CN102052304A - Six-stage scroll compressor - Google Patents

Abstract

The invention provides a six-stage scroll compressor, belonging to the technical field of design theory of mechanical equipment. The scroll compressor mainly comprises an orbiting scroll, a fixed scroll, cross rings and an eccentric shaft. The scroll compressor is characterized in that after the orbiting scroll and the fixed scroll are assembled, a plurality of pairs of closed six-stage crescent volume cavities can be formed, wherein the orbiting scroll and the fixed scroll have the same scroll profile parameters, the phase difference between the orbiting scroll and the fixed scroll is pi, and the distance between the center of the base circle of the orbiting scroll and the center of the base circle of the fixed scroll is r; when the center (center of the base circle) of the orbiting scroll moves along the circular orbit with a radius r around the center (center of the base circle) of the fixed scroll, the closed volume cavities correspondingly expand or shrink, thus realizing the aims of absorbing, compressing and exhausting gases; and when a first-stage compression cavity, a second-stage compression cavity, a third-stage compression cavity, a fourth-stage compression cavity, a fifth-stage compression cavity and a sixth-stage compression cavity work at the same time, the low-pressure gases enter a gas absorption cavity from gaps on the peripheries of the orbiting scroll and the fixed scroll and are exhausted from an exhaust hole in the center of the fixed scroll after being compressed. The scroll compressor has the characteristics of simple structure, small volume, high volume utilization rate and compression ratio, steady operation, low noise and the like. The scroll compressor can be widely applied to air-conditioning equipment and refrigerating units.

Description

A kind of six grades of scroll compressors

Technical field

The present invention is specifically related to a kind of six grades of scroll compressors, belongs to machinery design theory technical field.

Background technique

Scroll compressor is a kind of precision optical machinery of compressing and freezing of being used to, it has a series of advantages such as simple and compact for structure, energy-efficient, microseism low noise and reliability height, makes scroll compressor in the application of refrigeration and field of air conditioning development at full speed be arranged.Nowadays, scroll compressor has been widely used in the air-conditioning and refrigeration unit of middle and small scale.But prior art is mainly U.S., monopolizes day, and therefore, it is imperative to carry out the scroll compressor that has China's independent intellectual property right.

Superiority such as parts are few, noise is low though traditional single-stage scroll compressor has, low vibration, high efficiency, for more and more higher present of performance requirement, its compression ratio far can not reach requirement.

Existing two-stage scroll compressor, as patent No. No.5,304,047 U. S. Patent.This traditional two-stage scroll compressor has first, second and the 3rd scroll.There is a choma (Spiral Ridge) respectively in the second and the 3rd scroll, and first scroll has two chomas on opposite both sides.The second and the 3rd scroll is installed in the bi-side of first scroll, and choma and first scroll of the second and the 3rd scroll by correspondence intermeshed and constituted the compression that compression chamber is realized gas medium.The compression chamber that first scroll and second scroll form is low compression stage, and the compression chamber that the first and the 3rd scroll forms is the high compression level.And for example the patent No. is the European patent of No.1293676, comprise first order compressor and high stage compressor, first order compressor drives by first order driving source, high stage compressor drives by second level driving source, and the through hole of the through hole of the relief opening of first order compressor and the relief opening of second level compression stage links to each other and pools the through hole of total relief opening.The major defect of existing two-stage scroll compressor is: structure is complicated, and volume is big, and it is steady inadequately to move, and noise is big etc.

Summary of the invention

The objective of the invention is to overcome the deficiency of traditional single stage, existing two stage compressor, a kind of six grades of scroll compressors are provided, it is little that it has a volume, simple in structure operating steadily, low noise, characteristics such as high compression efficiency and high compression ratio.

The present invention adopts following technical proposals to realize: six grades of scroll compressors of a kind of high compression ratio of the present invention mainly comprise: upper end cap, lower end cap, movable orbiting scroll, quiet whirlpool dish, partition ring, eccentric shaft, support.A kind of working principle of six grades of scroll compressors of high compression ratio:, phase difference π identical, basic circle center the scroll molded line parameter at a distance of the movable orbiting scroll of r (value of r is relevant with involute pitch and wall thickness) and quiet whirlpool coil assemble after, can form several six grades of crescent shape cavity volumes to sealing, when movable orbiting scroll center (referring to the basic circle center) is circular orbit when motion of r as radius around quiet whirlpool disk center (referring to the basic circle center), the cavity volume of these sealings enlarges accordingly or dwindles, and realizes the purpose of suction, compression and the exhaust of gas thus.Low-pressure gas enters air aspiration cavity from the peripheral slit of movable orbiting scroll, quiet whirlpool dish, is discharged by the vent ports at disk center place, quiet whirlpool after compression.

After the present invention adopts technique scheme, mainly contain following beneficial effect:

1. these six stage compressor compression processes are divided into first order compression, second level compression, third level compression, fourth stage compression, level V compression and six parts of the 6th grade of compression.First order compression is air-breathing and through the row compression from the external world, when being compressed to the second level, the first order compression chamber volume rapid drawdown because second level compression chamber volume is compared, make the gas medium compression ratio increase rapidly, compression successively, during at last to the 6th grade of compression, compression ratio increases again, reaches the high compression effect.Thereby make these six grades of scroll compressors have higher capacity utilization and compression ratio than single-stage scroll compressor and present two stage compressor.

2. these six grades of scroll compressors do not need lubricant oil and relevant lubricating element, and are simple in structure, so operation is more steady, noise is low, and frictional force is less.

3 compare present two stage compressor, and this six stage compressor does not need component such as two or more sound whirlpool dish, and structure is simpler, and compression effectiveness is better.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples

Fig. 1 is a transverse cross-sectional view of the present invention

Fig. 2 is an axial section of the present invention

Among the figure: the dish of the quiet whirlpool of A, the B movable orbiting scroll, C cross, D eccentric shaft, CH1 23456789 10 11 12 13 14 15 16 1,718 19 20 21 22 23 compression chambers, the compression of 1 first order, the compression of 2 second level, the compression of 3 third level, the compression of 4 fourth stages, the compression of 5 level Vs, 6 the 6th grades of compressions, 7 exhaust ports.

Embodiment

Below in conjunction with embodiment, further specify the present invention.

Embodiment 1

Shown in Figure of description 1, a kind of six grades of scroll compressors mainly comprise: movable orbiting scroll (B), quiet whirlpool dish (A), partition ring (C), eccentric shaft (D).It is characterized in that: movable orbiting scroll (B), quiet whirlpool dish (A) structure is shown in Figure of description, if ordinary single-stage scroll molded line height is h1, the height of first order compression (1) also is h1 among Fig. 4, second level compression (2) highly is h2 (h2＜h1), third level compression (3) height h3 (h3＜h2), fourth stage compression (4) height h4 (h4＜h3), level V compression (5) height h5 (h5＜h4), the 6th grade of compression (6) height h6 (h6＜h5), movable orbiting scroll (B), quiet whirlpool dish (A) is meshing with each other, working principle is same as the single stage compressor working principle: identical the scroll molded line parameter, phase difference π, the basic circle center is after the movable orbiting scroll (B) of r (value of r is relevant with involute pitch and wall thickness) is assembled with quiet whirlpool dish (A), can form several six grades of crescent shape cavity volumes to sealing, CH1 23456789 10 11 12 13 14 15 16 17 18 19 20 21 2223 grades all are volume compression chambers in the accompanying drawing, when movable orbiting scroll (B) center (referring to the basic circle center) is the circular orbit motion of r around dish (A) center, quiet whirlpool (referring to the basic circle center) as radius, the cavity volume of these sealings enlarges accordingly or dwindles, and realizes the suction of gas thus, the purpose of compression and exhaust.Low-pressure gas enters air aspiration cavity from the peripheral slit of the quiet whirlpool dish of movable orbiting scroll (B) (A), is discharged by the vent ports (7) of dish (B) center, quiet whirlpool after compression.Scroll wrap be meshing with each other form several to a dynamic compression chamber continuously.

A kind of six grades of scroll compressors, it is characterized in that: first order compression (1), second level compression (2), third level compression (3), fourth stage compression (4), level V compression (5), the 6th grade of compression (6) are worked simultaneously, first order compression chamber volume is greater than second level compression chamber volume, second level compression chamber volume is greater than third level compression chamber volume, know thus, previous stage compression chamber volume is greater than back one-level compression chamber volume, and volume ratio is greater than the single stage compressor volume ratio, and it is according to being:

$\mathrm{Vs}=\mathrm{\πP}(P-2t)h_1(2n-1-\frac{\mathrm{\θs}}{180})$

θs＝[n-int(n)]×360

$\mathrm{Ve}=\mathrm{\πP}(P-2t)h_6(3-\frac{{\mathrm{\θ}}^{*}}{\mathrm{\π}})$

P＝2πr

Annotate: Vs is an aspirated volume; Ve is a delivery space; N is the vortex number of turns; Int (n) is the n bracket function; θ ^*Be the exhaust angle; R is a Base radius.

Vortex body height with one-level is the same, first order vortex body height h1＞second level vortex body height h2＞third level vortex body height h3＞fourth stage vortex body height h4＞level V vortex body height h5＞the 6th grade of vortex body height h6.

$v^{\′}=\frac{\mathrm{Vs}}{\mathrm{Ve}}=\frac{(2n-1-\mathrm{\θs}/\mathrm{\π})}{(3-{\mathrm{\θ}}^{*}/\mathrm{\π})}\×\frac{h_1}{h_6}>\frac{(2n-1-\mathrm{\θs}/\mathrm{\π})}{(3-{\mathrm{\θ}}^{*}/\mathrm{\π})}=v$

Annotate: v ' is a kind of compression ratio of six grades of scroll compressors; V ordinary single-stage minimum cylinder volume ratio; Volume ratio is also greater than two stage compressor volume ratio at present when h1/h6＞2, and structure is simpler.

Claims (4)

1. six grades of scroll compressors, mainly comprise: movable orbiting scroll (B), quiet whirlpool dish (A), partition ring (C), eccentric shaft (D), it is characterized in that:, phase difference π identical the scroll molded line parameter, basic circle center are after the movable orbiting scroll (B) of r and quiet whirlpool dish (A) assembling, can form six grades of crescent shape volume compression chambers of sealing, low-pressure gas enters air aspiration cavity from the peripheral slit of the quiet whirlpool dish of movable orbiting scroll (B) (A), is discharged by the vent ports (7) of dish (B) center, quiet whirlpool after compression.

2. a kind of six grades of scroll compressors according to claim 1, it is characterized in that: first order compression (1), second level compression (2), third level compression (3), fourth stage compression (4), level V compression (5), the 6th grade of compression (6) are worked simultaneously, from first order compression air-breathing after progressively compression, discharge gas medium to the 6th grade of compression place exhaust port.

3. a kind of six grades of scroll compressors according to claim 1, it is characterized in that: first order compression chamber volume is greater than second level compression chamber volume, second level compression chamber volume is greater than third level compression chamber volume, know thus, previous stage compression chamber volume is greater than back one-level compression chamber volume, volume ratio is worked energetically the single stage compressor volume ratio, and it is according to being:

$\mathrm{Vs}=\mathrm{\πP}(P-2t)h_1(2n-1-\frac{\mathrm{\θs}}{180})$

θs＝[n-int(n)]×360

$\mathrm{Ve}=\mathrm{\πP}(P-2t)h_6(3-\frac{{\mathrm{\θ}}^{*}}{\mathrm{\π}})$

P＝2πr

Vortex body height with one-level is the same, first order vortex body height h1＞second level vortex body height h2＞third level vortex body height h3＞fourth stage vortex body height h4＞level V vortex body height h5＞the 6th grade of vortex body height h6.By the volume ratio formula:

$v^{\′}=\frac{\mathrm{Vs}}{\mathrm{Ve}}=\frac{(2n-1-\mathrm{\θs}/\mathrm{\π})}{(3-{\mathrm{\θ}}^{*}/\mathrm{\π})}\×\frac{h_1}{h_6}>\frac{(2n-1-\mathrm{\θs}/\mathrm{\π})}{(3-{\mathrm{\θ}}^{*}/\mathrm{\π})}=v$

Volume ratio is also greater than two stage compressor volume ratio at present when h1/h6＞2, and structure is simpler.

4. a kind of six grades of scroll compressors according to claim 1 is characterized in that: movable orbiting scroll (B), quiet whirlpool dish (A) be meshing with each other form several to six grades of continuous dynamic compression chambeies.

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