CN102052301A - N-stage scroll compressor - Google Patents

Abstract

The invention discloses an N-level scroll compressor (N is a natural number), and belongs to the technical field of mechanical equipment design theories. The scroll compressor mainly comprises a dynamic scroll, a static scroll, a cross ring and an eccentric shaft. After the dynamic scroll and the static scroll which have the same scroll line parameter, phase difference phi and base circle center distance r are assembled, a plurality of pairs of closed N-level crescent accommodating cavities can be formed; and when the center (base circle center) of the dynamic scroll performs circular orbit movement with radius r around the center (base circle center) of the static scroll, the closed N-level accommodating cavity number is increased or reduced to fulfill the purposes of suction, compression and exhaust of gas. First-level compression, second-level compression, third-level compression, fourth-level compression...N-level compression work simultaneously, the low-pressure gas enters the air suction cavity from the peripheral gaps of the dynamic scroll and the static scroll, and the compressed gas is exhausted at an exhaust hole in the center of the static scroll. The scroll compressor has the characteristics of simple structure, small volume, high volume utilization rate and compression ratio, stable operation, low noise and the like. The scroll compressor can be widely applied in air-conditioning equipment and refrigerating units.

Description

A kind of N level scroll compressor

Technical field

The present invention is specifically related to a kind of N level scroll compressor, 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 N level scroll compressor is provided, N is a natural number, and 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: a kind of N level of the present invention scroll compressor mainly comprises: movable orbiting scroll, quiet whirlpool dish, partition ring, eccentric shaft.A kind of working principle of N level scroll compressor:, 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 N level 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 has this to realize the purpose of suction, compression and the exhaust of gas.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:

This N stage compressor compression process be divided into first order compression, second level compression, third level compression, fourth stage compression ..., N part of N level 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, when the N level was compressed, compression ratio increased again, reaches the high compression effect at last.Thereby make this N level scroll compressor have higher capacity utilization and compression ratio than single-stage scroll compressor and present two stage compressor.

2. this N level scroll compressor does not need lubricant oil and relevant lubricating element, and is simple in structure, so operation is more steady, noise is low, and frictional force is less.

3 compare present two stage compressor, and this N 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 N level scroll compressor, the scroll compressor when the present invention uses special case N=6 mainly comprises: movable orbiting scroll, quiet whirlpool dish, partition ring, eccentric shaft.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), N level compression (6) height hN (h＜hN-1), 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 N level 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 has this to realize the suction of gas, 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 (A) center, quiet whirlpool after compression.Scroll wrap be meshing with each other form several to a dynamic compression chamber continuously.

A kind of N level scroll compressor, it is characterized in that, first order compression (1), second level compression (2), third level compression (3), fourth stage compression (4) ..., N level compression (6) works simultaneously, first order compression chamber volume is greater than second level compression chamber volume, second level compression chamber volume knows thus that greater than the third level compression chamber volume previous stage compression chamber volume is greater than back one-level compression chamber volume, 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

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

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＞...＞the N level vortex body height hN.

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

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

Claims (4)

1. N level scroll compressor, N is a natural number, 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 the N level crescent shape volume compression chamber 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 N level scroll compressor 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) ..., N level compression (6) works simultaneously, from first order compression air-breathing after progressively compression, discharge gas medium to N level compression place exhaust port.

3. a kind of N level scroll compressor 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 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

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

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＞...＞the N level vortex body height hN.By the volume ratio formula:

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

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

4. a kind of N level scroll compressor according to claim 1 is characterized in that: movable orbiting scroll (N), quiet whirlpool dish (A) be meshing with each other form several to the continuous dynamic compression chamber of N level.

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