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Free piston type Stirling machine

A piston-type machine technology, applied in the field of free-piston Stirling machines, can solve the problems of difficult breakthrough in single machine capacity and high cost, and achieve the effects of large amplitude, reduced requirements, and high frequency

Inactive Publication Date: 2015-09-09
GUANGXI FAXIAN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the gradual maturity of the free-piston Stirling technology, using the known structure, trying to further increase the power density faces a bottleneck: In order to prevent the leaf spring from breaking beyond the allowable stress, it is typically necessary to use precious metal beryllium to make a lightweight excluder, at a cost High, and the capacity of a single machine is difficult to break through tens of kilowatts

Method used

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  • Free piston type Stirling machine
  • Free piston type Stirling machine
  • Free piston type Stirling machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as image 3 As shown, the free-piston Stirling machine includes: power piston 16, ejector 12, back pressure chamber piston 24, cylinder block 5, ejector leaf spring 19, power piston leaf spring 18, linear reciprocating motor and steering drive motor Placed in the back pressure chamber 23. The permanent magnet mover 10 of the linear motor is fixed to the power piston rod 17 through the bracket 11 , and the fastener II 20 fastens the leaf spring 18 to the tail of the power piston rod 17 . The displacer piston rod 13 penetrates the power piston 16 coaxially. The thin rod 14 of the displacer piston passes through the power piston 16 and the power piston rod 17 coaxially, and there is a fastener I15 at one end close to the expansion chamber 21 to fasten the displacer 12, and the other end of the back pressure chamber 23 is fastened Displacer leaf spring 19 and back pressure chamber piston 24. The relative movement of the power piston 16 and the ejector 12 causes the ...

Embodiment 2

[0041] Such as Figure 4 As shown in the axial schematic diagram of the free-piston Stirling machine with three back pressure chambers, the free-piston Stirling machine includes: opposed power piston 16, ejector 12, back pressure chamber piston 24, cylinder block 5 , The second cylinder block 38, the ejector leaf spring 19, the power piston leaf spring 18, the linear reciprocating motor is placed in the back pressure chamber 23, the permanent magnet mover 10 is fixed to the power piston rod 17 through the rigid bracket 11, and the fastener I15 Fasten the power piston leaf spring 18 to the tail of the power piston rod 17 . The ejector piston rod 13 passes coaxially through a central hole 34 in the cylinder block 5 . The thin rod 14 of the displacer piston passes through the central hole 34 coaxially, and the displacer 12 is fastened by a fastener I15 at one end close to the expansion chamber 21, and the displacer leaf spring 19 and the back pressure chamber are fastened at the...

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Abstract

The invention relates to a free piston type Stirling machine, which aims to lower the design of an ejector plate spring and reduce the manufacturing difficulty of the free piston type Stirling machine, wherein two pistons with one big and one small are respectively fixed on two ends of an ejector piston rod; a liner reciprocating motor powered by a shifting-phase transformer is contained inside a back pressure chamber; the big piston fixed on the ejector piston rod is an ejector that is set inside an expansion chamber; the small piston and the ejector plate spring are fixed on the ejector piston rod located at the other end of the back pressure chamber; the small piston is set inside a cylinder opened on a shifting-phase driving motor mover; and the liner reciprocating motor driven by a power piston is in electric connection to the shifting-phase driving motor through the shifting-phase transformer. According to the invention, the working conditions of high frequency and large amplitude of an ejector can be realized with low manufacturing cost; the power density and the capacity of per unit of the free piston type Stirling machine are improved; and the machine provided herein can all be applied to Stirling motors and refrigerating machines.

Description

technical field [0001] The invention relates to thermal power technology, in particular to a free-piston Stirling machine for power generation, refrigeration and other purposes based on the Stirling cycle. Background technique [0002] The Stirling device is based on the Stirling cycle, which is divided into two categories according to the purpose: the Stirling engine that uses the forward Stirling cycle, the working gas in the device absorbs heat and expands at high temperature, and releases heat and compresses at room temperature The obtained expansion work is greater than the compression work, thereby converting heat energy into mechanical energy, and its theoretical efficiency is equal to the efficiency of the Carnot cycle; the reverse Stirling cycle is called a Stirling refrigerator, and the device needs to consume mechanical energy to realize the working gas at room temperature. Exothermic compression, endothermic expansion at low temperature produces a cooling effect,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02G1/044F02G1/053
CPCF02G1/044F02G1/053
Inventor 胡兴华雷勇飞
Owner GUANGXI FAXIAN TECH