arranged in the fixed shell, and the magnetic induction coils are externally connected with an input power supply.

Preferably, the mover magnet module is a permanent magnet core.

Preferably, one end of the middle part of the permanent magnet core is fixed with a cantilever type displacement guiding rod, and a displacement sensor is arranged on a fixed shell at one side of the cantilever end of the displacement guiding rod.

Preferably, two spring pieces are fixedly arranged on two sides of the middle of the permanent magnet iron core through screws.

Preferably, the fluid pipeline is made of rubber materials without magnetism, and the one-way fluid valve is made of magnetic materials.

Preferably, the unidirectional fluid valve comprises a first valve block, a second valve block, a guide valve ring and a valve block shaft, wherein the valve block shaft is fixedly arranged in the middle of the guide valve ring, the first valve block and the second valve block are hinged to two sides of the valve block shaft respectively, the opening directions of the first valve block and the second valve block are the same, the first valve block and the second valve block can seal the inner diameter of the guide valve ring, the outer diameter of the guide valve ring is matched with a fluid pipeline, and the guide valve ring is installed in the fluid pipeline in a sliding fit manner.

Preferably, an air cooling module is mounted on the fixed shell.

Preferably, gold-based heat conduction silicone grease layers are arranged between the stator coil module and the fixed shell and between the fixed shell and the air cooling module for heat conduction.

The application has the advantages and positive effects that:

1. no mechanical moving parts: the high-frequency dynamic magnetic pump has no mechanical moving parts such as a rotating shaft, a sealing element or a piston. This allows them to have a longer lifetime and lower maintenance costs. Since the moving magnet pump has no mechanical moving parts, there are no problems of leakage and sealing. Conventional pumps may require the use of seals or shaft seals to prevent leakage, which may wear or fail over time.

2. High frequency operation: high frequency dynamic magnetic pumps typically operate at high frequencies so that fluid can be delivered in a quick and accurate manner. This is important for certain applications, such as microfluidic and precision experiments.

3. Compact and lightweight: since there are no mechanical moving parts, the high frequency moving magnet pump can be designed as a compact and lightweight device. This makes them very suitable for applications where space is limited or where movement is required.

4. Adjustability: by changing the current or frequency of the electromagnetic coil, the output flow and pressure of the high-frequency dynamic magnetic pump can be regulated. This allows them flexibility in different application scenarios. Can meet the requirements of high frequency, high precision, no leakage, low noise and the like

5. No lubrication requirement: while conventional pumps typically require lubrication to reduce friction and wear, moving magnet pumps do not require lubrication, avoiding the problems and maintenance associated with lubrication.

6. The present application provides a moving-magnetic high-frequency pump, which is a device for generating fluid movement by using electromagnetic force. It controls the fluid by variation of the electromagnetic field without the need for mechanical moving parts. Moving-magnet high-frequency pumps are generally composed of an electromagnetic coil and a permanent magnet, the electromagnetic coil generating a varying electromagnetic field around it by alternating current, the varying magnetic field generating attraction and repulsion forces to the permanent magnet, thereby vibrating the permanent magnet back and forth. When the permanent magnet vibrates, the permanent magnet can push the fluid connected to the permanent magnet, so that the fluid is conveyed, and the application can meet the use requirements of high frequency, high precision, no leakage, low noise and the like.

Drawings

Fig. 1: and a complete machine diagram of the moving-magnetic high-frequency reciprocating pump.

Fig. 2: a cross-section view of a moving-magnetic high-frequency reciprocating pump.

Fig. 3: a left cross-section view of the moving-magnetic high-frequency reciprocating pump.

Fig. 4: a structural schematic diagram of a one-way valve.

Reference numerals: 1. a spring piece; 2. a fluid line; 3. a magnetic induction coil; 4. a fixed housing; 5. an air cooling module; 6. a displacement guiding rod; 7. a displacement sensor; 8. a displacement sensor fixing member; 9. a one-way fluid valve; 9-1, a first valve plate; 9-2, a guide valve ring; 9-3, a second valve plate; 10. permanent magnet iron core.

Detailed Description

The application will now be described in further detail by way of specific examples, which are given by way of illustration only and not by way of limitation, with reference to the accompanying drawings.

The transverse and longitudinal directions mentioned in this embodiment are used for describing the relative positions of the structures, and do not limit the installation direction of the structures.

The moving-magnet type high-frequency pump comprises a fixed shell 4, a stator coil module, a rotor magnet module, a fluid pipeline 2 and a one-way fluid valve 9, wherein the fixed shell 4 is of a rectangular cubic frame structure, the fixed shell 4 can be of a frame structure with any shape according to the installation position, the stator coil module is fixedly arranged in the fixed shell 4, the rotor magnet module is arranged on the inner side of the stator coil module in a guiding way, and the rotor magnet module can move in a guiding way within the magnetic field range of the stator coil module; the middle part of the fixed shell 4 is provided with a fluid pipeline 2, the fluid pipeline 2 passes through the stator coil module, a one-way fluid valve 9 is arranged in the fluid pipeline 2, the one-way fluid valve 9 is arranged in the magnetic field range of the stator coil module, and the one-way fluid valve 9 is controlled to be opened or closed by the magnetic force of the rotor magnet module. The stator coil module inboard is provided with guide structure, controls the direction of movement of rotor magnet module.

The stator coil module in this embodiment is composed of four magnetic induction coils 3, and the four magnetic induction coils 3 are symmetrically and uniformly distributed in the fixed housing 4 through bolts. The four magnetic induction coils 3 are all externally connected with a power supply, and the periodic high-frequency changing current on the magnetic induction coils 3 generates a changing magnetic field to drive the reciprocating motion of the rotor magnet module. The number of magnetic induction coils 3 can be adjusted in the application according to the product mechanism and size.

The mover magnet module in this embodiment is a permanent magnet core 10, which is composed of a large-sized high-strength permanent magnet, the permanent magnet core 10 is a main actuating component, and continuously reciprocates in a varying magnetic field generated by the stator coil module to provide a core power source for reciprocation.

In order to restrict the maximum operating range of the permanent magnet core 10 and provide a gentle operating curve, two spring pieces 1 are fixedly mounted on both sides of the middle of the permanent magnet core 10 by screws.

In order to be convenient for the displacement of the permanent magnet core 10 of high accuracy control, a displacement guiding rod 6 that the cantilever type set up is fixed through the screw in the middle part one end of permanent magnet core 10, install a displacement sensor 7 (LVDT) on the fixed shell 4 of displacement guiding rod 6 cantilever end one side, this displacement sensor 7 passes through the displacement sensor 7 mounting to be fixed at fixed shell 4 surface, displacement sensor 7 real-time measurement permanent magnet core 10's displacement change condition and real-time feedback displacement data.

Two ends of the fluid pipeline 2 extend to the outside of the fixed shell 4 and can be connected with the external fluid pipeline 2 to be controlled; the fluid pipeline 2 of the application is made of rubber material without magnetism, and the one-way fluid valve 9 is made of magnetic material.

The structure of the unidirectional fluid valve 9 is shown in fig. 4, the unidirectional fluid valve 9 comprises a first valve plate 9-1, a second valve plate 9-3, a guide valve ring 9-2 and a valve plate shaft, the middle part of the guide valve ring 9-2 is fixedly provided with the valve plate shaft, the first valve plate 9-1 and the second valve plate 9-3 are hinged at two sides of the valve plate shaft respectively, the opening directions of the first valve plate 9-1 and the second valve plate 9-3 are the same, the first valve plate 9-1 and the second valve plate 9-3 can seal the inner diameter of the guide valve ring 9-2, the diameter of the guide valve ring 9-2 is matched with that of the fluid pipeline 2, the guide valve ring 9-2 is installed in the fluid pipeline 2 in a sliding fit manner, and the guide valve ring 9-2 moves reciprocally along with the rotor magnet module; the first valve plate 9-1 and the second valve plate 9-3 are made of ferromagnetic materials and swing back and forth along with the rotor magnet module. In the reciprocating process, the one-way fluid valve 9 is continuously opened and closed, liquid is allowed to pass through when the valve is opened, and the fluid is pushed to flow in one direction when the valve is closed, so that one-way transportation of the fluid is completed. Because the current can reciprocate at high frequency, the moving speed and the moving distance of the magnetic ring can be adjusted by adjusting the changing amplitude and the frequency of the current, so that the flow speed and the pulsation frequency of the fluid are controlled.

In order to avoid the influence of the heating of the components on the normal operation of the resistor and the electromagnetic pump, an air cooling module 5 is mounted on the fixed housing 4, and in this embodiment, two air cooling modules 5 are arranged and are respectively fixed on the fixed housing 4 through bolts to dissipate heat for the magnetic induction coil 3.

In order to further improve the heat dissipation efficiency, all set up gold-based heat conduction silicone grease layer between stator coil module and fixed shell 4, between fixed shell 4 and the forced air cooling module 5 and carry out heat conduction, can derive the heat dissipation with the temperature rapidly.

The technical scheme can be applied to the following occasions:

1. microfluidic control: in microfluidic chips, laboratory analysis and biomedical applications, high frequency dynamic magnetic pumps can precisely control the delivery and mixing of tiny liquid volumes.

2. Chemical and biological experiments: high frequency dynamic magnetic pumps can be used in automated laboratory equipment such as sample handling, drug delivery and mixing reactions.

3. Medical equipment: the high-frequency dynamic magnetic pump can be applied to medical equipment such as a drug delivery system, an artificial heart, blood circulation auxiliary equipment and the like.

4. Industrial automation: in industrial production, the high-frequency dynamic magnetic pump can be used for liquid conveying, precise spraying and chemical reaction control

Although the embodiments of the present application and the accompanying drawings have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the application and the appended claims, and therefore the scope of the application is not limited to the embodiments and the disclosure of the drawings.

Claims (9)

1. A moving magnet type high frequency pump, characterized in that: the stator coil module is fixedly arranged in the fixed shell (4), and the rotor magnet module is arranged in the stator coil module in a guiding way; a fluid pipeline (2) is arranged in the fixed shell (4), a one-way fluid valve (9) is arranged in the fluid pipeline (2), and the one-way fluid valve (9) receives the magnetic field control of the stator coil module.

2. The moving magnet type high frequency pump according to claim 1, wherein: the stator coil module comprises four magnetic induction coils (3), the four magnetic induction coils (3) are uniformly and symmetrically arranged in a fixed shell (4), and the magnetic induction coils (3) are externally connected with an input power supply.

3. The moving magnet type high frequency pump according to claim 1, wherein: the rotor magnet module is a permanent magnet core (10).

4. The moving magnet type high frequency pump according to claim 1, wherein: a displacement guiding rod (6) arranged in a cantilever mode is fixed at one end of the middle of the permanent magnet iron core (10), and a displacement sensor (7) is installed on a fixed shell (4) at one side of the cantilever end of the displacement guiding rod (6).

5. The moving magnet type high frequency pump according to claim 1, wherein: two spring pieces (1) are fixedly arranged on two sides of the middle of the permanent magnet iron core (10) through screws.

6. The moving magnet type high frequency pump according to claim 1, wherein: the fluid pipeline (2) is made of rubber materials without magnetism, and the one-way fluid valve (9) is made of magnetic materials.

7. The moving magnet type high frequency pump according to claim 1, wherein: the unidirectional fluid valve (9) comprises a first valve block (9-1), a second valve block (9-3), a guide valve ring (9-2) and a valve block shaft, wherein the middle part of the guide valve ring (9-2) is fixedly provided with the valve block shaft, the first valve block (9-1) and the second valve block (9-3) are hinged at two sides of the valve block shaft respectively, the opening directions of the first valve block (9-1) and the second valve block (9-3) are the same, the first valve block (9-1) and the second valve block (9-3) can seal the inner diameter of the guide valve ring (9-2), the outer diameter of the guide valve ring (9-2) is matched with the fluid pipeline (2), and the guide valve ring (9-2) is installed in the fluid pipeline (2) in a sliding fit mode.

8. The moving magnet type high frequency pump according to claim 1, wherein: an air cooling module (5) is arranged on the fixed shell (4).

9. The moving magnet type high frequency pump according to claim 1, wherein: and a gold-based heat conduction silicone grease layer is arranged between the stator coil module and the fixed shell (4) and between the fixed shell (4) and the air cooling module (5) for heat conduction.