CN100359176C - Swirl fluid machinery - Google Patents

Abstract

The purpose of this invention is to prevent a motive power loss and noise in operation, while enhancing sealability of a compression space, by properly setting its angle, while enhancing strength of projections arranged in a lap part. The inner diameter side projection 13 and the outer diameter side projection 14 are respectively arranged on an inner peripheral surface 12A and an outer peripheral surface 12B of the lap part 12 of a revolving scroll 10, and these cross sections are formed in a substantially triangular shape. Thus, the projections 13 and 14 can enhance the strength by preventing stress concentration by concave circular arc surfaces 13B and 14B, and top parts 13A and 14A can easily become familiar by contacting with the lap part 3. An angle [alpha] formed by the adjacent projections 13 and 14 is set in a predetermined range. Thus, the sealability of the compression space 15 is enhanced, and workability of the lap part 12 and the projections 13 and 14 can be enhanced.

Description

Convolute-hydrodynamic mechanics

Technical field

The present invention relates to be fit to be applied to, for example, the convolute-hydrodynamic mechanics of air compressor, vacuum pump etc.

Background technique

The structure of general convolute-hydrodynamic mechanics comprises: fixing volute body; With this fixing relative and rotary vortex body of establishing of volute body.In addition, fixedly volute body and rotary vortex body have respectively: the end plates of circular plate type are rolled into spiral type from the radially inner side of these end plates to radial outside, and axially uprightly are arranged on the clinch on these end plates.Like this, fixedly volute body and rotary vortex body form a plurality of pressing chambers by overlapping mutual clinch.

And, convolute-hydrodynamic mechanics by live axle make rotary vortex body relative fixed volute body with etc. turning radius rotation, thus, can be from being located at the fixedly suction port suction gas of volute body radial outside, and in each pressing chamber, compress successively, discharge the gas of this compression by being located at the inboard exhaust port in fixing volute body footpath.

In addition, in the convolute-hydrodynamic mechanics, have by on the side face of each clinch, forming concavo-convex, with reduce between each clinch the gap, improve pressing chamber sealing, improve the structure (for example with reference to following patent documentation 1, non-patent literature 1) of compression efficiency.

[patent documentation 1] spy opens flat 5-141379 communique;

The open skill of [non-patent literature 1] invention association is reported 2001-1746 number.

Use the convolute-hydrodynamic mechanics of prior art, on the side face of the fixing clinch of volute body, rotary vortex body, form many projections (groove) of extension vertically; And this projection is in the scrollwork direction of clinch, promptly spreads all over from the radially inner side to the radial outside with about equally gap to form.

Use the convolute-hydrodynamic mechanics of above-mentioned prior art owing on the side face of clinch, form many projections (groove) of extending vertically, thus few from the compressed fluid that spills between the relative clinch, and the sealing of raising pressing chamber.

But the projection of application prior art because its cross section is a square, so front end forms the broad amplitude, therefore, when projection contacts the clinch of opposite side, takes place to cause power loss big by surface friction drag, sends problems such as big noise, snap-in.

In addition, because spread all over radially inner side from clinch to radial outside uniformly-spaced to form each projection, think is in the radially inner side seal compression chamber that the radius of curvature of clinch reduces, and the interval of each projection is just excessive, can cause spilling the problem that compression efficiency descends because of compressed fluid.

And then, when volute body rotates, if the angle of setting between each projection all equates, many projections will be with the most approaching relative side face of the roughly the same time lag, and at these near the position, fluid flows into the pressing chamber of low voltage side by the small gap that forms from high-tension side pressing chamber between projection and side face, produce vortex this moment by flowing, according to the principle of flute, send abnormal sound easily.

Therefore, when the convolute-hydrodynamic mechanics of running prior art, fixedly sending abnormal sound between volute body and the rotary vortex body simultaneously from many places, the big noise that these abnormal sounds can become high frequency is outwards spilt by fluid intake etc., like this, the problem that has the running environmental deterioration of machinery.

In addition, adopt existing technology, many projections (groove) of extending along axial total length in the side face setting of clinch.Therefore, the gap of removing on the side face of clinch between the clinch of the clinch of position beyond the projection comparing fixing volute body with the clinch that projection is not set and rotary vortex body increases, and therefore, also can produce the problem of compression efficiency reduction.

Summary of the invention

The present invention is a mirror with above-mentioned existing technical problem, and first purpose of the present invention provides the convolute-hydrodynamic mechanics that improves the intensity that is arranged on the projection on the clinch, the power loss in the time of can preventing to turn round simultaneously, noise etc. for the sealing that improves pressing chamber.

The projection that second purpose of the present invention provides by clinch can reduce the compressed fluid leakage, and can improve the convolute-hydrodynamic mechanics of compression efficiency.

The 3rd purpose of the present invention provides and can suppress the noise that produced by the projection of clinch etc., can realize the convolute-hydrodynamic mechanics of good running environment with low noise.

Have according to convolute-hydrodynamic mechanics of the present invention: first volute body of upright vertically that be provided with, clinch from radially inner side to radial outside that be rolled into spiral type from end plates; With end plates that this volute body is oppositely arranged on uprightly be provided for overlapping another the volute body that forms clinch a plurality of pressing chambers, be rolled into spiral type to radial outside from radially inner side vertically with the clinch of this volute body.

And in order to solve above-mentioned problem, the structure characteristic that first face adopts is: be arranged on the scrollwork direction at least on the side face of the clinch of above-mentioned first volute body and have at interval, along axially extended many projections; The shape of the cross section of this each projection is that top and the domatic of above-mentioned side face that will connect projection form as concave curved surface, and the scope of the angle α of adjacent projection is set at: the lower limit α of above-mentioned angle [alpha] _Min, be that the radius of curvature of the above-mentioned side face at h, the position that forms above-mentioned projection is the size of space of the inner peripheral surface of ρ, relative above-mentioned clinch and the radial direction between the outer circumferential face when being T at height when above-mentioned projection, for

${\mathrm{\α}}_{\min }=\frac{2\sqrt{(T/2)\×h}}{\mathrm{\ρ}};$

The CLV ceiling limit value α of above-mentioned angle [alpha] _MaxBe between above-mentioned first the adjacent projection of volute body the clinch side face and above-mentioned another volute body clinch side face near the time gap size be S ', when clipping that a little gap size is S among the top of the adjacent above-mentioned projection of the side face of above-mentioned immediate clinch of above-mentioned first volute body and the gap between above-mentioned another the clinch side face of volute body, satisfy in the scope of S '＞S; And making the side face of the clinch relative with above-mentioned each projection is even surface.

According to second aspect present invention, the concave curvatures of projection forms concaved circular cambered surface.

According to third aspect present invention, the size of space T of the radial direction of formation of the radius of curvature R of the concave curvatures of the projection that forms on clinch and clinch has the relation of 1/4 * T≤R.

According to fourth aspect present invention, make the top width size W of the projection that on clinch, forms ₁With projection whole width size W ₂Formation has W ₁* 2≤W ₂Relation.

According to fifth aspect present invention, the interval P that projection is formed on the scrollwork direction is narrow, wide at radial outside at radially inner side.

According to sixth aspect present invention, projection only is arranged on inner peripheral surface clinch, relative with the clinch of another volute body and any one side face among the outer circumferential face of first volute body.

According to seventh aspect present invention, form on the inner peripheral surface and outer circumferential face of clinch of the volute body that is arranged on first in each projection that clinch forms, be arranged on another the inner peripheral surface and outer circumferential face of clinch of volute body, be arranged on first the inner peripheral surface of clinch of volute body and the inner peripheral surface of the clinch of another volute body and be arranged on first the outer circumferential face of clinch of volute body and among the outer circumferential face of the clinch of another volute body any.

According to eighth aspect present invention, the width W at the top of projection ₁Be 0mm≤W ₁≤ 2mm.

According to ninth aspect present invention, when projection top during near the side face of relative clinch, the gap size S of interior all sides ₁Gap size S with outer circumferential side ₂Has S ₁＜S ₂Relation.

According to tenth aspect present invention, each projection is arranged on the radially the most inboard position of removing clinch.

According to the present invention the tenth on the one hand, the height h of projection is in the scope of 0.12mm 〉=h 〉=0.03mm.

According to the present invention the 12 aspect, only the axial part of leaving from these end plates among the clinch that uprightly is arranged on the end plates forms each projection.

According to the present invention the 13 aspect, only the axial part of leaving from these end plates among the clinch that uprightly is arranged on end plates forms each projection, and will form same plane except that the side face of the above-mentioned clinch of above-mentioned projection and the top end of above-mentioned projection.

According to the present invention the 14 aspect, only the radially inner side of scrollwork direction forms each projection in clinch, and, at the radial outside of clinch non-projection is set and forms the position.

According to the present invention the 15 aspect, the non-projection formation position of clinch is the whole position of roughly rolling up a circle to radially inner side in the immediate position that begins to compress of outermost radial outside from the clinch of the clinch of first volute body and another volute body.

First face according to the present invention, because the shape of cross section of each projection will connect the domatic of projection top and above-mentioned side face and form as concave curvatures, thereby, the cross section of each projection can be formed triangle roughly, thus, the concentrated intensity that improves the top of stress can be prevented, durability can be improved.

In addition, when the top of projection contacts the side face of relative clinch, blunt or abrasion easily, therefore, need not contact several times just can be good with clinch week facing up, like this, just can reduce power loss, damage, noise, snap-in etc. can be prevented in addition, durability, reliability can be improved.

In addition, with the lower limit α of the angle α of adjacent projection _MinThe size of space T of the radius of curvature ρ of the side face at the position of use rising height h, formation projection, the radial direction of clinch is set at

${\mathrm{\α}}_{\min }=\frac{2\sqrt{(T/2)\×h}}{\mathrm{\ρ}};$

Thereby, for example when raw material with cutting tool cutting volute bodies such as end mills, when forming clinch, only need to carry out cutting along the inner peripheral surface and the outer circumferential face of clinch, just cutting becomes the bottom surface sections between inner peripheral surface and outer circumferential face in the raw material apace.

Like this, when making volute body, the clinch of spiral type can be formed expeditiously, in addition, in cutting, also each projection can be shaped simultaneously by the cutting of carrying out least restrictive along two side faces, thereby, can enhance productivity.

And then, when the side face of the clinch of clinch side face between the adjacent projection of the volute body that is in first and another volute body near the time gap size be S ', when clipping that any one little gap is of a size of S among the gap between the clinch side face of the top of the adjacent projection of first the above-mentioned immediate clinch side face of volute body and another volute body, set the CLV ceiling limit value α of the angle of neighboring projection _MaxIn the scope that satisfies S '＞S, thereby, even for example clinch is in the intermediate portion of each projection during the most approaching relative clinch, also can make the gap that forms by projection position less than by this gap that forms near the position, can bring into play the efficient of tortuous sealing reliably in the position of projection.Like this, clinch also can both make between the clinch of each volute body to keep little gap when comprising the most approaching relative clinch in all positions of projection all the time, can improve the sealing of each pressing chamber.

According to second aspect present invention the concave curvatures of each projection is formed concaved circular cambered surface, thereby, for example can use instruments such as end mill easily to process the concave curvatures of each projection, can boost productivity.

The size of space T that forms the radial direction of the radius of curvature R of concavity curved surface of projection and clinch according to third aspect present invention has the relation of 1/4 * T≤R, thereby, need not change the instruments such as end mill that when the side face of cutting clinch, use, use to cut same as before and add each projection, can boost productivity, realize reducing cost.

Form projection according to fourth aspect present invention, make its top width size W ₁With projection whole width size W ₂Has W ₁* 2≤W ₂Relation, thereby, widened the width of projection foundation side and can improve intensity, can improve durability.

According to fifth aspect present invention, the interval P that projection is formed on the scrollwork direction narrows down at radially inner side.Thereby, when the radius of curvature of clinch when radially inner side reduces, can be according to this radius of curvature with a plurality of projections of narrow arranged spaced.Therefore, the gap between the relative clinch of radial direction can be reduced and can improve the sealing of pressing chamber, can improve compression performance.

Only be arranged on according to the sixth aspect present invention projection on first the clinch of volute body inner peripheral surface relative and any one the side face among the outer circumferential face with the clinch of another volute body, thereby, can make projection relative, can prevent that contact causes snap-in etc. between the projection with the side face of level and smooth clinch.

According to seventh aspect present invention, become on the inner peripheral surface and outer circumferential face of clinch of the volute body that is arranged on first in each protrusion-shaped that clinch forms, be arranged on another the inner peripheral surface and outer circumferential face of clinch of volute body, be arranged among the structure of outer circumferential face of clinch of first the inner peripheral surface of clinch of volute body and the inner peripheral surface of the clinch of another volute body, the outer circumferential face of clinch of volute body that is arranged on first and another volute body any.Like this, can both make projection relative, can both prevent that contact causes snap-in etc. between the projection with the side face of level and smooth clinch in above any situation.

Form the width W at the top of projection according to eighth aspect present invention ₁Be 0mm≤W ₁≤ 2mm, thereby when the top of projection contacted the side face of relative clinch, blunt, abrasion easily several times just can be good with clinch week facing up and do not need to contact.Like this, just can reduce power loss, in addition, can prevent damage, noise, snap-in etc., can improve durability, reliability.

According to ninth aspect present invention, the gap size S of the interior all side of the top of each projection during near the side face of relative clinch ₁Gap size S with outer circumferential side ₂Has S ₁＜S ₂Relation.Thereby, when between the relative clinch of radial direction, producing contact, the inner peripheral surface of clinch of volute body of driving side and the outer circumferential face of the clinch of the volute body of fixed side or slave end are contacted earlier.By this contact, the power that the volute body of driving side is rotated on the direction identical with the rotation force direction works, and promotes the volute body of driving side on the direction of rotation power, therefore, can eliminate and rock, and can reduce action sound, improves compression efficiency.

According to tenth aspect present invention, each projection is set removing on the radially the most inboard position of clinch, thereby, can in the total length of clinch, only improve the sealing of pressing chamber and position that reliability needs projection this projection is set, reduce manufacture cost thereby can simplify machining operation.

The tenth on the one hand according to the present invention, and the height h that projection forms is in the scope of 0.12mm 〉=h 〉=0.03mm.At this moment; clinch is subjected to the thermal distortions easily such as the heat of compression in each pressing chamber generation; for example; known its amount of deformation is about 0.03mm with respect to the footpath direction; therefore, form the height h of projection more than 0.03mm, like this; can prevent that the position between each projection in the clinch directly contacts relative clinch when thermal distortion takes place, can protect clinch to avoid because contact causes damage.In addition,, the sealing of pressing chamber can either be guaranteed, the projection miniaturization can be made simultaneously because the height h of projection is limited in below the 0.12mm.

The 12 aspect according to the present invention only forms projection on the axial part of leaving end plates in clinch, thereby can shorten the axial length of projection, and can reduce because the abnormal sound that projection causes.In addition, with respect to clinch axially can shorten slot part between the neighboring projection, therefore, can reduce the mean gap between the clinch of the clinch of fixing volute body and rotary vortex body, can improve compression efficiency.And, can reduce the inside temperature of clinch, can prolong the life-span of end of blade sealing etc.In addition, when the significant tooth top of the generation thermal distortion portion at clinch forms projection, can prevent because the snap-in that thermal distortion causes by projection.

And, because projection is not set, so when forming projection in the tooth root side of clinch, for example, only need with in the side face of clinch become each projection between the position, become flute profile from the clinch tooth top to axial neutral position cutting, just can form each projection simply.Therefore, compare with the occasion that projection is set in the clinch entire axial length, can reduce the cutting clinch the position, can cut down finished cost, can guarantee simultaneously the dimensional accuracy of tooth root side easily.

And then, in the tooth root side of clinch, the gap between the inner peripheral surface of the outer circumferential face of clinch and relative clinch can be set at the identical degree of the size of space when not establishing projection.Therefore, can prevent that clinch from this position contact, can improve reliability.

The 13 aspect according to the present invention, only form projection on the axial part of leaving end plates in clinch, and will form same plane except that the side face of the above-mentioned clinch of above-mentioned projection and the top end of above-mentioned projection, thereby, can make the top end of the side face of tooth root side of clinch and projection continuous.Therefore, when forming projection, for example, only need position, become flute profile to axial neutral position cutting, so can form each projection simply with the centre that becomes each projection in the side face of clinch.

The 14 aspect according to the present invention, only the radially inner side in the scrollwork direction of clinch forms each projection, and the formation position of non-projection is set at the radial outside of clinch, thereby, for example at the closing position of the pressing chamber that forms in the outermost radial outside of clinch etc., can make the most approaching or contact between the level and smooth side face of each clinch, thus, pressing chamber can be sealed well, compression performance can be improved the big radial outside of the volume change influence of compression.

Especially because at the outer circumferential side of clinch because the temperature rise that the heat of compression causes is few, so be difficult to produce the snap-in phenomenon, therefore, the non-projection in the outer circumferential side setting of clinch form that the position can reduce and another clinch between the gap, like this, can make the most approaching reliably or contact between the level and smooth side face at the radial outside of each clinch, can prevent abnormal sound that the projection by the radially inner side of clinch causes from the suction port of radial outside etc. to external leaks.

The 15 aspect according to the present invention, the non-projection formation position of clinch is the clinch of each volute body is roughly rolled up a circle to radially inner side to outermost, the immediate position that begins to compress in the whirlpool whole position, thereby, for example can improve the compression initial position radial outside pressing chamber sealing, can in the gamut from the radial outside to the radially inner side of clinch, stably compress.In addition, because non-projection formation position is set in the gamut of approximately rolling up a circle to radially inner side from the beginning compression position, so must make the most approaching or contact between the level and smooth side face of each clinch at a place at radial outside, between this side face immediate position can positively block since the different sound that the projection of radially inner side causes to external leaks.

Description of drawings

Fig. 1 is the sectional arrangement drawing that the scroll type air compressor of the first embodiment of the present invention is used in expression;

Fig. 2 is the drawing in side sectional elevation that the arrow II-II direction from Fig. 1 is seen scroll type air compressor;

Fig. 3 is the drawing in side sectional elevation of major component that amplifies the clinch of the clinch of the fixedly volute body in the presentation graphs 2 and rotary vortex body;

Fig. 4 is the stereoscopic figure that decides what is right and what is wrong in the part of the part of the end plates that amplify the expression rotary vortex body, clinch, radially inner side projection, radial outside projection;

Fig. 5 is the drawing in side sectional elevation that the major component of the clinch that amplifies the expression rotary vortex body, radially inner side projection, radial outside projection is amplified;

The explanatory drawing of the relation at the radial dimension of the cutting tool that Fig. 6 uses when being the clinch of expression cutting rotary vortex body and the height of radial outside projection, interval etc.;

Fig. 7 is the explanatory drawing of the relation at the interval, angle of expression radius of curvature of clinch and outside diameter projection etc.;

Fig. 8 is the explanatory drawing of relation of the footpath direction size of the size of space of radial direction of expression clinch and cutting tool;

Fig. 9 is the explanatory drawing of the state of the most approaching relative clinch of expression radial outside projection;

Figure 10 be expression when between the clinch of the intermediate portion of each radial outside projection near the time, form the explanatory drawing of the state in little gap in the tip side of projection;

Figure 11 be expression when between the clinch of the intermediate portion of each radial outside projection near the time, form the explanatory drawing of the state in big gap in the tip side of projection;

Figure 12 be medelling be illustrated in the explanatory drawing of immediate state between the intermediate portion clinch of radial outside projection;

Figure 13 be expression when between the clinch of the intermediate portion of each radial outside projection near the time, the performance diagram of the gap of the tip side formation of projection and the relation of the angle between each projection;

Figure 14 is the drawing in side sectional elevation that the scroll type air compressor of the second embodiment of the present invention is used in expression;

Figure 15 is a drawing in side sectional elevation of seeing that from the position identical with Fig. 3 the fixing major component of the clinch of volute body and rotary vortex body is amplified;

Figure 16 is the drawing in side sectional elevation that amplifies the amplification of the major component of representing fixed side radial outside projection;

Figure 17 is the stereoscopic figure of partly cut-away of a part that amplifies end plates, clinch and the fixed side radial outside projection of expression fixed scroll body;

Figure 18 is that the arrow XVIII-XVIII direction from Figure 15 is amplified the fixedly sectional arrangement drawing of the major component amplification of the clinch of volute body and rotary vortex body of expression;

Figure 19 is the drawing in side sectional elevation that the major component of the clinch of the clinch of the fixedly volute body seen of the arrow XIX-XIX direction of expression from Figure 18 and rotary vortex body is amplified;

Figure 20 is a sectional arrangement drawing of representing that from the position identical with Figure 18 the major component of the clinch of second embodiment's clinch and two comparative examples is amplified;

Figure 21 is the drawing in side sectional elevation of the scroll type air compressor of the application third embodiment of the present invention represented from the position identical with Fig. 2;

Figure 22 is the drawing in side sectional elevation of the scroll type air compressor of expression first variation of the present invention;

Figure 23 is the drawing in side sectional elevation of the scroll type air compressor of expression second variation of the present invention;

Figure 24 is the drawing in side sectional elevation that amplifies the radial outside projection of the scroll type air compressor of representing the 3rd variation of the present invention.

[unit number explanation]

1,21,41 fixing volute bodies;

2,11,22,27,42 end plates;

3,12,23,28,43,47 clinchs;

3A, 12A, 23A, 28A, 43A, 47A inner peripheral surface (side face);

3B, 12B, 23B, 28B, 43B, 47B external application face (side face);

8 live axles; 10,26,46 rotary vortex bodies;

13 radially inner side projections; 13A, 14A, 14A ', 31A top;

13B, 14B, 14B ', 31B concaved circular cambered surface (concave curvatures);

14,14 ' radial outside projection (projection)

15,15 ', 15 ", 30 pressing chambers;

16 cutting tools; 31,45,52 fixed side radial outside projections (projection);

34,48 rotary side radial outside projections (projection);

43C, the non-projection of 47C forms the position;

51 fixed side radially inner side projections (projection); 53 rotary side radially inner side projections (projection);

The spaced radial size of T clinch; The radius of R concave circular arc shape;

W ₁The width of projection end face; W ₂The width of projection integral body;

The scrollwork direction size of space of P clinch; The angle of α neighboring projection;

α _MinThe lower limit of angle α; α _MaxThe CLV ceiling limit value of angle α;

The height of h projection;

S, S _OK, S _NG, S _Max, S ₁, S ₂Gap size between projection and the relative clinch;

The radial dimension of D cutting tool.

Embodiment

Below, be example explains embodiments of the invention with reference to accompanying drawing convolute-hydrodynamic mechanics with the scroll type air compressor.

At this, Fig. 1～Figure 13 represents first embodiment, at present embodiment, is that example describes with the structure that projection is set on rotary vortex body.

Fig. 1 represents the sectional arrangement drawing of scroll type air compressor, in this Fig. 1, and the 1st, the fixedly volute body of scroll type air compressor; Fixedly volute body 1 is installed in the end of barrel-type casing (not illustrating).In addition, fixedly volute body 1 comprises: form circular plate type and center and the consistent end plates that set 2 of the axis 01-01 of live axle 8 described later; Uprightly be arranged on the clinch 3 of the spiral type on the surperficial 2A of these end plates 2; Surround clinch 3 from the radial outside of end plates 2 in the outstanding tube portion 4 of axle direction; The flange part 5 that extends laterally along footpath direction from this one 4.

Here, Fig. 2 is the drawing in side sectional elevation of scroll type air compressor shown in Figure 1, and as shown in Figure 2, clinch 3 is coiling top, is that the coiling terminal forms spiral type with radial outside (outside of radial direction) with radially inner side (inboard of radial direction).In addition, the inner peripheral surface 3A of clinch 3 and outer circumferential face 3B form does not have concavo-convex even surface.

In addition, on fixing volute body 1, the radial outside that is positioned at end plates 2 is provided with suction port 6, is used for sucking in pressing chamber 15 described later air, in the central authorities of end plates 2 exhaust port 7 is set, and is used to discharge the air in pressing chamber 15 compressions.

The 8th, can be arranged on the live axle on the housing rotationally, having at this live axle 8 becomes the axis of center of rotation 01-01.In addition, live axle 8 forms the fixedly bent axle 8A of the eccentric prolongation in top of volute body 1 side, becomes the only eccentric turning radius ε of axis 01-01 of axis 02-02 relative drive shaft 8 of the center line of this bent axle 8A.And, on the bent axle 8A of live axle 8, rotary vortex body 10 described later can be installed rotationally by rotary bearing 9.

The 10th, 1 relative with fixing volute body, be arranged on the rotary vortex body on the live axle 8, this rotary vortex body 10 is mainly by being the center with axis 02-02, forming the end plates 11 of circular plate type and constitute at the clinch 12 of the spiral type of the upright setting of axle direction from the surperficial 11A of these end plates 11.

And, set rotary vortex body 10, so that the clinch 3 of clinch 12 relative fixed volute bodies 1, for example, R staggers 180 ° and spends coincidence.Thus, between two clinchs 3,12, form a plurality of pressing chambers 15 described later.And when scroll type air compressor turned round, the pressing chamber 15 of outer circumferential side sucked air from suction port 6, and is last Yi Bian rotary vortex body 10 moves compression successively to radially inner side on one side with this air in rotary course, discharges pressurized air by exhaust port 7.

Here, the clinch 12 that constitutes rotary vortex body 10 axially (direction of axis 01-01) uprightly be arranged on the surperficial 11A of end plates 11.In addition, it is coiling top that clinch 12 forms with the radially inner side, be the coiling terminal with the radial outside, have a spiral type of n circle, the interval of the radial direction of this moment, promptly first lap and second encloses, second circle and the 3rd encloses ... the interval of (n-1) circle and n circle is set at T.

In addition, on the inner peripheral surface 12A of clinch 12 and outer circumferential face 12B, form radially inner side projection 13 described later and radial outside projection 14.And clinch 12 for example can use cutting tool cutting such as end mill to become spiral type.

13,13 ... be provided in a side of many radially inner side projections of the inner peripheral surface 12A side of clinch 12, as shown in Figure 3, Figure 4, this each radially inner side projection 13 has at interval, axially extends to form in the scrollwork direction (length direction) of clinch 12.Here, each radially inner side projection 13 when cross section is as shown in Figure 5 seen, forms general triangular by in a narrow margin top 13A with left and right domatic concaved circular cambered surface 13B, the 13B that become the inner peripheral surface 12A that is connected this top 13A and clinch 12.In addition, each concaved circular cambered surface 13B is the slick and sly concave curved surface that forms of 12 inner peripheral surface 12A from top 13A to clinch.

Another face, 14,14... has many radial outside projections of at interval, axially extending the outer circumferential face 12B side that is arranged on clinch 12 in the scrollwork direction, this each radial outside projection 14 is identical substantially with above-mentioned each radially inner side projection 13, the concaved circular cambered surface 4B of the domatic concave curvatures about having top 14A and becoming forms general triangular when the cross section is seen.

At this, detailed shape, the configuration relation of the radially inner side projection 13 on the inner peripheral surface 12A of the clinch 12 that is arranged on rotary vortex body 10 is described.

At first, as shown in Figure 5, the top 13A of radially inner side projection 13 is outstanding from the inner peripheral surface 12A of clinch 12, footpath direction height h, and this height h for example, is set at a determined value in the scope of formula 1 in following formula.

[formula 1]

0.12mm≥h≥0.03mm

At this moment, clinch 12 is subjected to the easy thermal distortion of the heat of compression in 15 generations of each pressing chamber, and for example, known its amount of deformation is about 0.03mm with respect to the footpath direction.Therefore; the height h that forms radially inner side projection 13 like this, just can prevent when thermal distortion takes place more than 0.03mm; the position between each projection 13 in the clinch 12 directly contacts relative clinch 3, can protect clinch 3,12 to avoid causing damage by contact.In addition,, like this, the sealing of pressing chamber 15 can either be guaranteed, projection 13 miniaturizations can be made simultaneously because the height h of radially inner side projection 13 is limited in below the 0.12mm.

In addition, constitute the concaved circular cambered surface 13B of the radially inner side projection 13 of clinch 12, form the part that is connected with inner peripheral surface 12A (roughly being domatic whole in the present embodiment) that connects in top 13A and inner peripheral surface 12A domatic at least.And, the radius of curvature R of concaved circular cambered surface 13B as shown in the formula in formula 2, be set at more than 1/4 times of the size of space of the radial direction of clinch 12, below 1 times.

[formula 2]

1/4×T≤R≤T

In addition, in the scope of the R that is set at above-mentioned formula 2, the scope that is set at following formula 3 is better value.

[formula 3]

2/5×T≤R≤3/5×T

Thus, when the inner peripheral surface 12A of cutting clinch 12, for example, do not change the cutting tools such as end mill that processing clinch 12 uses, just can process radially inner side projection 13A continuously by enough same cutting tools.In addition, concaved circular cambered surface 13B can prevent in the application sets, thus the intensity of raising top 13A.

In addition, also can form concaved circular cambered surface 13B by simple circular arc with the radius of curvature R in the scope more than 1/4 times, below 1 times of the size of space T of radial direction.In addition, also can make concaved circular cambered surface 13B by connecting the concave curvatures that a plurality of circular arcs formed, became the radius of curvature R more than 1/4 times of the size of space T that has radial direction as a whole.

In addition, the width as the top 13A that establishes radially inner side projection 13 is W ₁, the projection integral width of establishing the concaved circular cambered surface 13B about comprising is W ₂The time, the width W of setting projection 13 integral body ₂As following formula 4:

[formula 4]

W ₂≥W ₂×2

Because wide cut degree ground formation concaved circular cambered surface 13B, radially inner side projection 13 has at the sufficient intensity that also can not cause damage when fixedly the clinch 3 of volute body 1 contacts.

And then, the width W of the top 13A of setting radially inner side projection 13 ₁As following formula 5:

[formula 5]

0mm≤W ₁≤2mm

In addition, at the W that is set at above-mentioned formula 5 ₁Scope in, when being set in the scope of following formula 6, can obtain more good compression performance.

[formula 6]

0.1mm≤W ₁≤0.3mm

Like this, be relatively fixed the outer circumferential face 3B of clinch 3 of volute body 1 when going up, blunt or abrasion easily when the top 13A contact that forms in a narrow margin, like this, by top 13A by blunt, so do not need to contact several times with the outer circumferential face 3B of clinch 3, just can be good with this outer circumferential face 3B break-in.

Another face forms radially inner side projection 13, make the interval P of scrollwork direction of its length direction that becomes clinch 12 narrow, wide at radial outside at radially inner side.At this, explain the configuration of each radially inner side projection 13: as shown in Figure 3, on rotary vortex body 10 in order to draw the involute of clinch 12, the center 02 (position of axis 02-02) obtained with rotary vortex body 10 be the center, radius is the blockade line C of a, and blockade line radius a be by this rotary vortex body 10 of the plate thickness of the clinch 12 of turning radius ε and rotary vortex body 10 decision intrinsic value, be the known parameters of picture involute.

And the tangent line of establishing in the countless tangent line with the tangent prolongation of above-mentioned blockade line C arbitrarily is L ₁, and be located at from this tangent line L ₁The tangent line of other of the position of angle of deflection is L one by one ₂, L ₃..., so above-mentioned radially inner side projection 13 is configured in above-mentioned each tangent line L ₁, L ₂... on.

Determine adjacent radially inner side projection 13 (each tangent line L here, ₁, L ₂...) angle α in the formula 14 described later the expression lower limit α _MinCLV ceiling limit value α with expression in the formula 28 _Max, satisfy following formula 7, for example, be set at about 4 °～26 °.

(formula 7)

α _max＞α≥α _min

In addition, the interval P of the scrollwork direction of adjacent radially inner side projection 13 is narrow at the first lap of the radially inner side that becomes clinch 12, and is wide at the n circle that becomes radial outside.Like this, owing to make the size of space P of adjacent radially inner side projection 13 radially inner side narrow (little), the position that radius of curvature for relative clinch 3 is little, bending change is big also can make the top 13A of radially inner side projection 13 and the outer circumferential face 3B of clinch 3 have the configuration of predetermined gap ground.

In addition, among the total length of the scrollwork direction of clinch 12, remove from the inner peripheral surface 12A at the position that becomes the radially the most inboard about half-turn in coiling top and form radially inner side projection 13.At the inner peripheral surface 12A of this clinch 12, from the position radius of curvature minimum of the about half-turn in coiling top, the dimensional changes that causes of being heated is also minimum, therefore do not establish yet abundant seal compression chamber 15 of each radially inner side projection 13, so, this position formation even surface.

And then, as shown in Figure 5, when top 13A when being relatively fixed the outer circumferential face 3B of volute body 1 side clinch 3, the gap size S between the top 13A of radially inner side projection 13 and the outer circumferential face 3B of clinch 3 is S1.And, shown in following formula 8, set this gap size S ₁Be top 14A during near the inner peripheral surface 3A of the clinch 3 of volute body 1 sides that are relatively fixed and the gap size S of inner peripheral surface 3A less than radial outside projection described later 14 ₂Value.

[formula 8]

S ₁＜S ₂

Because set the gap size S between radially inner side projection 13 and the clinch 3 in this wise ₁Less than the gap size S between radial outside projection 14 and the clinch 3 ₂So, when coming in contact between each clinch 3,12, the outer circumferential face 3B of the radially inner side projection 13 (inner peripheral surface 12A) of the clinch 12 that is located at rotary vortex body 10 and the fixing clinch 3 of volute body 1 is contacted earlier.

And the radially inner side projection of the clinch 12 of rotary vortex body 10 13 is in case contact earlier with the fixing clinch 3 of volute body 1, and the power that rotary vortex body 10 is rotated on the direction identical with the rotation force direction is that fulcrum works with this contact position just.Like this, rotary vortex body 10 is pushed on the direction of rotation power, therefore, for example can eliminate between the housing of rotary vortex body 10, be provided with prevent rocking of free-wheeling system (not illustrating) etc.

Another face is identical with above-mentioned radially inner side projection 13 about conditions such as the shape of each the radial outside projection 14 on the outer circumferential face 12B of the clinch 12 that is arranged on rotary vortex body 10, configuration relations.Therefore, omit explanation about the shape in the cross section of radial outside projection 14 etc.At this moment, the angle α of radial outside projection 14 and radially inner side projection 13 are set in the scope shown in the above-mentioned formula 7 roughly the samely.

Below, the lower limit α of the angle α that determines adjacent radially inner side projection 13 (perhaps the radial outside projection 14) is described with reference to Fig. 6～Figure 13 _MinWith CLV ceiling limit value α _Max

At first, be example with the angle α of radial outside projection 14, its lower limit α is described _MinEstablishing method.At this, as shown in Figure 6, for example use cutting tools 16 such as end mill, the material of cutting rotary vortex body 10 (former material) forms radial outside projection 14.

And, the size (outside dimension) of establishing the footpath direction of cutting tool 16 in Fig. 6 is β for D, the angle of elongation line of establishing the concaved circular cambered surface 14B of neighboring projection 14, so, the relation of existence shown in following formula 9 between the height h of footpath direction dimension D, angle beta and projection 14:

[formula 9]

$\mathrm{\β}=4\×\sqrt{h/D}$

In addition, when using the cutting tool 16 of footpath direction dimension D, the interval P of the minimum that between projection 14, may form _MinCan represent by enough following formula 10,, then can access the formula on the right of formula 10 above-mentioned this formula of formula 9 substitutions.At this moment, little with angle beta is precondition.

[formula 10]

$P_{\min }=\frac{D\×\mathrm{\β}}{2}=2\sqrt{D\×h}$

In addition, as shown in Figure 7, when the radius of curvature of the clinch 12 at the formation position of projection 14 is ρ, the angle that projection is 14 (interval of involuted angle) α can enough projections 14 interval P _MinRepresent with radius of curvature ρ such as following formula 11:

[formula 11]

$\mathrm{\α}=\frac{P_{\min }}{\mathrm{\ρ}}=\frac{2\sqrt{D\×h}}{\mathrm{\ρ}}$

At this, as shown in Figure 8, when the former material of cutting rotary vortex body 10 forms clinch 12, by mobile cutting tool 16 cutting inner peripheral surface 12A along the track a spiral type ground of corresponding inner circumferential surface 12A.Pass through along the mobile cutting tool 16 cutting outer circumferential face 12B in track b spiral type ground of the outer circumferential face 12B of corresponding clinch 12 simultaneously.Like this, inner peripheral surface 12A that can cut in the former material and the bottom surface sections between the outer circumferential face 12B and form the clinch 12 of spiral type at clinch 12.

At this moment, if the footpath direction dimension D of cutting tool 16 is less than 1/2 of the size of space T of clinch 12, produce the interval of footpath direction between track b when track a that will be when cutting inner peripheral surface 12A and cutting outer circumferential face 12B, do not have processed residual at the former material of this interval location.As a result, when the cutting clinch,, must cut former material residual between two side face 12A, 12B again, cause the cutting rate to reduce beyond two side face 12A, 12B cutting.

Thereby, for only carrying out cutting along two side face 12A, 12B just can form clinch 12 expeditiously, can make two track a, b contacts or partly coincidence, therefore, must make the size of space T of radial direction of clinch 12 and the footpath direction dimension D of cutting tool 16 satisfy following formula 12:

[formula 12]

$D\&GreaterEqual;\frac{\mathrm{<figure-callout\; id="2"\; label="T"\; filenames="C20041006293800321.png,C20041006293800331.png"\; state="\{\{state\}\}">T</figure-callout>}}{2}$

As a result, can access following formula 13 by using above-mentioned formula 11, formula 12, thereby, the lower limit α of the angle α of adjacent radial outside projection 14 _MinAs following formula 14:

[formula 13] [formula 14]

$\mathrm{\&alpha;}=\frac{2\sqrt{D\&times;h}}{\mathrm{\&rho;}}\&GreaterEqual;\frac{2\sqrt{T/2\&times;h}}{\mathrm{\&rho;}};$ ${\mathrm{\&alpha;}}_{\min }=\frac{2\sqrt{T/2\&times;h}}{\mathrm{\&rho;}}$

Thereby, for example, when the minimum of the heat distortion amount of considering clinch 12 uses height h=0.03mm (with reference to above-mentioned formula 1), highly in the above-mentioned formula 14 of h substitution, can draw as lower limit α as the height of radial outside projection 14 _MinFormula more specifically, be following formula 15:

[formula 15]

${\mathrm{\&alpha;}}_{\min }=\frac{\sqrt{0.06\&times;T}}{\mathrm{\&rho;}};$

In this wise, at present embodiment, set the lower limit α of angle α for using above-mentioned formula 12 (formula 14 specifically) to determine of adjacent radial outside projection 14 _MinAbove angle.Like this, when forming rotary vortex body 10, can process clinch 12 efficiently by minimum cutting.

Below, the CLV ceiling limit value α of the angle α that determines radial outside projection 14 is described with reference to Fig. 9～Figure 13 _Max

At first, when rotary vortex body 10 rotation, be located at radial outside projection 14 clinch 3 of the most approaching fixedly volute body 1 and the action that radial outside projection 14 is left clinch 3 successively successively at each position of clinch 12 repeatedly.

At this, be conceived to the radial outside projection 14 of the most approaching relative clinch 3, as shown in Figure 9, the pressing chamber 15 that is positioned at its left and right sides becomes the states that cut off mutually by projection 14, therefore, can improve the sealing of each pressing chamber 15.

In addition, as shown in figure 10, for example, between this side face 3A, 12B, form the gap size S ' of the minimum corresponding with the height h of projection 14 when the clinch 12 of rotary vortex body 10 during at the most approaching relative clinch 3 of the intermediate portion A of 14 of each projections.At this moment, clip clinch 3,12 side face 3A, 12B be in relative clinch 3 state farthest of distance near two adjacent radial outside projections 14 of position (intermediate portion A), the gap between it forms overall dimensions.But, owing to moderately the angle α of each radial outside projection 14 is set at little angle value (for example, angle [alpha] in advance _OK), so a little gap size S who clips in the gap that forms between two adjacent projections 14 of intermediate portion A and the clinch 3 can be formed the gap size S also littler than the gap size S ' of intermediate portion A _OK(S '＞S _OK).

Thus, even increase in the A gap, intermediate portion of 14 of radial outside projections, also can be by little gap size S in the formation of the position of projection 14 _OKGuarantee the sealing of each pressing chamber 15, can bring into play the effect of the complications sealing of radial outside projection 14.In addition, between the top of radial outside projection 14 14A and relative clinch 3, form small gap size S ₂(with reference to Fig. 5), still, this gap size S ₂Be to comprise above-mentioned gap size S ', S _OKTwo sides' size does not influence both magnitude relationship, thereby, omit explanation.

In addition, as shown in figure 11, be set at big value (for example, angle [alpha] at angle α with each radial outside projection 14 _NG) time, the gap size S between projection 14 and the relative clinch 3 becomes the gap size S greater than the gap size S ' of intermediate portion A _NG(S _NG〉=S '), radial outside projection 14 is for the almost not effect of sealing of pressing chamber 15.

Thereby, in order to utilize radial outside projection 14 to improve the sealing of pressing chamber 15, as long as when the inner peripheral surface 3A of the most approaching relative clinch 3 of the intermediate portion A of 14 of adjacent projections (the outer circumferential face 12A of clinch 12), a little gap size S is little just more passable than the gap size S ' (the height h of ≈ projection 14) of intermediate portion A among the gap that forms between the inner peripheral surface 3A of top 14A that clips two adjacent projections 14 of intermediate portion A and clinch 3.That is, must set the angle α of radial outside projection 14, following formula 16 is set up.

[formula 16]

S′＞S

At this, the relation of gap size S and the angle α that forms projection 14 between projection 14 and the clinch 3 is described with reference to Figure 12.

At first, the state (with reference to Figure 10) of the clinch 3 of the most approaching fixedly volute body 1 of intermediate portion A of the clinch 12 of Figure 12 pattern ground expression rotary vortex body 10.Among the figure, the 17th, the circular curve of the outer circumferential face 12B of the clinch 12 of partly approximate rotary vortex body 10, the each point B on this circular curve 17 is equivalent to projection 14, clips the symmetrical position that intermediate portion A is configured in the left and right sides.

In addition, the 18th, the approximate fixedly circular curve of the inner peripheral surface 3A of the clinch 3 of volute body 1, the some B ' on this circular curve 18 are equivalent in the clinch 3 position relative with projection 14.Therefore, the intermediate portion A that the lengths table of line segment BB ' is shown in clinch 12 is in closest approach, projection 14 is left relative clinch 3 farthest the time, the gap size S that forms between the clinch 3 of the top of projection 14 14A (below, the gap size S that claims this state is gap size S _Max).

And in Figure 12, circular arc AB enough its radius of curvature ρ of energy and central angle φ are expressed as follows and state formula 17, and enough its radius of curvature of circular arc AB ' energy ρ ' and central angle φ ' are expressed as follows and state formula 18:

[formula 17] [formula 18]

Circular arc AB=ρ * φ; Circular arc AB '=ρ ' * φ '

At this moment,, can think circular arc AB=circular arc AB ' when central angle φ hour of circular arc AB, thereby, can derive following formula 19 from above-mentioned formula 17, formula 18:

[formula 19]

${\mathrm{\&phi;}}^{\&prime;}=\frac{\mathrm{\&rho;}}{{\mathrm{\&rho;}}^{\&prime;}}\&times;\mathrm{\&phi;}$

In addition, as shown in Figure 12, between the turning radius ε of rotary vortex body 10 and radius of curvature ρ, ρ ', there is the relation shown in following formula 20, thereby, can obtain following formula 21 by formula 19, formula 20:

[formula 20] [formula 21]

ρ′＝ρ+ε； ${\mathrm{\&phi;}}^{\&prime;}=\frac{\mathrm{\&rho;}}{\mathrm{\&rho;}+\mathrm{\&epsiv;}}\&times;\mathrm{\&phi;}$

In addition, the length of establishing line segment OB ' is L, then at the length L of radius of curvature ρ, the line segment OB ' of circular arc AB and length (the gap size S of line segment BB ' _Max) between, following formula 22 is set up:

[formula 22]

L＝ρ+S _max

In addition, by the center O of circular arc AB, the center O of circular arc AB ' ' and triangle OO ' B ' of forming of some B ' in, line segment OO '=ε, line segment O ' B '=ρ ', angle OO ' B '=φ ', therefore, use second law of cosine by triangle OO ' B ' and can obtain following formula 23:

[formula 23]

L ₂＝ε ²+ρ′ ²-2×ε×ρ′×cosφ′

And, above-mentioned formula 20, formula 21 and this formula 23 of formula 22 substitutions can be derived following formula 24, following formula 24 distortion can be drawn following formula 25

[formula 24]

${(\mathrm{\&rho;}+S_{\max })}^2={\mathrm{\&epsiv;}}^2+{(\mathrm{\&rho;}+\mathrm{\&epsiv;})}^2-2\&times;\mathrm{\&epsiv;}\&times;(\mathrm{\&rho;}+\mathrm{\&epsiv;})\&times;\cos (\frac{\mathrm{\&rho;}}{\mathrm{\&rho;}+\mathrm{\&epsiv;}}\&times;\mathrm{\&phi;})$

[formula 25]

$\mathrm{\&phi;}=(1+\frac{\mathrm{\&epsiv;}}{\mathrm{\&rho;}})\&times;{\cos }^{-1}\left(\frac{2\&times;{\mathrm{\&epsiv;}}^2+2\&times;\mathrm{\&rho;}\&times;(\mathrm{\&epsiv;}-S_{\max })-{\mathrm{<figure-callout\; id="2"\; label="S\; max"\; filenames="C20041006293800321.png,C20041006293800331.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\max }^{}}{2\&times;\mathrm{\&epsiv;}\&times;(\mathrm{\&rho;}+\mathrm{\&epsiv;})}\right)$

In addition, the central angle φ of circular arc AB is 1/2nd of angle BOB (that is, the angle α of each radial outside projection 14), and therefore, following formula 26 is set up:

[formula 26]

α＝2×φ

Thereby, utilize angle α that above-mentioned formula 25,24 can derive each radial outside projection 14 and projection 14 to leave the gap size S of relative clinch 3 farthest the time _MaxRelation shown in following formula 27:

[formula 27]

$\mathrm{\&alpha;}=2\&times;(1+\frac{\mathrm{\&epsiv;}}{\mathrm{\&rho;}})\&times;{\cos }^{-1}\left(\frac{2\&times;{\mathrm{\&epsiv;}}^2+2\&times;\mathrm{\&rho;}\&times;(\mathrm{\&epsiv;}-S_{\max })-{\mathrm{<figure-callout\; id="2"\; label="S\; max"\; filenames="C20041006293800321.png,C20041006293800331.png"\; state="\{\{state\}\}">S</figure-callout>}}_{\max }^{}}{2\&times;\mathrm{\&epsiv;}\&times;(\mathrm{\&rho;}+\mathrm{\&epsiv;})}\right)$

And, by the gap size S of these formula 27 expressions _MaxWith the relation of angle [alpha], as shown in figure 13, gap size S _MaxIncreasing angle [alpha] more increases more.Therefore, when with gap size S _MaxDuring for the CLV ceiling limit value of above-mentioned formula 16 expressions, can obtain the CLV ceiling limit value α of angle [alpha] _MaxThereby, by with the gap size S in the above-mentioned formula 27 _MaxBe replaced as gap size S ', can derive the CLV ceiling limit value α of the angle [alpha] that satisfies above-mentioned formula 16 _Max, as following formula 28:

${\mathrm{\&alpha;}}_{\max }=2\&times;(1+\frac{\mathrm{\&epsiv;}}{\mathrm{\&rho;}})\&times;{\cos }^{-1}\left(\frac{2\&times;{\mathrm{\&epsiv;}}^2+2\&times;\mathrm{\&rho;}\&times;(\mathrm{\&epsiv;}-S^{\&prime;})-S^{\&prime;2}}{2\&times;\mathrm{\&epsiv;}\&times;(\mathrm{\&rho;}+\mathrm{\&epsiv;})}\right)$

At this, if explanation CLV ceiling limit value α _MaxOccurrence, for example as can be seen from Figure 3, be the position of 20mm, when the height h that forms projection is 0.03mm, in order to make gap size S at the radius of curvature ρ ' of relative clinch 3 _MaxLess than this height h, set angle α for example less than about 13 ° just passable, that is, at this moment, the CLV ceiling limit value α of angle [alpha] _MaxApproximate 13 °.In addition, when the height h that forms projection 14 is 0.12mm, as long as set angle α less than about 26 ° just passable, CLV ceiling limit value α as can be known _Max Equal 26 °.

Like this, the structure that forms at present embodiment is set at the angle α of adjacent radial outside projection 14 than the CLV ceiling limit value α that uses above-mentioned formula 16 (formula 28 specifically) decision _MaxLittle angle.Like this, when clinch 12 at any position beyond the projection 14 during the most approaching relative clinch 3, can remain on gap size S (the gap size S that the position of projection 14 forms _OKDeng) less than at the above-mentioned gap size (the gap size S ' among Figure 10 etc.) that forms near the position, can bring into play tortuous sealing effect in the position of projection 14, improve sealing.

In addition, about each the radially inner side projection 13 on the inner peripheral surface 12A that is arranged on clinch 12, the CLV ceiling limit value α of the angle α of neighboring projection 13 _MaxWith lower limit α _MinAlso set substantially with above-mentioned radial outside projection 14 the samely.

The scroll type air compressor of making according to present embodiment has above-mentioned structure, below, the action of this scroll type air compressor is described.

At first, driving live axle 8 by power sources such as motor (not illustrating) rotates, rotary vortex body 10 prevents autorotation by preventing that free-wheeling system is in, the axis 01-01 that carries out with live axle 8 is that the center turning radius is rotatablely moving of ε, and the pressing chamber 15 that forms between the clinch 12 of the clinch 3 of fixing volute body 1 and rotary vortex body 10 dwindles continuously.Like this, be compressed successively at each pressing chamber 15 on one side from suction port 6 inhaled airs of fixing volute body 1, from the fixedly exhaust port 7 of volute body 1 as pressurized air be discharged to the storage tank of outside in (do not illustrate) on one side.

As mentioned above,, establish a plurality of radially inner side projections 13, a plurality of radial outside projections 14 also are set on its outer circumferential face 12B at the inner peripheral surface 12A of the clinch 12 of rotary vortex body 10 according to present embodiment.And radially inner side projection 13, radial outside projection 14 forms that top 13A, 14A amplitude are narrow, the cross section of concaved circular cambered surface 13B, 14B amplitude broad is a general triangular; The concaved circular cambered surface 13B, the 14B that form spill connect inner peripheral surface 12A, the outer circumferential face 12B of top 13A, 14A and clinch 12 sleekly.

Thereby radially inner side projection 13, radial outside projection 14 can be connected with inner peripheral surface 12A, the outer circumferential face 12B of clinch 12 by concaved circular cambered surface 13B, 14B sleekly from top 13A, 14A.Thus, can prevent that stress from concentrating and improve the intensity of top 13A, 14A, in addition, for example can use instrument such as end mill easily to process.And then radially inner side projection 13, radial outside projection 14 form the cross section of general triangular, therefore can obtain high strength.

As a result, radially inner side projection 13, radial outside projection 14 can improve the damage that relatively caused by contact, vibration, aging etc. rigidity all the year round, therefore, improve durability, reliability.

And, top 13A, 14A that radially inner side projection 13, radial outside projection 14 form in a narrow margin.Therefore, when contacting relative clinch 3, can make this top 13A, the easy blunt of 14A or abrasion.Like this, it is just can break-in good that top 13A, the 14A of radially inner side projection 13, radial outside projection 14 do not need to contact with clinch 3 how many times, therefore, can prevent power loss, noise, snap-in etc.

In addition, set the angle α of projection 13,14 at α _Max＞α 〉=α _MinScope in, set its lower limit and will satisfy as shown in the above-mentioned formula 14 ${\mathrm{\&alpha;}}_{\min }=2\&times;\left\{\sqrt{(T/2\&times;h)}\right\}/\mathrm{\&rho;}.$ Thus, when the former material of cutting rotary vortex body 10 forms clinch 12, just can use of inner peripheral surface 12A and the outer circumferential face 12B cutting of cutting tool 16 such as end mill along clinch 12, and, at this moment, only need along two side face 12A, 12B cutting just fast cutting one-tenth in former material inner peripheral surface 12A and the bottom surface sections between the outer circumferential face 12B.

Its result, when making compressor, only just can form the clinch 12 of spiral type efficiently by minimum cutting, in addition, can in cutting process, also shape together each projection 13,14, thereby, can enough short time easily form rotary vortex body 10, can enhance productivity.

Another face, the CLV ceiling limit value α of angle [alpha] _MaxIn following ranges, set, promptly, when side face 3B, the 12A (perhaps 3A, 12B) of the clinch 3,12 of each volute body 1,10 near the time, this satisfies the such scope of S '＞S shown in the above-mentioned formula 16 near the gap size S ' at position and a little gap size S clipping in the gap size that forms between the adjacent projection in this immediate position 13 (perhaps projection 14) and the relative clinch 3.Like this, even for example clinch 12 is in the occasion of the most approaching relative clinch 3 of the intermediate portion A of each projection 13 (or projection 14), also can make the gap size S that forms in the position of projection 13,14 less than at this gap size S ' that forms, can positively bring into play tortuous sealing effect in the position of projection 13,14 near the position.

Thereby clinch 12 comprises projection 13,14, during the most approaching relative clinch 3, also always can both keep the gap between the clinch 3,12 little at any position, thus, can improve each pressing chamber 15 sealing, improve the performance of compressor.

In addition, the size of space T that sets the radial direction of the radius of curvature R of concaved circular cambered surface 13B, 14B of radially inner side projection 13, radial outside projection 14 and clinch 12 is the relation more than 1/4 times, below 1 times as shown in Equation 2, it is desirable to the relation more than 2/5 times, below 3/5 times as shown in Equation 3.Thereby, can use, the inner peripheral surface 12A of cutting clinch 12, the cutting tools such as end mill of outer circumferential face 12B form radially inner side projection 13, radial outside projection 14, and machining operation can boost productivity, realize reducing cost easily.

In addition, set the amplitude W of the projection integral body of radially inner side projection 13, radial outside projection 14 ₂Be the amplitude W of top 13A, 14A as shown in Equation 4 ₁More than 2 times.Thereby, can form the root of radially inner side projection 13, radial outside projection 14 enough widely, can further improve intensity.

In addition, set radially inner side projection 13, the top 13A of radial outside projection 14, the amplitude W of 14A ₁More than the 0mm, below the 2mm, it is desirable to as shown in Equation 6 below the above 0.3mm of 0.1mm as shown in Equation 5.Thereby, when the relative clinch 3 of top 13A, 14A contact, blunt or abrasion easily, therefore, it is several times just can break-in good need not contact clinch 3, can positively prevent power loss, noise, snap-in etc.

Another face for example sets adjacent radially inner side projection 13, radial outside projection 14 with 4～26 ° angle [alpha], and the interval P of scrollwork direction that just forms clinch 12 is narrow, wide at radial outside at radially inner side.Like this, the position of the side direction inboard of the clinch 3 little for radius of curvature, that bending is big, also the radially inner side projection 13 that scrollwork direction size of space P can be narrowed down, radial outside projection 14 closely dispose along outer circumferential face 3B, the inner peripheral surface 3A of clinch 3, can improve the sealing of pressing chamber 15, improve compression performance.

In addition, forming radially inner side projection 13, radial outside projection 14 except that the position from the position of coiling top volume half-turn among the scrollwork direction total length of clinch 12, therefore, can this radially inner side projection 13, radial outside projection 14 be set a part, machining operation is simplified in necessity.

And then, the gap size S between the top 13A of radially inner side projection 13 and the outer circumferential face 3B of clinch 3 ₁And the gap size S between the inner peripheral surface 3A of the top 14A of radial outside projection 14 and clinch 3 ₂As shown in Equation 8, setting has S ₁＜S ₂Relation, like this, when between clinch 3,12, coming in contact, radially inner side projection 13 on the clinch 12 that is located at rotary vortex body 10 is contacted earlier with the outer circumferential face 3B of the fixing clinch 3 of volute body 1, therefore, can make rotary vortex body 10 is that fulcrum rotates in the direction identical with the direction of rotation power with the contact position, can prevent that free-wheeling system (not illustrating) etc. from rocking, and can improve compression performance.

In addition, in the above-described embodiments illustration outer circumferential face 3B, the inner peripheral surface 3A of the clinch 3 relative with this projection 13,14 of inner peripheral surface 12A, the outer circumferential face 12B of the clinch 12 that projection 13,14 is set are the examples that on whole, do not have the even surface of projection, but, be not limited to this, on relative clinch 3, also can establish projection.When establishing projection on this relative clinch 3, the outer circumferential face, the inner peripheral surface formation that need only the part that each projection is relative do not have the even surface of projection just passable yet.

Below, Figure 14～Figure 20 represents that according to the second embodiment of the present invention feature of present embodiment is only to constitute leaving the structure that forms each projection of clinch on the axial part of end plates.In addition, at present embodiment additional identical symbol on the structure division identical, and omit its explanation with above-mentioned first embodiment.

The 21st, the fixedly volute body of scroll type air compressor, should be fixedly volute body 21 as Figure 14, shown in Figure 15, with first embodiment substantially in the same manner by the end plates 22 of circular plate type roughly, on the surface of these end plates 22 axially uprightly clinch 23, tube portion 24, the flange part formations such as (not illustrating) of the spiral type of setting.

In addition, the inner peripheral surface 23A of clinch 23 forms does not have concavo-convex level and smooth flexure plane, and fixed side radial outside projection 31 described later is set on the outer circumferential face 23B of clinch 23.And then, as Figure 17, shown in Figure 180, the groove 23C of コ i section is set at the tooth top of clinch 23, in this groove 23C, be bumped into the Stamping Steel Ribbon 25 of spiral type.And the surface elasticity ground sliding contact of the end plates 27 of Stamping Steel Ribbon 25 and rotary vortex body 26 described later prevents that pressurized air from leaking.

The 26th, the rotary vortex body that is oppositely arranged with fixing volute body 21, this rotary vortex body 26 is as Figure 15, shown in Figure 180, is made of the clinch 28 of the end plates 27 of circular plate type and the spiral type that axially uprightly is provided with from the surface of these end plates 27 substantially in the same manner substantially with first embodiment.

Here, the inner peripheral surface 28A of clinch 28 forms does not have concavo-convex level and smooth flexure plane, rotary side radially outwardly projecting described later is set on the outer circumferential face 28B of clinch 28 plays 34.And then, at the tooth top of clinch 28 the groove 28C of コ shape section is set, in this groove 28C, be bumped into Stamping Steel Ribbon 29.And, Stamping Steel Ribbon 29 and the fixedly surface elasticity ground sliding contact of the end plates 22 of volute body 21.In addition, form a plurality of pressing chambers 30 between the clinch 23,28 of fixedly volute body 21 and rotary vortex body 26, these pressing chambers 30 can keep the high-seal state by the radial outside projection 31,34 of clinch 23,28.

The 31 fixed side radially outwardly projectings that are provided in a side of many projections of conduct on the outer circumferential face 23B of the fixing clinch 23 of volute body 21 rise, this each fixed side radially outwardly projecting plays 31, as Figure 15～protuberance that forms section shape shown in Figure 19 with general triangular, outstanding from the outer circumferential face 23B radius vector direction outside of clinch 23, axially extend simultaneously.In addition, said axially the extension just do not extended (tilt angle is 0 °) on the direction parallel with axle, for example, also comprise along the direction of ± 10～20 ° of axle inclinations is extended.

In addition, the fixed side radially outwardly projecting plays 31 tooth tops from clinch 23 and extends to axial neutral position to tooth root, and only the axle direction in clinch 23 leaves the tooth top side formation of end plates 22.Another face plays the slot part 32 that forms between 31 than outer circumferential face 23B depression at each fixed side radially outwardly projecting of the tooth top side of clinch 23.And, be arranged in clinch 23 outer circumferential face 23B the tooth root side part (remove the fixed side radially outwardly projecting rise 31 and the part of slot part 32) form and do not have concavo-convex level and smooth flexure plane.

In addition, from cross section shown in Figure 16, the fixed side radially outwardly projecting plays 31 and is formed with domatic concaved circular cambered surface 31B, the 31B in the left and right sides that becomes the outer circumferential face 23B that is connected this top 31A and clinch 23 sleekly by in a narrow margin top 31A.At this moment, set the amplitude W of top 31A with first embodiment roughly the samely ₁, each concaved circular cambered surface 31B width W ₂To satisfy above-mentioned formula 2～formula 6 with size of space T (with reference to Fig. 3) of the radial direction of radius of curvature R, clinch 23 etc.

In addition, rose 31 o'clock at each fixed side radially outwardly projecting of formation, for example, with the part between each projection 31 of will becoming among the outer circumferential face 23B of clinch 23, become flute profile from the tooth top of clinch 23 to axial neutral position cutting, cut position as slot part 32 with this, so, the position between each slot part 32 is formed projection 31.Therefore, the same curved surface that the outer circumferential face 23B (the outer circumferential face 23B between each projection 31 and end plates 22) that has removed the clinch 23 of each fixed side radial outside projection 31 and slot part 32 just becomes and the top end (top 31A) of these projections 31 extends continuously.

In addition, shown in Figure 20 (C), forming the fixed side radially outwardly projecting and play 31 top 31A, be δ across gap size at the closing position of pressing chamber 30 ₁The gap relative with the stepped part 36 of clinch 28 described later; Simultaneously, form the fixed side radially outwardly projecting and play 31 slot part 32, making the closing position at pressing chamber 30 is δ across gap size ₂The gap relative with the stepped part 36 of clinch 28.And then, form the outer circumferential face 23B of the tooth root side of clinch 23, between the closing position of pressing chamber 30, be δ across gap size ₃The gap relative with the inner peripheral surface 28A of clinch 28.And, the gap size δ of setting outer circumferential face 23B and inner peripheral surface 28A ₃Less than gap size δ ₂, greater than gap size δ ₁(δ ₁＜δ ₃＜δ ₂).

33 are arranged on the fixedly stepped part of the tooth root side of the clinch 23 of volute body 21, form this stepped part 33 than the tooth top side amplitude broad of clinch 23, towards the outstanding size t of outer circumferential face 28B of the clinch 28 of the rotary vortex body 26 relative with inner peripheral surface 23A.And stepped part 33 has with the rotary side radially outwardly projecting of clinch 28 described later and plays 34 identical length, and axially extends, and rises 34 relative with the rotary side radially outwardly projecting.

The 34 rotary side radially outwardly projectings that are arranged on a plurality of projections of conduct on the outer circumferential face 28B of clinch 28 of rotary vortex body 26 rise, this each rotary side radially outwardly projecting plays the 34 inner peripheral surface 23A (stepped part 33) at the clinch 23 of the most approaching fixedly volute body 21 of closing position of each pressing chamber 30, thus, can reduce gap between the outer circumferential face 28B of the inner peripheral surface 23A of clinch 23 and clinch 28.

In addition, the rotary side radially outwardly projecting rise 34 and the fixed side radially outwardly projecting rise 31 roughly the same, extend to axial neutral position from the tooth top of clinch 28 to tooth root, only the axial tooth top side of leaving from end plates in clinch 28 forms, and forms slot part 35 simultaneously between each fixed side radially outwardly projecting plays 31.And, tooth root side among the outer circumferential face 28B of clinch 28 part (remove the rotary side radially outwardly projecting rise 34 and the part of groove 35) form and do not have concavo-convex level and smooth flexure plane.

In addition, the rotary side radially outwardly projecting plays 34 and rises 31 roughly the samely with the fixed side radially outwardly projecting, for example has the transverse shape of general triangular, has simultaneously with the fixed side radially outwardly projecting and plays 31 identical substantially shape and size (amplitude W ₁, W ₂, radius of curvature R etc.), form.Like this, at the closing position of pressing chamber 30, for example, rise at the rotary side radially outwardly projecting between the stepped part 33 of 34 top and clinch 23 and form gap size δ ₁, between slot part 35 and stepped part 33, form gap size δ ₂, simultaneously between the inner peripheral surface 23A of the outer circumferential face 28B of clinch 28 and clinch 23, form gap size δ ₃

36 are arranged on the stepped part of tooth root side of the clinch 28 of rotary vortex body 26, much the same with the stepped part 33 of clinch 23, form the tooth top side amplitude broad of this stepped part 36 than clinch 28, towards be relatively fixed the only outstanding size t of outer circumferential face 23B of clinch 23 of volute body 21 of inner peripheral surface 28A.And stepped part 36 has with the fixed side radially outwardly projecting of clinch 23 and plays 31 identical length, extends vertically, rises 31 relative with the fixed side radially outwardly projecting.

Scroll type air compressor according to the present embodiment manufacturing has as above-mentioned structure, below its action of explanation.

At first, when 21 rotations of rotary vortex body 26 relative fixed volute bodies, closing position at each pressing chamber 30, fixedly the radially outwardly projecting of volute body 21 sides plays 31 near the inner peripheral surface 28A (stepped part 36) of the clinch 28 of rotary vortex body 26, in addition, the radially outwardly projecting of rotary vortex body 26 sides plays the inner peripheral surface 23A (stepped part 33) of the clinch 23 of 34 the most approaching fixedly volute bodies 21, thereby, play 31,34 tortuous sealing effect by these radially outwardly projectings and can in pressing chamber 30, enclose air, can improve pressing chamber sealing, improve compression performance.

Here, shown in first comparative example of Figure 20 (a), on the clinch 104 of the clinch 102 of fixing volute body 101 and rotary vortex body 103, the radially outwardly projecting time-out is not set,, between clinch 102,104, can forms the δ that is spaced apart that prevents minimum that both contact at closing position ₃The gap.

In addition, shown in second comparative example of Figure 20 (b), when on outer circumferential face 102B, the 104B of each clinch 102,104, passing through entire axial length and radially outwardly projecting is set plays 105,106, the gap between inner peripheral surface 104A, the 102A of the top of radial outside projection 105,106 and relative clinch 104,102 can be set at gap size δ than first comparative example ₃Also little gap size δ ₁But, being accompanied by radially outwardly projecting and playing 105,106 formation, the gap of removing between inner peripheral surface 104A, the 102A that radially outwardly projecting plays 105,106 outer circumferential face 102B, 104B and relative clinch 104,104 becomes the ratio gap dimension delta ₃Also big gap size δ ₂, therefore, just the problem of average radial gap increase is arranged as a whole.

To this, at the present embodiment shown in Figure 20 (c), at outer circumferential face 23B, the 28B of clinch 23,28, only form radially outwardly projecting and play 31,34 in the tooth top side, the while forms the stepped part 36,33 of only outstanding t on the tooth root side of inner peripheral surface 28A, the 23A of relative clinch 28,23.Therefore, the tooth top side radially outwardly projecting can be risen 31,34 and stepped part 36,33 between the gap be set at the gap size δ that equates with second comparative example ₁, simultaneously, the gap between outer circumferential face 23B, 28B and inner peripheral surface 28A, the 23A can be set at the gap size δ that equates with first comparative example in the tooth root side ₃As a result, compare, can reduce the average radial gap, can improve compression efficiency with second comparative example.

Like this, at present embodiment, because only an axial part of leaving from end plates 22,27 in clinch 23,28 forms radially outwardly projecting 31,34, play 31,34 axial length so can shorten radially outwardly projecting, can reduce the abnormal sound that causes by projection 31,34.

In addition, compare with second comparative example, because the axle direction of clinch 23,28 reduces the slot part 32,35 between the adjacent projection 31,34 relatively, so can reduce the average radial gap between the clinch 28 of the clinch 23 of fixing volute body 21 and rotary vortex body 26, can improve compressibility.And then, improve compressibility and just can reduce the interior temperature of clinch 23,28, therefore, just can prolong the life-span of Stamping Steel Ribbon 25,29 etc.

In addition, because in the tooth root side, the size of space δ the when gap between inner peripheral surface 28A, the 23A of outer circumferential face 23B, the 28B of clinch 23,28 and relative clinch 28,23 can be set at and not establish projection with first comparative example ₃Identical, so can prevent contact, improve reliability at this position clinch 23,28.

Especially,, only on the tooth top part of clinch 23,28, form radially outwardly projecting and play 31,34, therefore, can play 31,34 by a tooth top portion configuration radially outwardly projecting that thermal distortion takes place significantly at clinch 23,28 at present embodiment.As a result, can prevent the snap-in that thermal distortion causes, it is 31,34 the most approaching or contact relative clinch 28,23 that radially outwardly projecting is risen, and can further improve compression efficiency.

In addition, in the tooth root side of clinch 23,28 radially outwardly projecting is not set and plays 31,34, with remove each fixed side radially outwardly projecting rise 31 and the outer circumferential face 23B of the clinch 23 of slot part 32 and the top end (top 31A) of projection 31 form same curved surface, thereby, in the clinch entire axial length projection being set like that with second comparative example compares, can reduce cutting clinch 23,28 the position, can cut down finished cost, can carry out simultaneously the control of tooth root side dimensional accuracy easily.

In addition, on the clinch 23 of fixing volute body 21, the fixed side radially outwardly projecting is set and plays 31, on the clinch 28 of rotary side volute body 26, the rotary side radially outwardly projecting is set and plays 34, thereby, can make these radially outwardly projectings play level and smooth inner peripheral surface 28A, the 23A (stepped part 33,36) of 31,34 the most approaching relative clinchs 28,23, can prevent contacting between projection and the projection, snap-in etc.

In addition, be identically formed radially outwardly projecting substantially with first embodiment's projection 13,14 and play 31,34 amplitude W ₁, W ₂With radius of curvature R etc., thereby, can access the action effect identical with first embodiment.

Below, Figure 21 represents the third embodiment of the present invention, present embodiment is characterised in that the radial outside at clinch is provided with non-projection formation position.In addition, at present embodiment additional identical symbol on the structure division identical, and omit its explanation with first embodiment.

The 41st, the fixedly volute body of scroll type air compressor, identical substantially with first embodiment, should be fixedly volute body 41 by end plates 42, clinch 43, tube portion 44, flange part formations such as (not illustrating), and clinch 43 formation have the spiral type of inner peripheral surface 43A and outer circumferential face 43B.

Yet, many fixed side radially outwardly projectings that are arranged on axial total length extension on the outer circumferential face 43B of clinch 43 play 45, simultaneously, setting does not form the fixed side radially outwardly projecting and plays 45 non-projection formation position 43C on the radial outside (end of volume (EOV) is distolateral) of clinch 43.And non-projection forms position 43C, for example have from the radial outside end of clinch 43 to the length of radially inner side volume one circle, and be configured in the pressing chamber 15 that becomes the radial outside in the clinch 43 ', 15 " the position of perisporium.

The 46th, with the fixing rotary vortex body of volute body 41 relative configurations, identical substantially with first embodiment, this rotary vortex body 46 has the clinch 47 that uprightly is arranged on the spiral type on the end plates (not having mapping), and this clinch 47 has inner peripheral surface 47A and outer circumferential face 47B.

In addition, the rotary side radially outwardly projecting that is arranged on the entire axial length extension on the outer circumferential face 47B of clinch 47 plays 48, simultaneously, with the clinch 43 of fixing volute body 41 substantially in the same manner on the radial outside (end of volume (EOV) is distolateral) of clinch 47, be positioned at the radial outside setting and do not form the rotary side radially outwardly projecting and play 48 non-projection and form position 47C.And non-projection forms position 47C, for example has from the radial outside end of clinch 47 to roll up the length of an about circle half to radially inner side, and is configured in the pressing chamber 15,15 of the radial outside that becomes clinch 47 " the position of perisporium.

At this, the position K that the position of the clinch 43 of the end of volume (EOV) the most approaching distolateral fixedly volute body 41 of the clinch 47 of rotary vortex body 46 is compressed to start with, position K by this compression beginning, radial outside by clinch 43,47 form two pressing chambers 15 (pressing chamber 15 of radial outside ', 15 "); the pressing chamber 15 of these radial outsides ', 15 ", just become the state that is closed at once from suction port 6 inhaled airs.

And, at present embodiment, in clinch in the face of the pressing chamber 15 of radial outside ', 15 " the position on set the non-projection formation 43C of portion, 47C.Therefore, when compressor operation, the pressing chamber 15 of radial outside ', 15 " the position, the clinch 47 that can make the clinch 43 of fixing volute body 41 and rotary vortex body 46 is overlap joint smoothly continuously.

Like this, at present embodiment, be formed on and establish non-projection on the position of the about circle that is positioned at radial outside in the clinch 43 of fixing volute body 41 and form position 43C, on the position of the about circle half of radial outside of the clinch 47 of rotary vortex body 46, non-projection be set and form the such structure of position 47C, thereby, can remain on well the pressing chamber 15 of beginning compression position K ' sealing and the pressing chamber 15 that adjoins with pressing chamber 15 " sealing.

Thereby, the pressing chamber 15 that volume change influence when relative compression is big ', 15 " stably pressurized air, can improve compression performance; simultaneously, can prevent abnormal sound that projection 45,48 causes by suction port 6 to external leaks, can reduce noise.

In addition, for example understand in above-mentioned first embodiment on the inner peripheral surface 12A of the clinch 12 that is constituting rotary vortex body 10 radially inner side projection 13 is set, the embodiment of radial outside projection 14 is set on the outer circumferential face 12B of clinch 12.But the present invention is not limited to this, for example also can form the such structure of first variation as shown in figure 22.At this moment, on the inner peripheral surface 3A of the fixing clinch 3 of volute body 1, establish fixed side radially inner process 51, on outer circumferential face 3B, establish the fixed side radially outwardly projecting and play 52.

In addition, in the present invention, for example, also can form the structure of second variation as shown in figure 23.At this moment, can radially on inner process 51, the inner peripheral surface 12A radially inner process 53 of rotary side be set in that fixed side is set on the inner peripheral surface 3A of the fixing clinch 3 of volute body 1 at the clinch 12 of rotary vortex body 10.

In addition, in first embodiment, concaved circular cambered surface 13B, the 14B of projection 13,14 formed spread all over whole domatic concave curvatures.But the present invention is not limited to such structure, as long as the formation of the part that is connected with the side face of clinch in projection domatic concave curvatures is just passable, for example can form the such structure of the 3rd variation as shown in figure 24.At this moment, radial outside projection 14 ' in the outer circumferential face 12B that connects top 14A ' and clinch 12 domatic, form concave curvatures (concaved circular cambered surface) 14B ' though connect the part of outer circumferential face 12B, form convex surface 14C ' in part near top 14A '.

In addition, the radial outside projection 14 that is provided with on radially inner side projection 13 that is provided with on first embodiment for example understands inner peripheral surface 12A at the clinch 12 of rotary vortex body 10 and the outer circumferential face 12B has the structure of angle α arranged spaced on sense of rotation.But the present invention is not limited to this structure, for example, also can form the angle configuration that radially inner side projection 13 and radial outside projection 14 is had 20 ° respectively, and this radially inner side projection 13 and radial outside projection 14 are interlaced 10 ° mutually in sense of rotation, form the structure that radially inner side projection 1 and radial outside projection 14 stagger and dispose.

In addition, present embodiment is for example understood the scroll type air compressor of fixedly volute body 1 rotation of rotary vortex body 10 relative fixed on housing, but the present invention is not limited to this, for example the spy opens shown in the flat 9-133087 communique, also is applicable to drive two all system rotary type scroll fluid machines of the turbine rotation of configuration relative to each other respectively.

And then, for example understand the occasion be applied to as the scroll type air compressor of convolute-hydrodynamic mechanics in an embodiment, still, the present invention is not limited to this, also can be applied to other the convolute-hydrodynamic mechanics such as coolant compressor of compressed refrigerant.

Claims (15)

1. convolute-hydrodynamic mechanics, it has: first volute body that uprightly is provided with, is rolled into to radial outside from radially inner side the clinch of spiral type on end plates vertically; With end plates that this volute body is oppositely arranged on uprightly be provided with vertically be used for overlapping with the clinch of this first volute body and form a plurality of pressing chambers, be rolled into another volute body of the clinch of spiral type to radial outside from radially inner side, it is characterized in that: on the side face of the clinch of above-mentioned first volute body, be arranged on the scrollwork direction at least and have at interval, along axially extended many projections; The shape of the cross section of this each projection is that top and the domatic of above-mentioned side face that will connect projection form as concave curved surface; And the scope of the angle α of neighboring projection is set at: at the height when above-mentioned projection is that the radius of curvature of the above-mentioned side face at h, the position that forms above-mentioned projection is the size of space of the inner peripheral surface of ρ, relative above-mentioned clinch and the radial direction between the outer circumferential face when being T, the lower limit α of above-mentioned angle α _MinBe set at

${\mathrm{\&alpha;}}_{\min }=\frac{2\sqrt{(T/2)\&times;h}}{\mathrm{\&rho;}};$

The side face of the clinch that is in clinch side face between the adjacent projection of above-mentioned first volute body and above-mentioned another volute body near the time gap size be S ', clip the side face of above-mentioned immediate clinch of above-mentioned first volute body and when any little gap size is S among the gap between the clinch side face of the top of adjacent above-mentioned projection and above-mentioned another volute body, the CLV ceiling limit value α of above-mentioned angle α _Max, be set in the scope that satisfies S '＞S; And making the side face of the clinch relative with above-mentioned each projection is even surface.

2. convolute-hydrodynamic mechanics as claimed in claim 1 is characterized in that the concave curvatures of above-mentioned projection forms concaved circular cambered surface.

3. as claim 1 or 2 described convolute-hydrodynamic mechanics, it is characterized in that the interval T of the radius of curvature R of the concave curvatures of above-mentioned projection and clinch radial direction has the relation of 1/4T≤R.

4. as claim 1 or 2 described convolute-hydrodynamic mechanics, it is characterized in that, form above-mentioned projection, make above-mentioned projection top width W ₁With above-mentioned projection integral width W ₂Has W ₁* 2≤W ₂Relation.

5. convolute-hydrodynamic mechanics as claimed in claim 1 is characterized in that, form above-mentioned each projection narrow at the interval of scrollwork direction P at radially inner side, in the wide structure of radial outside.

6. as claim 1,2 or 5 described convolute-hydrodynamic mechanics, it is characterized in that, form the structure that above-mentioned projection only is set on above-mentioned first volute body clinch, relative with another volute body clinch inner peripheral surface and any one side face among the outer circumferential face.

7. as claim 1,2 or 5 described convolute-hydrodynamic mechanics, it is characterized in that, above-mentioned each projection forms on the inner peripheral surface and outer circumferential face of the clinch that is arranged on first volute body, be arranged on the inner peripheral surface of clinch of the inner peripheral surface of clinch of first volute body and another volute body, be arranged on the outer circumferential face of clinch of the outer circumferential face of clinch of first volute body and another volute body among any.

8. as claim 1,2 or 5 described convolute-hydrodynamic mechanics, it is characterized in that, form the width W at the top of above-mentioned projection ₁Be 0mm≤W ₁≤ 2mm.

9. as claim 1,2 or 5 described convolute-hydrodynamic mechanics, it is characterized in that, when the top of above-mentioned projection during near the side face of relative clinch, the gap size S of interior all sides ₁Gap size S with outer circumferential side ₂Has S ₁＜S ₂Relation.

10. as claim 1,2 or 5 described convolute-hydrodynamic mechanics, it is characterized in that, be formed on the structure that above-mentioned projection is set on the radially the most inboard position of removing above-mentioned clinch.

11. convolute-hydrodynamic mechanics as claimed in claim 1 is characterized in that, the height h that forms above-mentioned projection is in the scope of 0.12mm 〉=h 〉=0.03mm.

12., it is characterized in that only the axial part of leaving from these end plates in the clinch on uprightly being arranged on above-mentioned end plates forms each projection as claim 1,2,5 or 11 described convolute-hydrodynamic mechanics.

13. as claim 1,2,5 or 11 described convolute-hydrodynamic mechanics, it is characterized in that, only the axial part of leaving from these end plates in the clinch on uprightly being arranged on above-mentioned end plates forms above-mentioned each projection, and will not form the side face of above-mentioned clinch of above-mentioned projection and the top end of above-mentioned projection forms same plane.

14., it is characterized in that as claim 1,2,5 or 11 described convolute-hydrodynamic mechanics, only in above-mentioned clinch, form above-mentioned each projection on the radially inner side of scrollwork direction, and, establish non-projection at the radial outside of above-mentioned clinch and form the position.

15. convolute-hydrodynamic mechanics as claimed in claim 14, it is characterized in that it is the whole position of roughly rolling up a circle to radially inner side in the immediate position that begins to compress of outermost radial outside from clinch and another volute body clinch of above-mentioned first volute body that the non-projection of above-mentioned clinch forms the position.

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