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CN-122014486-A - Wave energy induction heating device

CN122014486ACN 122014486 ACN122014486 ACN 122014486ACN-122014486-A

Abstract

The invention discloses a wave energy induction heating device, which belongs to the technical field of ocean renewable energy utilization and energy conversion, and comprises a seabed fixed base and a sealing cavity, wherein a fixed shaft extending in the vertical direction is fixed at the upper end of the seabed fixed base, the top end of the fixed shaft stretches into the sealing cavity and is fixed, a main transmission shaft is sleeved outside the fixed shaft, a float assembly is fixed at the lower end of the main transmission shaft, the float assembly drives the main transmission shaft to do lifting and rotating compound motion under the action of sea waves, an induction heating assembly comprising a permanent magnet assembly and a copper sleeve is arranged in the sealing cavity of the sealing cavity, the copper sleeve is fixed in the sealing cavity, the permanent magnet assembly is fixed at the upper end of the main transmission shaft and is positioned at the inner side of the copper sleeve, a gap is reserved between the permanent magnet assembly and the copper sleeve, and when the permanent magnet assembly does lifting and rotating compound motion along with the main transmission shaft, vortex heating the copper sleeve is formed in the copper sleeve, and pure water in the sealing cavity and contacted with the copper sleeve is heated. The device has a simple structure and is suitable for converting wave energy into heat energy in a marine environment.

Inventors

  • ZHANG WENFENG
  • LIN SHIYA

Assignees

  • 南京邮电大学

Dates

Publication Date
20260512
Application Date
20260319

Claims (10)

  1. 1. The wave energy induction heating device is characterized by comprising a seabed fixed base (12), wherein a fixed shaft (11) extending in the vertical direction is fixed at the upper end of the seabed fixed base (12), a sealing cavity (1) is fixed at the top end of the fixed shaft (11), a main transmission shaft (8) is coaxially arranged at the outer side of the fixed shaft (11), the lower end of the main transmission shaft (8) is connected with a float assembly, and the float assembly drives the main transmission shaft (8) to rotate and move up and down under the action of sea waves; The induction heating device comprises a sealing cavity (1), wherein an induction heating assembly is arranged inside the sealing cavity and comprises a permanent magnet assembly (13) and a copper sleeve (14), the copper sleeve (14) is fixed in the sealing cavity, the permanent magnet assembly (13) and the copper sleeve (14) are coaxially arranged, an air gap exists between the permanent magnet assembly and the copper sleeve, and when the permanent magnet assembly (13) rotates and moves up and down along with a main transmission shaft (8), eddy currents are induced in the copper sleeve (14), and Joule heat is generated in the copper sleeve (14) by the eddy currents, so that water or a heat conducting medium in the sealing cavity (1) is heated.
  2. 2. A wave energy induction heating device according to claim 1, characterized in that the float assembly comprises a float connection flange (7) fixed at the lower end of a fixed shaft (11), wherein a plurality of floats (6) are uniformly arranged in the circumferential direction of the float connection flange (7), and the floats (6) are fixed with the float connection flange (7) through corresponding float connection arms (5).
  3. 3.A wave energy induction heating apparatus according to claim 1, characterized in that the main drive shaft (8) is of hollow shaft construction, the main drive shaft (8) being in sliding and rotating engagement with the stationary shaft (11) via a first oil-free bushing (16) arranged between the main drive shaft (8) and the stationary shaft (11), so that the main drive shaft (8) can move up and down in a vertical direction with respect to the stationary shaft (11) and rotate around the stationary shaft (11).
  4. 4. A wave energy induction heating apparatus according to claim 1, characterized in that a limit ring (15) is arranged on the main transmission shaft (8), and the limit ring (15) is located below the permanent magnet assembly (13) and is used for supporting and limiting the permanent magnet assembly (13).
  5. 5. The wave energy induction heating device according to claim 1, wherein the side wall of the sealing cavity (1) is provided with a water inlet pipe (2) and a water outlet pipe (3) which are communicated with the inner sealing cavity.
  6. 6. The wave energy induction heating device according to claim 1, characterized in that the bottom of the sealing cavity (1) is provided with an end cover (4), the end cover (4) is provided with a bushing mounting seat hole (9), and a second oil-free bushing (10) and an axial rotary sealing ring (17) are arranged in the bushing mounting seat hole (9); the second oil-free bushing (10) is a cylindrical sliding bushing, the outer circle of the second oil-free bushing is fixedly connected with the bushing mounting seat hole (9), and the inner circle of the second oil-free bushing is in sliding fit with the outer round surface of the main transmission shaft (8); the axial rotary sealing ring (17) is arranged in an annular groove on the inner wall of the bushing mounting seat hole (9), and the inner side of the axial rotary sealing ring is attached to the main transmission shaft (8) and is used for carrying out rotary sealing on the heating cavity.
  7. 7. A wave energy induction heating apparatus according to claim 6, characterized in that the end cap (4) is screw-fitted with the sealing chamber (1) and sealed with a sealing gasket, such that a sealed housing structure is formed between the end cap (4) and the sealing chamber (1).
  8. 8. The wave energy induction heating device according to claim 1, wherein the permanent magnet assembly (13) comprises permanent magnets (131), magnetic yokes (132) and non-magnetic-conductive partition plates (133), the permanent magnets (131) are of a segmented multipole structure in the circumferential direction and are arranged in halbach according to a magnetizing mode, the permanent magnets (131) are of a layered structure in the axial direction, the permanent magnets are separated by the non-magnetic-conductive partition plates (133), and the magnetizing directions of two adjacent layers of permanent magnets are opposite; the permanent magnet assembly (13) is coaxially fixed at the top end of the main transmission shaft (8) and ascends and descends along with the main transmission shaft (8), the copper sleeve (14) is of a cylindrical structure, is coaxially coated on the outer side of the permanent magnet assembly (13), and forms an air gap with the permanent magnet assembly (13).
  9. 9. The wave energy induction heating device according to claim 8, wherein the sealing cavity (1), the main transmission shaft (8), the fixed shaft (11) and the seabed fixed base (12) are made of corrosion-resistant metal materials, the copper sleeve (14) is made of copper or copper alloy materials, the permanent magnet (131) is made of high-resistance Wen iron boron materials, the magnetic yoke (132) is made of high-conductivity magnetic steel materials, and the non-magnetic-conductive partition plate (133) is made of non-magnetic-conductive stainless steel materials.
  10. 10. Use of a wave energy induction heating apparatus according to any one of claims 1-9 for wave energy heat conversion.

Description

Wave energy induction heating device Technical Field The invention belongs to the technical field of ocean renewable energy source utilization and energy conversion, and particularly relates to a wave energy induction heating device. Background The wave energy is used as an important component of ocean renewable energy sources, and has the characteristics of high energy density, wide distribution range, strong sustainability and the like. The existing wave energy utilization technology mostly aims at electric energy output, mechanical energy is converted into electric energy through a wave driving mechanical structure, and an electric power conversion and grid connection system is arranged in a matched mode. The technical route system has a complex structure, has higher requirements on the running stability of the device and the access condition of the power grid, and is easy to influence the stable running of the power grid under the working condition of larger wave energy fluctuation. In practical engineering applications, the energy demand of some marine equipment and facilities is not dominated by the form of electrical energy, but rather by the form of thermal energy, such as sea water heating, offshore platform heating, ocean energy storage and related heat utilization systems. Meanwhile, in an application scene aiming at power generation, if wave energy is directly converted into electric energy, the wave energy is influenced by wave instability, and power fluctuation easily occurs in the power generation process, so that the stable utilization of subsequent electric energy is not facilitated. The permanent magnet eddy current heating technology can directly generate eddy current and release heat through magnetic field change in a conductor, so that mechanical motion is directly converted into heat energy, and a feasible way is provided for direct heat utilization of wave energy and intermediate stabilization of energy forms. By converting wave energy first into thermal energy and storing or conditioning it is possible to provide a more stable energy input for the subsequent energy utilisation process. However, when the permanent magnet eddy current heating structure is applied to the wave energy device, a plurality of technical problems still exist, namely, the motion form of the device is complex under the action of waves, usually, the axial reciprocating motion and the rotary motion are contained simultaneously, the composite motion is still required to be reasonably designed to be effectively transmitted to the permanent magnet, and equipment in the marine environment needs to run for a long time, so that the requirements on structural tightness and reliability of moving parts are high. Therefore, it is necessary to provide an induction heating type wave energy and heat energy conversion device which has a reasonable structure and a clear motion relationship and is suitable for marine environments, so that the direct conversion of wave energy into heat energy is realized, and the generated heat energy can be utilized by a subsequent energy conversion device for power generation or other utilization scenes. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a wave energy induction heating device which solves the problems in the prior art. The aim of the invention can be achieved by the following technical scheme: A wave energy induction heating device comprises a seabed fixed base, wherein a fixed shaft extending in the vertical direction is fixed at the upper end of the seabed fixed base, a sealing cavity is fixed at the top end of the fixed shaft, and a main transmission shaft is coaxially arranged at the outer side of the fixed shaft; The inner part of the sealing cavity is provided with an induction heating assembly comprising a permanent magnet assembly and a copper sleeve, the copper sleeve is fixed in the sealing cavity, the permanent magnet assembly and the copper sleeve are coaxially arranged, an air gap exists between the permanent magnet assembly and the copper sleeve, and when the permanent magnet assembly rotates and moves up and down along with the main transmission shaft, eddy currents are induced in the copper sleeve, and the eddy currents generate Joule heat in the copper sleeve, so that water or a heat conducting medium in the sealing cavity is heated. Further, the float assembly comprises a float connecting flange fixed at the lower end of the fixed shaft, a plurality of floats are uniformly arranged on the periphery of the float connecting flange, and the floats are fixed with the float connecting flange through corresponding float connecting arms. Further, the main transmission shaft is of a hollow shaft structure, and forms sliding and rotating fit with the fixed shaft through a first oil-free bushing arranged between the main transmission shaft and the fixed shaft, so that the main transmission shaft can move up and down along the v