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A phase modulator and thermoacoustic system

A technology of phase modulator and regulating cavity, which is applied in the direction of superheater, machine/engine, lighting and heating equipment, etc. It can solve the problems that cannot meet the requirements of large stiffness and large displacement of high-power system at the same time, and achieve flexible stiffness adjustment capability , to meet the effect of phase modulation requirements

Active Publication Date: 2020-12-11
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides a phase modulator and a thermoacoustic system, which is used to solve the defect that the prior art cannot meet the requirements of large stiffness and large displacement in a high-power system at the same time, so that the phase modulator can obtain sufficient stiffness and sufficiently large axial displacement of the piston to meet the phase modulation requirements of the thermoacoustic system

Method used

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  • A phase modulator and thermoacoustic system
  • A phase modulator and thermoacoustic system
  • A phase modulator and thermoacoustic system

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In the phase modulator described in the first embodiment, as figure 2 As shown, the connection base includes a base body 1 and a bearing hole 6 . The interior of the bearing hole 6 is hollow, and it is fixed on the base body 1 through. Bearing holes 6 protrude outward from the two sides of the seat body 1 respectively. The piston shaft 7 is movably sleeved in the bearing hole 6 . Then leave a space between each piston 4,5 and the bearing hole 6, seal a certain volume of gas in the space between the piston 4,5 and the piston shaft 7 so that the space forms a sealed air cavity, then the piston 4 , 5, the airtight space (i.e. air cavity) enclosed by the piston shaft 7 and the bearing hole 6 can form a gas spring. The phase modulator utilizes the air cavity structure to provide sufficient spring stiffness for the phase modulator to ensure that the phase modulator achieves the required phase modulation effect.

[0036] In this embodiment, the phase modulator also includ...

Embodiment 2

[0042] The structure of the phase modulator described in the second embodiment is basically the same as that in the first embodiment, and the similarities will not be described again. The difference is that the phase modulator in this embodiment also includes a leaf spring 17 .

[0043] In this example, if image 3 As shown, leaf springs 17 are respectively installed in the air cavity of each gas spring. One end of the leaf spring 17 is connected with the pistons 4, 5, and the other end is connected with the hole wall of the bearing hole 6. That is, the outer edge of the leaf spring 17 is connected to the outer edge of the piston 4,5, and the inner edge of the leaf spring 17 is connected to the extended end of the bearing hole 6, so that the piston 4,5 and the bearing hole 6 are connected by the leaf spring 17. connect. Since the phase modulator will be placed flat when in use, the above-mentioned structure can be used to radially support the mover (that is, the pistons 4, 5...

Embodiment 3

[0046] The structure of the phase modulator described in the third embodiment is basically the same as that in the first embodiment, and the similarities will not be repeated. At the gap between the bearing hole 6 and the piston shaft 7 . The air bearing structure can increase the axial displacement of the phase modulator, so as to meet the phase modulation requirements in various environments.

[0047] In this example, if Figure 4 As shown, the air bearing structure includes a shaft cavity 9 , an air hole, a one-way valve 8 and an orifice 10 . A hollow shaft cavity 9 is provided inside the bearing hole 6 , air holes are respectively penetrated through the two pistons 4 , 5 , and each air hole communicates with the shaft cavity 9 through a one-way valve 8 respectively. Air holes are preferably respectively penetrated on the axes of the two pistons 4 and 5 , and a check valve 8 is installed at the connection between each air hole and the piston shaft 7 . It is also possible...

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Abstract

The invention relates to the technical field of thermoacoustic equipment, in particular to a phase modulator and a thermoacoustic system. According to the phase modulator, the two sides of a connecting base are connected with air cylinders used for being connected with thermoacoustic components; each air cylinder is internally provided with a piston; the two pistons are connected through a pistonshaft; the piston shaft movable penetrates through the connecting base; gas springs are arranged between the connecting base and the pistons correspondingly; and gas is sealed in a gas cavity of eachgas spring. The gas springs of the phase modulator are internally provided with the gas cavities which can serve as elastic elements, and thus the gas springs can provide elastic restoring force for axial displacement of the pistons during phase modulation of the phase modulator; and the gas cavities of the gas springs have flexible rigidity and supporting adjusting capability, thus, the phase modulator can have sufficient rigidity and sufficient axial displacement of the pistons during phase modulation, and consequently the phase modulator can meet the phase modulation requirements of the high-power thermoacoustic system.

Description

technical field [0001] The invention relates to the technical field of thermoacoustic equipment, in particular to a phase modulator and a thermoacoustic system. Background technique [0002] A thermoacoustic system is a technology that realizes energy conversion between heat energy and sound waves (sound waves are a type of mechanical energy). In order to obtain the ideal conversion efficiency, the key components in the thermoacoustic system (mainly the regenerator) must obtain a specific phase relationship of the sound field, so the phase modulator is an essential component in the thermoacoustic system. The two ends of the phase modulator are respectively connected to different thermoacoustic system components, and different acoustic impedances are realized at both ends of the phase modulator. The general acoustic phase modulator mainly uses sound capacity, acoustic sense, resonance tube, etc. for phase modulation, while the mechanical phase tuner mainly uses a resonant sy...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B23/00F25B40/06F03G7/00
CPCF03G7/00F25B23/00F25B40/06
Inventor 胡剑英罗二仓张丽敏陈燕燕孙岩雷
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI