Magnetorheological fluid-based piston motion waste energy hybrid harvesting device and method

Abstract

The application relates to a piston motion waste energy mixed collection device and method based on a magneto-rheological fluid, which comprises a cylinder and an energy storage circuit, the cylinder comprises a magneto-rheological fluid cavity and a piston cavity located in the magneto-rheological fluid cavity, a shiftable magneto-rheological fluid body is arranged in the magneto-rheological fluid cavity, the energy storage circuit comprises a coil wound outside the magneto-rheological fluid cavity and an energy storage element electrically connected with the coil, a piston capable of moving through the coil and having magnetism is arranged in the piston cavity, the method comprises the following steps: based on the above device, when the piston moves in the piston cavity and / or the cylinder vibrates, the magneto-rheological fluid is magnetized and / or periodically shaken in the magneto-rheological fluid cavity to cause the magnetic flux of the coil to change, an electric current is generated in the coil and energy is stored to the energy storage element, the device can be used for supplying power for micro-electric equipment, is beneficial to reducing energy consumption, improving resource utilization and mechanical energy-electric energy conversion efficiency, and can effectively solve the waste of two kinds of independent waste energies including piston reciprocating motion and vibration generated in equipment operation.

Description

Technical Field

[0001] This invention belongs to the field of energy harvesting and utilization technology, specifically relating to a device and method for collecting waste energy from piston motion based on magnetorheological fluid. Background Technology

[0002] A cylinder is a cylindrical mechanical component in which a piston reciprocates linearly within it. It converts compressed air pressure, hydraulic energy, and heat energy into mechanical energy through pneumatic, hydraulic, or crankshaft transmissions, driving the piston in its linear reciprocating motion. Cylinders have a wide range of applications, such as turbines, rotary piston engines, and printing presses. However, during the piston's movement, two types of energy are wasted: the reciprocating motion of the piston itself and the vibrations generated during cylinder operation. A significant amount of this wasted energy remains unused.

[0003] The development of micro-electronic devices is gradually moving away from traditional battery power supply, resulting in devices based on wind, solar, and wave energy to power micro-electronic devices. Micro-electronic devices that collect and mix the waste energy from piston motion for use in related equipment are of great significance for reducing energy consumption and improving resource utilization.

[0004] When recovering vibration energy electromagnetically, the moving permanent magnet moves relative to the outer winding. Although the outer winding cuts the moving magnetic field of the permanent magnet to generate induced alternating current, the conversion efficiency of mechanical energy to electrical energy is not high, and it is impossible to collect and utilize the waste vibration kinetic energy generated during the operation of the cylinder equipment. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the above-mentioned technical problems. The present invention provides a device for collecting and utilizing waste energy from piston motion based on magnetorheological fluid, which improves the conversion efficiency of mechanical energy to electrical energy and can effectively solve the two independent waste energy problems, including piston reciprocating motion and vibration generated during equipment operation.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A waste energy collection device based on magnetorheological fluid piston motion includes a cylinder and an energy storage circuit. The cylinder includes a magnetorheological fluid chamber and a piston chamber. The magnetorheological fluid chamber contains a magnetorheological fluid that can slosh around. The energy storage circuit includes a coil wound around the magnetorheological fluid chamber and an energy storage element electrically connected to the coil. The piston chamber contains a magnetic piston that can move through the coil.

[0008] Furthermore, the magnetorheological fluid cavity can cover the winding location of the coil. The magnetorheological fluid is a suspension formed by immersing micron- or nano-sized ferromagnetic particles in a non-magnetic carrier liquid and a small amount of other auxiliary solutions. Magnetorheological fluids possess both magnetism and fluidity, offering significant advantages over solid magnets in applications involving minute gaps. The ferromagnetic particles, influenced by the piston's magnetic field, are arranged with the same poles within the magnetorheological fluid. The periodic sloshing of the fluid causes a change in the magnetic flux of the coil, thereby generating a current within the coil.

[0009] Furthermore, the energy storage circuit includes a rectifier electrically connected to the coil and the energy storage element. The rectifier is used to convert alternating current into direct current to facilitate energy storage and collection by the energy storage element.

[0010] Furthermore, the rectifier is a bridge rectifier consisting of multiple rectifier diodes connected in a bridge configuration, which has the advantages of high rectification efficiency and good stability.

[0011] Furthermore, the energy storage element is a capacitor, which has charging and discharging functions.

[0012] Furthermore, the energy storage circuit is connected to a microelectronic device, which is used to realize functions such as data acquisition, processing, and transmission.

[0013] Furthermore, the piston chamber is located within the magnetorheological fluid chamber, and the piston is connected to a piston rod extending out of the cylinder. The piston rod is used to connect and support the piston in performing work.

[0014] A method for collecting waste energy from piston motion based on magnetorheological fluid, comprising: a device for collecting waste energy from piston motion based on magnetorheological fluid as described in any one of the above, wherein when the piston moves within the piston chamber and / or vibrates the cylinder, the magnetorheological fluid is magnetized within the magnetorheological fluid chamber and / or periodically shakes, causing a change in the magnetic flux of the coil, generating a current in the coil and storing the energy in the energy storage element.

[0015] Furthermore, the current generated in the coil is rectified into DC and stored in the energy storage element.

[0016] Furthermore, the energy storage circuit is used to power the micro-devices, fulfilling their functions such as data acquisition, processing, and transmission.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] (1) Waste kinetic energy collection during piston reciprocating motion: When a magnetic piston reciprocates through the coil in the piston cavity, the magnetorheological fluid is rapidly magnetized under the influence of the magnetic field of the magnetic piston, causing an instantaneous change in the magnetic flux of the coil, generating and storing current in the coil. Based on the easy flow property of the magnetorheological fluid, a local magnetic field concentration phenomenon is rapidly generated during the piston movement, which has a significant advantage in terms of magnetic induction energy conversion efficiency compared to a single coil.

[0019] (2) Collection of waste vibration kinetic energy generated during the operation of cylinder equipment: The vibration generated during the operation of the cylinder equipment forces the magnetorheological fluid to sway back and forth periodically in the liquid cavity. The ferromagnetic particles affected by the piston magnetic field force are arranged with the same pole in the magnetorheological fluid. The periodic swaying of the magnetorheological fluid causes the magnetic flux of the coil to change, generating current in the coil and storing and collecting it.

[0020] In summary, this method effectively solves the waste of two types of energy: the reciprocating motion of the piston and the vibration generated during equipment operation. Both of these independent waste energy sources can be effectively mixed, recycled, and reused, improving the conversion efficiency of mechanical energy to electrical energy. The current is rectified into DC by a bridge rectifier and stored in a capacitor, which can be used to power micro-electronic devices on related equipment, thereby reducing energy consumption and improving resource utilization. Attached Figure Description

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of a structure according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram illustrating the principle of recovering waste kinetic energy from the reciprocating motion of a piston according to one embodiment of the present invention.

[0024] Figure 3 This is a comparison graph of the relationship between piston motion frequency and voltage RMS between one embodiment of the present invention and a comparative example.

[0025] Figure 4 This is a schematic diagram illustrating the principle of waste kinetic energy recovery under mechanical vibration according to one embodiment of the present invention.

[0026] In the diagram: cylinder 1, magnetorheological fluid chamber 101, piston chamber 102, energy storage circuit 2, coil 201, capacitor C, diode D1, diode D2, diode D3, diode D4, magnetorheological fluid 3, piston 4, piston rod 401, micro-electronic device 5. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" or "several" means two or more, unless otherwise explicitly specified.

[0029] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] like Figure 1 The image shows a preferred embodiment of the piston-movement waste energy mixing and collection device based on magnetorheological fluid according to the present invention. The collection device includes a cylinder 1 and an energy storage circuit 2. The cylinder 1 includes a magnetorheological fluid chamber 101 and a piston chamber 102 located within the magnetorheological fluid chamber 101. The magnetorheological fluid chamber 101 contains a magnetorheological fluid 3 that can be swayed. The energy storage circuit 2 includes a coil 201 wound around the magnetorheological fluid chamber 101 and an energy storage element electrically connected to the coil 201. The piston chamber 102 contains a piston 4 that can perform piston movement through the coil 201 and has magnetic properties.

[0031] Furthermore, the magnetorheological fluid cavity 101 can cover the winding position of the coil 201, so that the magnetorheological fluid 3 can cover the winding position of the coil 201 when it shakes.

[0032] Furthermore, the magnetorheological fluid 3 occupies half the volume of the magnetorheological fluid chamber 101. The magnetorheological fluid 3 is a suspension formed by immersing micron- or nano-sized ferromagnetic particles in a non-magnetic carrier liquid and a small amount of other auxiliary solutions. The magnetorheological fluid 3 possesses both magnetism and fluidity, offering significant advantages over solid magnets in applications involving minute gaps. The ferromagnetic particles, influenced by the magnetic field force of the piston 4, are arranged with the same poles in the magnetorheological fluid 3. The periodic swaying of the magnetorheological fluid 3 causes a change in the magnetic flux of the coil 201, thereby generating a current in the coil 201.

[0033] Furthermore, the energy storage circuit 2 includes a rectifier electrically connected to the coil 201 and the energy storage element. The rectifier is used to convert alternating current into direct current, which facilitates energy storage and collection by the energy storage element.

[0034] Furthermore, the rectifier is a bridge rectifier consisting of four rectifier diodes D1, D2, D3 and D4 connected in pairs to form a bridge. The two ends of the coil 201 are connected to the bridge rectifier, and rectification is performed through the unidirectional conductivity of the diodes. It has the advantages of high rectification efficiency and good stability.

[0035] Furthermore, the energy storage element is a capacitor C, which is connected in parallel with a bridge rectifier. The negative terminal of the capacitor C is grounded and has a charging and discharging function. The bridge rectifier limits the current of the capacitor C from flowing back to the coil 201, protecting the coil 201 from being burned out by the reverse current.

[0036] When the positive half-cycle of the input sine wave is applied, diodes D1 and D3 conduct when forward voltage is applied, and diodes D2 and D4 are cut off when reverse voltage is applied. This forms a circuit connecting coil 201, diode D1, capacitor C, and diode D3, creating a half-wave rectified voltage with positive voltage at the top and negative voltage at the bottom. When the negative half-cycle of the input sine wave is applied, diodes D2 and D4 conduct when forward voltage is applied, and diodes D1 and D3 are cut off when reverse voltage is applied. This forms another circuit connecting coil 201, diode D2, capacitor C, and diode D4, creating the other half-wave rectified voltage with positive voltage at the top and negative voltage at the bottom.

[0037] Furthermore, the energy storage circuit 2 is connected to a micro-device 5, which is used to realize functions such as data acquisition, processing, and transmission.

[0038] Furthermore, piston 4 is connected to a piston rod extending out of cylinder 1, and the piston rod is used to connect and support piston 4 to perform work.

[0039] Furthermore, the cylinder 1 is a pneumatic cylinder, which is a cylindrical metal component that guides the piston 4 to perform linear reciprocating motion inside the cylinder. The pressure of compressed air is converted into mechanical energy through pneumatic transmission to drive the piston 4 to perform linear reciprocating motion.

[0040] The method for collecting waste energy from piston motion based on magnetorheological fluid includes: based on the magnetorheological fluid-based waste energy collection device, when the piston 4 moves within the piston chamber 102 and / or the cylinder 1 vibrates, the magnetorheological fluid 3 is magnetized within the magnetorheological fluid chamber 101 and / or periodically shakes, causing a change in the magnetic flux of the coil 201, generating a current in the coil 201, rectifying the current generated in the coil 201 into direct current and storing it in an energy storage element, wherein the energy storage circuit 2 is used to power the micro-device 5.

[0041] like Figure 2 As shown, when the magnetic piston 4 reciprocates through the coil 201 within the piston cavity 102, the magnetic field strength around the piston 4 decreases with increasing distance. The magnetorheological fluid 3 is rapidly magnetized under the influence of the magnetic field of the magnetic piston 4, causing an instantaneous change in magnetic flux. This generates a current in the coil 201, which is rectified into direct current by a bridge rectifier and stored in the capacitor C, thus collecting the waste kinetic energy during the reciprocating motion of the piston 4. Based on the easy flow property of the magnetorheological fluid, a local magnetic field concentration phenomenon is rapidly generated during the movement of the piston 4, which has a significant advantage in terms of magnetic induction energy conversion efficiency compared to a single coil 201.

[0042] Verification of the above-mentioned piston motion waste energy mixing and collection device based on magnetorheological fluid: The magnetorheological fluid used in the manufacture of the collection device is MRF-J25T, purchased from Chongqing Materials Research Institute Co., Ltd., with a density of 2.65 g / cm³. 3 The zero-field viscosity (T=10 / s, 20℃) is 0.8 Pa·s, and the shear stress (5000Gs) is >50 kPa. The manufacturing difference lies in the collection device of the non-magnetic rheological liquid 3, which serves as a comparative example. An experimental vibration table drives the piston rod to move the piston. The calculated effective voltage RMS / V of the cylinder 1 under non-magnetic rheological liquid conditions at piston movement frequencies of 1.88 Hz, 1.56 Hz, 1.25 Hz, and 0.94 Hz are compared, and the results are shown in the table below.

[0043] Piston motion frequency / Hz Comparative voltage RMS / V Example voltage RMS / V 1.88 0.1550 0.1674 1.56 0.1260 0.1367 1.25 0.1021 0.1117 0.94 0.0765 0.0850

[0044] From the above table and Figure 3The verification results show that, compared with the magnetic induction energy conversion efficiency of a single coil 201, the effective value of the voltage output when magnetorheological liquid 3 is added to cylinder 1 is improved by 9.3%.

[0045] like Figure 4 As shown, in addition to recovering the waste kinetic energy generated during the reciprocating motion of piston 4, this invention can utilize the vibration generated during the operation of the cylinder 1 to force the magnetorheological fluid 3 to periodically sway back and forth in the liquid cavity. The ferromagnetic particles affected by the magnetic force of piston 4 are arranged with the same pole in the magnetorheological fluid. The periodic swaying of the magnetorheological fluid 3 causes a change in the magnetic flux of coil 201, thereby generating current in coil 201 to achieve the purpose of energy conversion. The current is rectified into DC by a bridge rectifier and stored in capacitor C, thus realizing the collection of waste vibration kinetic energy generated during the operation of cylinder 1.

[0046] The above two principles are combined to achieve mixed collection of waste energy from piston movement, which can effectively solve the waste of energy from the reciprocating motion of piston 4 and the vibration generated during equipment operation. This energy can be used to power the micro-electrical devices 5 on related equipment, which helps to reduce energy consumption and improve resource utilization.

[0047] The detailed descriptions listed above are merely specific illustrations of feasible embodiments of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent embodiments or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A piston-motion waste energy mixing and collection device based on magnetorheological fluid, characterized in that, The device includes a cylinder (1) and an energy storage circuit (2). The cylinder (1) includes a magnetorheological fluid chamber (101) and a piston chamber (102). The magnetorheological fluid chamber (101) contains a magnetorheological fluid (3) that can slosh. The energy storage circuit (2) includes a coil (201) wound around the magnetorheological fluid chamber (101) and an energy storage element electrically connected to the coil (201). When the magnetorheological fluid (3) sloshes, it can cover the winding position of the coil (201). The piston chamber (102) contains a... A piston (4) capable of moving through a coil (201) and possessing magnetism; the piston chamber (102) is located within the magnetorheological fluid chamber (101). When the piston (4) moves within the piston chamber (102) and the cylinder (1) vibrates, based on the easy flow property of the magnetorheological fluid, a local magnetic field concentration phenomenon is generated during the movement of the piston (4), which enables the magnetorheological fluid (3) to be magnetized within the magnetorheological fluid chamber (101) and periodically shakes, causing a change in the magnetic flux of the coil (201).

2. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 1, characterized in that, The magnetorheological fluid cavity (101) can cover the winding position of the coil (201).

3. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 1, characterized in that, The energy storage circuit (2) includes a rectifier electrically connected to the coil (201) and the energy storage element.

4. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 3, characterized in that, The rectifier is a bridge rectifier consisting of multiple rectifier diodes connected in a bridge configuration.

5. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 3, characterized in that, The energy storage element is a capacitor.

6. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 1, characterized in that, The energy storage circuit (2) is connected to a micro-electrical device (5).

7. The piston motion waste energy mixing and collection device based on magnetorheological fluid according to claim 1, characterized in that, The piston (4) is connected to a piston rod (401) that extends out of the cylinder (1).

8. A method for collecting waste energy from piston motion based on magnetorheological fluid, characterized in that, The method includes: based on the piston motion waste energy mixing and collection device based on magnetorheological fluid according to any one of claims 1 to 7, when the piston (4) moves in the piston chamber (102) and the cylinder (1) vibrates, the magnetorheological fluid (3) is magnetized in the magnetorheological fluid chamber (101) and periodically shakes, causing the magnetic flux of the coil (201) to change, generating current in the coil (201) and storing energy in the energy storage element.

9. The method for collecting waste energy from piston motion based on magnetorheological fluid according to claim 8, characterized in that, The current generated in the coil (201) is rectified into DC and stored in the energy storage element.

10. The method for collecting waste energy from piston motion based on magnetorheological fluid according to claim 8, characterized in that, The energy storage circuit (2) is used to supply power to the micro-device (5).

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