External-excitation multi-stage oscillation jet flow gas wave refrigerator

Abstract

The invention discloses an external-excitation multi-stage oscillation jet flow gas wave refrigerator. The external-excitation multi-stage oscillation jet flow gas wave refrigerator adopts a structure for halving a main jet flow passage by multiple times; excitation microstreams which switch time sequences through external modulation are used for exciting a main jet flow to successively generate multi-order mural switching oscillation; the main jet flow is sequentially distributed into multiple receiving tubes so as to achieve refrigeration. The external-excitation multi-stage oscillation jet flow gas wave refrigerator overcomes mechanism defects of an original single-tube or multi-tube static gas wave refrigerator, can greatly improve the refrigerating efficiency, also eliminates inherent defects that self-excited oscillation is large in jet energy loss, difficult in start-up and difficult to adjust oscillation frequency and the like, and has the advantages of small energy loss, easy start-up, adjustability of oscillation frequency, load matching and the like; the external-excitation multi-stage oscillation jet flow gas wave refrigerator can be applied to a scattered pressure energy utilization occasion and high-pressure and bad occasions, and has the effects of high pressure energy conversion efficiency, free maintenance, reliable operation and the like.

Description

technical field [0001] The invention discloses an externally excited multistage oscillating jet gas wave refrigerator, which belongs to the technical field of fluid jet oscillation and expansion refrigeration. Background technique [0002] With the improvement of social productivity and the sustainable development of society, the demand for simple, efficient and maintenance-free fluid equipment is also increasing, so many new fluid machinery and equipment have emerged. Among them, the static gas wave refrigerator directly expands and refrigerates the pressurized gas, which has the characteristics of simple structure, no wear, maintenance free, high pressure resistance, etc., and can produce great economic and social benefits in terms of utilizing residual pressure and pressure energy. . For example, Chinese patents ZL 200410021388.X and ZL 200610045931.9 have been applied to occasions such as expansion and refrigeration using the pressure energy of oilfield gas itself. [...

AI Technical Summary

Problems solved by technology

[0003] However, there are still many deficiencies in the current static gas wave refrigerators. Because they all use the jet flow itself to divide the excitation and generate swinging wall oscillations to distribute the jet flow into the receiving tubes arranged in a fan plane to achieve cooling, which will lead to The following three inherent defects: First, the strength of self-excitation is small, and it is not easy to generate oscillation

Second, the oscillation frequency of the jet is difficult to adjust online, and it is difficult to adjust and match the dynamic load, which significantly reduces the cooling efficiency

The third is that the energy loss of the jet is large. This is because a sufficiently large area of ​​the excitation port must be set on the side wall of the main jet flow channel. In addition to the shunt loss, a strong turbulent vortex will also be generated, resulting in a large amount of kinetic energy of the working jet. consume

This time interval, that is, the difference in the jet cycle, will seriously deteriorate the cycle process in the air wave tube and reduce the cooling efficiency

Images