CN107110360B - Sealing ring - Google Patents

Abstract

It can be manufactured inexpensively by being injection moulded to provide one kind, and the sealing ring of the leakage rate of fluid can be reduced, aforementioned seal circle is by thermoplastic resin composition, it is formed integrally as the global shape for having apertured annular shape at the one of circumference, with circle main body and the 1st protrusion (21), 2nd protrusion (22), aforementioned 1st protrusion (21), 2nd protrusion (22) by from circle main body the 1st end, with the dashing forward place in the circumferential setting of 2nd end, the cross-sectional shape for enclosing main body is rectangle, the cross-sectional shape of 2nd protrusion (22) is formed triangle, and the 1st protrusion (21) have be in the inclined surface (24) on the bottom edge of the triangle of the 2nd protrusion (22) parallel shape inclination corresponding surface (23), in the gap that the 1st protrusion (21) and the 2nd protrusion (22) overlap Under closed state, the 1st protrusion (21) and the 2nd protrusion (22) are configured to not from the generally rectangular size exceeded.

Description

Sealing ring

Technical field

The present invention relates to sealing rings.

Background technique

In the past, as we all know there are such as lower seal, aforementioned seal circle have at the one of circumference have it is apertured substantially round Cricoid global shape has circle main body, from the both ends of the circle main body to circumferential 1st protrusion outstanding and the 2nd protrusion, carries out Compressor can sealing between dynamic vortex and shell, material mainly uses polytetrafluoroethylene (PTFE) (for example, referring to patent Document 1, patent document 2).

Patent document 1: Japanese Unexamined Patent Publication 2007-247526 bulletin.

Patent document 2: Japanese Unexamined Patent Publication 8-276508 bulletin.

Cylindric polytetrafluoroethylene (PTFE) raw material is mechanically sliced by previous this sealing ring first, then by cutting It cuts, grind, the machinings such as cutting off processing manufacture.

Therefore, previous sealing ring has a disadvantage that, expends the machining period of machining etc., material loss also more hair Raw, manufacturing cost is also higher.

On the other hand, it can also be manufactured, but in this case, had a disadvantage that, the 1st protrusion and the 2nd by being injection moulded Leakproofness decline at the seam areas of protrusion, the leakage rate of the fluid (oil) leaked out from the seam areas are excessive.It is tried swinging It in testing, has confirmed that compared with polytetrafluoroethylene (PTFE) sealing ring, fluid (oil) leakage rate is obviously excessive.Stream from sealing position It is undesirable that body leakage, which terrifically increases in the function of compressor,.In addition, with can dynamic vortex, shell it is flat by sealing The increase of the frictional resistance of the sliding contact surface of face sliding contact, sliding when swing become unstable, become make the 1st protrusion and The main reason for seal clearance size of the seam areas of 2nd protrusion changes, and increases the leakage rate of fluid.

Summary of the invention

Therefore, the object of the present invention is to provide a kind of sealing ring, aforementioned seal circle can be made up of thermoplastic resin The injection moulding of object is manufactured inexpensively, and can reduce the leakage rate of the fluid from seam areas.Particularly, it is therefore intended that A kind of sealing ring of compressor being suitable for carrying out eddying motion is provided.

A kind of sealing ring of the invention is formed as the global shape for having apertured annular shape at the one of circumference, has circle Main body and the 1st protrusion, the 2nd protrusion, aforementioned 1st protrusion, the 2nd protrusion by from the 1st end of the circle main body, the 2nd end in circumferential direction On be protrusively provided, whole to be integrally formed by thermoplastic resin composition, the cross-sectional shape of above-mentioned circle main body is rectangle, Above-mentioned 1st protrusion and the 2nd protrusion divide the cross section of the rectangle of above-mentioned circle main body by cut-off rule two, by the 1st corresponding surface, 2 corresponding surfaces face each other, and in turn, above-mentioned 1st protrusion is to be formed with the cross in the portion of pruning in above-mentioned 1st obverse opposite side Cross sectional shape is set to, and under the gap closed state that above-mentioned 1st protrusion and above-mentioned 2nd protrusion overlap, the above-mentioned 1st is convex The size that portion and above-mentioned 2nd protrusion do not exceed from the contour line of the cross section of above-mentioned circle main body.

In addition, a kind of sealing ring of the invention is formed as the global shape for having apertured annular shape at the one of circumference, With circle main body and the 1st protrusion, the 2nd protrusion, aforementioned 1st protrusion, the 2nd protrusion are by from the 1st end, the 2nd end of the circle main body It is protrusively provided in the circumferential, whole to be integrally formed by thermoplastic resin composition, the cross-sectional shape of above-mentioned circle main body For, by it is corresponding by the corner part of sealing surface by sealing surface and affixed side with drawer at movable side, about a generally rectangular corner be pair Above-mentioned other generally rectangular corner notch at angle form notch, and above-mentioned 1st protrusion and the 2nd protrusion will have above-mentioned notch The cross section of the above-mentioned circle main body of the cross-sectional shape in portion is divided by cut-off rule two, carrys out phase by the 1st corresponding surface, the 2nd corresponding surface It mutually faces, above-mentioned 1st protrusion is the cross section shape for pruning portion being formed with the above-mentioned notch of above-mentioned circle main body in sequential like Shape is set to, under the gap closed state that above-mentioned 1st protrusion and above-mentioned 2nd protrusion overlap, above-mentioned 1st protrusion and upper The 2nd protrusion is stated not from the above-mentioned generally rectangular size exceeded.

In addition, above-mentioned circle main body and drawer at movable side are had by the 1st sliding contact surface of sealing surface sliding contact for the resistance that rubs The shallow trough shape notch that power reduces.

In addition, above-mentioned circle main body and drawer at movable side are configured to by the 1st sliding contact surface of sealing surface sliding contact, it is by friction The low material of number covers to be formed to reduce frictional resistance.

In addition, a kind of sealing ring of the invention is formed as the global shape for having apertured annular shape at the one of circumference, With circle main body and the 1st protrusion, the 2nd protrusion, aforementioned 1st protrusion, the 2nd protrusion are by from the 1st end, the 2nd end of the circle main body It is protrusively provided in the circumferential, whole to be integrally formed by thermoplastic resin composition, the cross-sectional shape of above-mentioned circle main body For circle, above-mentioned 1st protrusion and the 2nd protrusion divide the circular cross section of above-mentioned circle main body by cut-off rule two, by the 1st pair It answers face, the 2nd corresponding surface to face each other, is set to, be closed in the gap that above-mentioned 1st protrusion and above-mentioned 2nd protrusion overlap Under state, size that above-mentioned 1st protrusion and above-mentioned 2nd protrusion do not exceed from the contour line of the cross section of above-mentioned circle main body.

In addition, a kind of sealing ring of the invention is formed as the global shape for having apertured annular shape at the one of circumference, With circle main body and the 1st protrusion, the 2nd protrusion, aforementioned 1st protrusion, the 2nd protrusion are by from the 1st end, the 2nd end of the circle main body It is protrusively provided in the circumferential, whole to be integrally formed by thermoplastic resin composition, the cross-sectional shape of above-mentioned circle main body For circle, above-mentioned 1st protrusion and the 2nd protrusion divide the circular cross section of above-mentioned circle main body by cut-off rule two, by the 1st pair Face, the 2nd corresponding surface is answered to face each other, in turn, above-mentioned 1st protrusion is to be formed with to cut in above-mentioned 1st obverse opposite side The cross-sectional shape for going to portion, is set to, under the gap closed state that above-mentioned 1st protrusion and above-mentioned 2nd protrusion overlap, on State the size that the 1st protrusion and above-mentioned 2nd protrusion do not exceed from the contour line of the cross section of above-mentioned circle main body.

In addition, the above-mentioned circle main body of above-mentioned opening-wide state is configured to, relative to the central point in above-mentioned gap, 180 ° ± There are radius of curvature it is maximum sized position in the range of 30 °, is set to, from the maximum sized position respectively to above-mentioned the 1 end, the 2nd end, with approaching in the circumferential, radius of curvature reduces, and overlaps in above-mentioned 1st protrusion and the 2nd protrusion Under the closed state of gap, global shape is in circular.

In addition, a kind of sealing ring of the invention is formed as the global shape for having apertured annular shape at the one of circumference, With circle main body and the 1st protrusion, the 2nd protrusion, aforementioned 1st protrusion, the 2nd protrusion are by from the 1st end, the 2nd end of the circle main body It is protrusively provided in the circumferential, in turn, is equipped on by two orthogonal corner parts formed by sealing surface, is crimped on above-mentioned quilt Sealing surface realizes sealing function, in addition to other than the above-mentioned sealing opposed area opposite by sealing surface of orthogonal two On non-relative region, wrong assembly, which is arranged, to be prevented from using mark.

In addition, whole be injection molded by thermoplastic resin composition, and above-mentioned accidentally assembly is prevented from being passed through with mark Above-mentioned injection moulding is integrally formed.

In addition, pruning portion side above-mentioned, the 1st protrusion breakage prevents from being dashed forward in the circumferential with the 3rd protrusion from above-mentioned 1st end It is arranged out.

Sealing ring according to the present invention can improve the leakproofness of the seam areas of the 1st protrusion and the 2nd protrusion, can subtract Small fluid leakage.It by the injection moulding of thermoplastic resin composition, can easily be sized, can be easy, inexpensively Obtain high-quality, high performance sealing ring.Can omit cutting, grinding, cutting etc. machining, the generation of material loss also compared with It is few, it can be manufactured inexpensively.Particularly, it is capable of providing the sealing ring for being appropriate for the compressor of eddying motion.

According to the present invention that accidentally assembly is prevented the sealing ring that non-relative region is set to mark, operator, which confirms, accidentally to be filled With preventing with mark, relative to by two orthogonal corner parts formed by sealing surface, can with the posture of normal sealing ring, It is assembled without mistake (fault).Also, accidentally assembly prevents from being not present in sealing opposed area with mark, completely not to sealing The functional plane (sealing performance) of circle impacts.

It is convex by the 3rd protrusion, the 1st according to the 3rd protrusion by the sealing ring pruning portion side and being protrusively provided from the 1st end Portion is protected, and sealing performance is always played consistently.That is, with circle main body integrally compared with, the 1st protrusion is minimum, with other objects Collision or when falling to the ground, due to its material, it may be said that by crack, the damaged a possibility that such as to lose higher, but The 1st minimum protrusion is protected by the 3rd protrusion of the invention, above-mentioned breakage can be prevented.

Detailed description of the invention

Fig. 1 is specifically to illustrate to be related to the compressor cross-sectional view of the purposes of sealing ring of the invention.

Fig. 2 indicates the 1st embodiment of the invention, is the enlarged cross-sectional view indicated using position.

Fig. 3 is the top view of gap opening-wide state.

Fig. 4 is the main view of (elliptically illustrating rear site portion) gap opening-wide state.

Fig. 5 is the top view of gap closed state.

Fig. 6 is the main view of gap closed state.

Fig. 7 is the enlarged cross-sectional view for indicating the variation of circle main body 1.

Fig. 8 is the B-B enlarged cross-sectional view of Fig. 4.

Fig. 9 is the C-C enlarged cross-sectional view of Fig. 4 and the enlarged cross-sectional view for indicating variation.

Figure 10 is the D-D enlarged cross-sectional view of Fig. 6 and the enlarged cross-sectional view for indicating variation.

Figure 11 is the enlarged view of a portion for indicating pressured state.

Figure 12 is the cross-sectional view for indicating the 2nd embodiment of the invention.

Figure 13 is the top view of gap closed state.

Figure 14 is mian part enlarged plan view.

Figure 15 is the top view for indicating the gap closed state of variation of the 2nd embodiment of the invention.

Figure 16 is the cross-sectional view for indicating the 3rd embodiment of the invention.

Figure 17 is the cross-sectional view for indicating the 4th embodiment of the invention.

Figure 18 is the cross-sectional view for indicating the 5th embodiment of the invention.

Figure 19 is the cross-sectional view for indicating the 6th embodiment of the invention.

Figure 20 is the cross-sectional view for indicating the 6th embodiment and the 7th embodiment.

Figure 21 is the mian part cross section explanatory diagram for illustrating various modifications example.

Figure 22 is the mian part cross section explanatory diagram for indicating another variation.

Figure 23 indicates the 8th embodiment of the invention, is the enlarged cross-sectional view indicated using position.

Figure 24 is the enlarged cross-sectional view for indicating each mian part.

Figure 25 is the enlarged cross-sectional view for indicating each mian part of the 9th embodiment.

Figure 26 is the enlarged view of a portion for indicating a variation.

Figure 27 is the enlarged view of a portion for indicating other variations.

Figure 28 is the enlarged view of a portion for indicating various other variations.

Figure 29 is the enlarged view of a portion for indicating various other other variations.

Figure 30 is the enlarged view of a portion for indicating pressured state.

Figure 31 is the enlarged view of a portion for indicating pressured state.

Figure 32 indicates the 10th embodiment of the invention, is the enlarged cross-sectional view of assembled state.

Figure 33 is the top view for indicating gap opening-wide state.

Figure 34 is the main view of (elliptically illustrating rear site portion) gap opening-wide state.

Figure 35 is the bottom view of gap closed state.

Figure 36 is the enlarged view of a portion for indicating various modifications example.

Figure 37 is the enlarged view of a portion for indicating various modifications example.

Figure 38 is the enlarged cross-sectional view for illustrating to assemble an example of (assembly) state.

Figure 39 is other the enlarged cross-sectional view for illustrating to assemble (assembly) state.

Figure 40 is the enlarged view of a portion for indicating various modifications example.

Figure 41 is the enlarged cross-sectional view for illustrating to assemble the 11st embodiment of (assembly) state.

Figure 42 is the enlarged view of a portion for further indicating that other various modifications example.

Figure 43 is the explanatory diagram for indicating the mian part of the 12nd embodiment, and Figure 43 (A) is mian part amplification cross section explanatory diagram, Figure 43 It (B) is mian part amplification perspective illustration.

Figure 44 is the enlarged view of a portion of gap closed state and the enlarged view of a portion for indicating variation.

Figure 45 is the enlarged cross-sectional view for indicating to replace the 13rd embodiment and its variation of Figure 44.

Figure 46 is the enlarged view of a portion for indicating pressured state.

Figure 47 is the cross-sectional view for indicating the 14th and the 15th embodiment of the invention.

Figure 48 is the enlarged cross-sectional view for indicating various modifications example.

Figure 49 is mian part amplification stereogram corresponding with Figure 48 (A).

Specific embodiment

Hereinafter, based on the 1st embodiment shown in fig. 1 to figure 11 and its variation, the present invention is described in detail.

As shown in Figure 3 and Figure 4, sealing ring S of the invention in a free state, at the one of circumference have gap 5 Circular global shape.Also, sealing ring S has circle main body 1, the 1st protrusion 21, the 2nd protrusion 22, aforementioned circle main body 1 Occupy the centric angle more slightly smaller than 360 °, aforementioned 1st protrusion 21, the 2nd protrusion 22 are by from the 1st end 11 and the 2nd end of circle main body 1 Portion 12 is protrusively provided in the circumferential.

Use state is indicated in fig. 1 and 2, illustrates the scroll compressor mechanism 3 for being applied to the compressor 2 of idle call The case where.

Scroll compressor mechanism 3 mainly by fixed scroll 6 and can dynamic vortex 7 etc. constitute, aforementioned fixed scroll 6 with shell 4 shell 4 top be close to mode configure, it is aforementioned can dynamic vortex 7 be engaged in fixed scroll 6.On shell 4, with it is movable It is recessed with seal groove 4B at lower surface (back side) 7A of vortex 7 opposite planar portions 4A, is incorporated with this hair on seal groove 4B Bright sealing ring S.

Sealing ring S will can seal (seal) between the back side 7A of dynamic vortex 7 and the planar portions 4A of shell 4, and it is empty to form back pressure Between.(in addition, Fig. 2 is the enlarged drawing in the portion Y of Fig. 1.)

Also, as shown in Figure 3 and Figure 4, using thermoplastic resin composition, being integrally formed gap 5 is opening-wide state Global shape.In Fig. 3, arrow F indicates the injection direction of molten resin when injection moulding, and appended drawing reference 10 is that inlet is (residual Trace) portion, that is, use (illustration omitted) cutting edge gallantly to cut off as far as possible, it is also possible to residual forms small protrusion, in order to Finishing, can also carry out the machining such as grinding.But other than the residual trace portion 10 of such inlet, machine can be omitted Tool processing, is arranged injection moulding face.

As suitable by the injection molding thermoplastic resin composition of sealing ring S of the invention, polyethersulfone resin can be lifted For (PES resin) constituent.The advantages of so-called flash is not likely to produce in injection-molded article has the following advantages in turn, Coefficient of thermal expansion is lower, and lower from the shrinkage after mold taking-up, the size of sealing ring S is also maintained high-precision, before capable of omitting The machining stated.

Also, as shown in figure 3, gap 5 is integrally formed using thermoplastic resin compositions such as polyethersulfone resin constituents In the global shape of opening-wide state, but from injection mold take out, gap 5 in opening-wide state sealing ring S circle main body 1, In The side opposite with gap 5 has radius of curvature R₁₃For maximum sized (maximum sized) position 13, also, it is set to, from The maximum sized position 13 is respectively to the 1st end 11, the 2nd end 12, in circumferential M₁、M₂It is upper close, radius of curvature R₁、 R₂Be gradually reduced, the 1st end 11, the 2nd end 12 radius of curvature R₁₁、R₁₂For minimum dimension, in turn, (for lesser prominent ruler It is very little) the 1st protrusion 21, the 2nd protrusion 22 outer peripheral surface radius of curvature and aforementioned R₁₁、R₁₂It is identical.

In addition, aforementioned radius of curvature R₁₃、R₁、R₂、R₁₁、R₁₂As shown in figure 3, being set as from central point O₁To outside circle main body 1 The size of circumferential surface.

In turn, if additional explanation, in the top view of Fig. 3, the circle main body 1 of opening-wide state is in relative to gap 5 Point (central point) P of centre₅In the range of 180 ° ± 30 °, there are maximum sized positions 13.That is, θ shown in Fig. 3 is 30 °, Maximum sized position 13 is equipped in the range of 2 θ=60 °.(in addition, in Fig. 3, L₀It is to indicate to include central point P₅It is straight The line of diameter.)

In this way, the shape of the chamber of mold, size and the sealing ring S(being taken out are referring to Fig. 3) it is set to, periphery Edge shape is following non-circular, in the range of ± θ (=± 30 °) of the opposite side of 180 ° relative to gap 5, is arranged Radius of curvature R₁₃For maximum sized position 13, it is gradually reduced from the position 13 towards 5 radius of curvature of gap.

It in use state, i.e., is assemblied in as illustrated in fig. 2 in the state of seal groove 4B, the 1st protrusion 21 and the 2nd protrusion 22 It overlaps, is in gap closed state, but is above-mentioned non-circular under the opening-wide state of gap, thus along with flexible deformation, In from central point O₁For same radius R₀Circular, the inner wall 14 of the radial outside relative to seal groove 4B as shown in Figure 2 It is in close contact.When being deformed from gap opening-wide state (Fig. 3) to gap closed state (Fig. 5), deformed, so that maximum sized The maximum curvature radius at position 13 reduces, and the 1st end 11,12 side of the 2nd end hardly deform.Therefore, as shown in Figure 5 aforementioned Radius of curvature R₀With the radius of curvature R of end 11,12 shown in Fig. 3₁₁、R₁₂It is equal.

As an example, the cross-sectional shape for enclosing main body 1 is rectangle.In the present invention, " rectangle " is defined as, it is clear that including such as Square, rectangle shown in Fig. 2, Fig. 9 (A), Figure 10 (A) etc., in turn, further include as shown in Fig. 7, Fig. 9 (B), Figure 10 (B) that Sample is from generally rectangular G by a corner 15 with skewed straight line L₁₅Carry out the shape of chamfering, though also, illustration omitted, including will be upper The polygon of part or all of smaller chamfering of progress in the remaining corner other than a corner 15 is stated, also, further includes such as figure It further include 4 as shown in Fig. 9 (C), Figure 10 (B) with the shape of shallow trough shape notch 29 shown in 12~Figure 16 and Figure 18 At least one of corner has the shape in roundlet corner (small ア ー Le portion) 35.

In use state shown in Fig. 2, there is the 1st sliding contact surface 26 and the 2nd sliding contact surface 27, the aforementioned 1st is sliding Dynamic contact surface 26 with can dynamic vortex 7 back side 7A etc. (drawer at movable side) sealed plane P₁Sliding contact, aforementioned 2nd sliding contact (affixed side) of the inner wall 14 of face 27 and seal groove 4B etc. is by sealing inner peripheral surface P₂Sliding contact.It is pushed into when being pressurized By the sealed plane P of orthogonal shape at section₁, by sealing inner peripheral surface P₂The corner part 8 of formation.

But thus the present invention is had the following advantages using thermoplastic resin compositions such as polyethersulfone resin constituents, even if The cross section setting as shown in Fig. 2 grade is square, rectangle (omitting chamfering), the sealing ring in eddying motion does not occur yet The medium rough sledding in gap 9 of a corner 15 insertion back side 7A and planar portions 4A of S.But consider pressure, temperature, movement speed The situation of the use conditions such as the characteristic of degree, operative orientation etc., fluid harshness also preferably forms chamfering shown in Fig. 7 etc. sometimes Portion 16.If explanation additional to the cross-sectional shape for being formed with the corner portion 16, as shown in fig. 7, from being indicated by double dot dash line Generally rectangular G is by skewed straight line L₁₅One corner 15 is subjected to chamfering.(C chamfering is instantiated in Fig. 7.)

As shown in figure 8, there is the 1st contact piece portion 31, the 2nd contact piece portion 32 and (thin wall shape) to tilt piece portion for the 1st protrusion 21 30, the corner 19 of a side of the aforementioned 1st contact piece portion 31 with the generally rectangular G adjacent with (shown in Fig. 7) corner 15 is preceding The corner 17 that the 2nd contact piece portion 32 has another party is stated, aforementioned (thin wall shape) tilts piece portion 30 for the 1st contact piece portion 31 and the 2nd Contact piece portion 32 links.

1st protrusion 21 is formed the (cross-sectional shape of shape (bracket shape) being bent at two positions.Tilt piece portion 30 are formed with recess portion 33, and in bracket shape, (outside of () has inclination corresponding surface 23 to aforementioned recess 33, and has bottom surface in inside 25.Tilt the thickness T in piece portion 30₁It is set as the following size, aforementioned dimensions are, while can ensure intensity and rigidity, Flexibility appropriate is assigned, can ensure sufficient deflection in a compressed state.

As shown in Fig. 9 (A) (C), the cross-sectional shape of the 2nd protrusion 22 is formed as triangle, has right angle in Fig. 9 (A) Sharp top, be the triangle that there is roundlet corner 35 at top in Fig. 9 (C).In addition, in Fig. 9 (B), the 2nd protrusion 22 cross-sectional shape is formed as trapezoidal, has the corner portion 16 after the top chamfer of triangle shown in Fig. 9 (A).

In each embodiment of Fig. 9 (A) (B) (C), all there is inclined surface 24 in bottom edge (bottom).Also, such as Figure 10 (A) shown in (B), with the gap closed state that the 1st protrusion 21 and the 2nd protrusion 22 overlap, triangle or trapezoidal inclined surface 24(parallel shape) face to tilt the inclination corresponding surface 23 in piece portion 30.In addition, trapezoidal cross sectional shape is not limited to as For the illustrated example Corner portion 16 and inclined surface 24 are in the shape of parallel shape, are not also really parallel shapes with inclined surface 24 including corner portion 16. In addition, Figure 10 (A) is corresponding with Fig. 9 (A), Figure 10 (B) is corresponding with Fig. 9 (B), and triangle shown in the double dot dash line of Figure 10 (B) Shape is corresponding with Fig. 9 (C).

More than, it is illustrated according to the other mode other than the mode illustrated based on Fig. 8, Fig. 9, Figure 10.It is above-mentioned The cross-sectional shape of circle main body 1 is the cross section such as Figure 10 institute for the rectangle that main body 1 will be enclosed in rectangle, the 1st protrusion 21 and the 2nd protrusion 22 Show, divided with cut-off rule Lc bis-, by the aforementioned inclination corresponding surface 23 of the 1st corresponding surface 41() and the 2nd aforementioned inclined surface corresponding surface 42( 24) it corresponds to each other.In turn, the 1st protrusion 21 is formed with portion's of pruning (recess portion) 33 in the opposite side of the 1st corresponding surface 41.

Also, as shown in Figure 5 and Figure 6, under the gap closed state that the 1st protrusion 21 and the 2nd protrusion 22 overlap, the Size (dimensional tolerance) setting 21 He of the 1st protrusion that 1 protrusion 21 and the 2nd protrusion 22 are exceeded with generally rectangular G not shown in Fig. 7 Each portion's size in the cross section of 2nd protrusion 22.

The 1st corresponding surface 41 of inclination corresponding surface 23(relative to the 1st protrusion 21 shown in Fig. 8) radial dimension H₂₃, it is axial Size T₂₃, by the 2nd corresponding surface 42 of inclined surface 24(of the 2nd protrusion 22 shown in Fig. 9 (A) (B) (C)) radial dimension H₂₄, it is axial Size T₂₄It is set to slightly smaller.In this way, the 1st protrusion 21 and the 2nd protrusion 22 are configured to not from circle main body 1 with gap closed state Cross section the size (dimensional tolerance) that exceeds of contour line.

That is, as shown in Figure 10, the 1st protrusion 21 and the 2nd protrusion 22 are being set to be overlapped with 4 sides of the generally rectangular G of Fig. 7 In the case where (consistent), formed between (the 1st protrusion 21) inclination corresponding surface 23 and (the 2nd protrusion 22) inclined surface 24 small Seal clearance g.The full-size of seal clearance g wishes to be set as 10 μm or more, and 100 μm or less.That is, it is desirable to be 10 μm ≤g≤100μm.If seal clearance g exceeds 100 μm, fluid leakage is sharply increased.

In this way, gap closed state and by the 1st protrusion 21 and the 2nd protrusion 22 to be overlapped with 4 sides of generally rectangular G Mode, in the state of keeping corresponding two sides 23,24(the 1st, the 2nd corresponding surface 41,42) seal clearance g maximum, by maximal clearance Be dimensioned to 10 μm or more and 100 μm hereinafter, so be able to suppress from corresponding two sides 23,24(the 1st, the 2nd corresponding surface 41, 42) leakage, and the 1st protrusion 21 and the 2nd protrusion 22 do not exceed from generally rectangular G, can also sealing performance be made to further increase.

As shown in figure 11, in a compressed state, sealing ring S is pushed by by sealing surface (plane) P₁With by sealing surface (curved surface) P₂The corner part 8 of formation, by the pressure P of fluid L₀, the 1st protrusion 21 occurs flexible deformation and is pushed to the 2nd protrusion 22。

Can dynamic vortex 7 carry out eddying motion, thus the 1st sliding contact surface 26 and the 2nd sliding contact surface 27 and object Part, That is sealed plane P₁, by sealing inner peripheral surface P₂It contacts (crimping), by the pressure P of fluid L₀, the 1st protrusion 21 is pushed to the 2nd Protrusion 22.1st protrusion 21 pushes the 2nd protrusion 22, and thus the leakproofness between the 1st protrusion 21 and two components of the 2nd protrusion 22 improves, The leakage of fluid L from seal clearance g is reduced.It will also realize that from Figure 10, on the 1st protrusion 21 and the 2nd protrusion 22, by continuous Face is formed with the 1st sliding contact surface 26 and the 2nd sliding contact surface 27.In the present invention, the 1st sliding contact surface 26 and the 2nd is sliding Dynamic contact surface 27 be also possible to omit machining (as already described) injection moulding face itself, moreover, will be according to JIS B The arithmetic average roughness (Ra) on its surface of 0601 measurement is set as 0.1 or more 2.0 hereinafter, it is made to play excellent leakproofness Energy and wear resistance.

In addition, as injection molding thermoplastic resin composition is answered in the present invention, crooked elastic rate be 1500MPa with Upper, 6000MPa or less, for example, it is preferable to be polysulfones resin composition, specially polyether sulfone (PES) resin combination, poly- Sulfone (PSU) resin combination, polyphenyl sulphonyl (PPSU, polyphenylsulfon) resin combination.Particularly, crooked elastic rate Desirably 2000MPa or more, 4000MPa or less.

In addition, as the polyethersulfone resin constituent for being relate suitable to sealing ring of the invention, to add to polyethersulfone resin Add powdered graphite etc. that there is the compound of layered crystal structure and/or the polyethersulfone resin constituent of fluororesin powder etc..By In adding in this wise, it is easy to adjust characteristic to the range of the above-mentioned elasticity of flexure, it is resistance to as the excellent in wear resistance of sealing ring Heat, chemical resistance are also good, have enough extensibilities, assembling and leakproofness are also good, are suitable for the air-conditioning illustrated in Fig. 1 With compressor etc..

In addition, poly arylidene thio-ester resin composition can also be applied as other thermoplastic resin compositions, specifically, Poly-p-phenylene sulfide ether (PPS) resin be added to above-mentioned powdered graphite etc. with the compound of layered crystal structure, fluororesin powder, And/or the polyphenylene sulfide resin composition of the fibrous charges such as glass fibre, carbon fiber.

In the present invention, it can be manufactured by the injection moulding of thermoplastic resin composition, so can be by size public affairs Difference is easily set at H (by the rank of the chamber of mold)₂₄≤H₂₃、T₂₄≤T₂₃。

Though illustration omitted, hypothesis is being set to H₂₄> H₂₃、T₂₄> T₂₃In the case where, in a state of use, sealing ring S It is pushed by by sealing surface P₁With by sealing surface P₂The corner part 8 of formation, but the 2nd protrusion 22 and two sides P at this time₁ 、P₂Tightly Contiguity touching, the 1st protrusion 21 are only connected to certain one side, generate External leakage gap, and fluid leakage occurs.In the present invention, (as before It is described) it is set to H₂₄≤H₂₃、T₂₄≤T₂₃, the 1st protrusion 21 and the 2nd protrusion 22 are configured in the gap closed state to overlap Under do not exceed from generally rectangular G, to prevent such rough sledding.

Then, the 2nd embodiment of the invention shown in Figure 12~Figure 14 is illustrated.

As shown in figure 12, the cross-sectional shape for enclosing main body 1 is rectangle above-mentioned, the rectangle indicated in the figure by solid line The case where (square), or there is the corner 15(by generally rectangular G by as shown in Figure 7 as double dot dash line Skewed straight line L₁₅) notch corner portion 16 polygon, (with drawer at movable side by sealing surface P under use state shown in Fig. 2₁ Sliding contact) the 1st sliding contact surface 26 have frictional resistance reducing mechanism 28.

Enclose main body 1 be used as frictional resistance reducing mechanism 28, be formed with by 19 notch of corner of generally rectangular G, with sealed Face P₁Discontiguous shallow trough shape notch 29.Shallow trough shape notch 29 is formed on the 1st sliding contact surface 26, is thus flowed by sealing Oil immersion in body enters the 1st sliding contact surface 26 and by sealing surface P₁Between (referring to Fig. 2), and by sealing surface P₁Sliding it is (sliding Row) property raising.In this way, shallow trough shape notch 29 is the notch of frictional resistance reduction.In the cross-section of Figure 12, such as two point In the case that scribing line has corner portion 16 like that, the width dimensions W of the 1st sliding contact surface 26₁It is configured to the 2nd sliding contact The width dimensions W in face 27₂10%~50%, be more preferably set to 15%~30%.If the width of the 1st sliding contact surface 26 Spend size W₁Insufficient lower limit value, the then possibility for thering is sealing performance to decline, if being more than upper limit value, the cunning of the 1st sliding contact surface 26 Row is insufficient, and sliding when swing is unstable, changes the seam areas of the 1st protrusion 21 and the 2nd protrusion 22, makes the leakage of fluid L Amount increases.

As shown in Figure 13 and Figure 14, shallow trough shape notch 29 is throughout circle main body 1 in addition to the 1st end 11 and the 2nd end 12 The centric angle range for being slightly less than 360 °, be continuously formed in the circumferential.At the 1st end 11 and the 2nd end 12, it is formed with Notch 29, thus the 1st protrusion 21 with by sealing surface P₁It does not contact, the bad feelings as described above for generating fluid leakage occurs Condition, so there are the 1st sliding contact surfaces 26 of the 1st protrusion 21.

Variation as shown in figure 15 is such, can also circle main body 1 in addition to the 1st end 11 and the 2nd end 12 slightly Centric angle range less than 360 °, multiple shallow trough shape notch 29 are intermittently formed in the circumferential.

In addition, there are the corners 19 of generally rectangular G in Figure 16, shallow trough shape notch 29 is disposed in the 1st sliding contact The width direction middle position in face 26.In addition, the 4th embodiment as shown in figure 17 is such, it can also be by the 1st sliding contact surface 26 with compared with other positions (the 2nd sliding contact surface 27) of sealed body 1 the lower material of coefficient of friction cover and to be formed.Or Person, though illustration omitted, can also be arranged bump on the 1st sliding contact surface 26.In this way, the cunning of the 1st sliding contact surface 26 Row (sliding) property improves.

Then, the 5th embodiment as shown in Figure 18 (A), circle main body 1 can also by for a corner 15 diagonally Other 18 notch of corner of generally rectangular G form notch 20.The notch 20 can also be referred to as cliff portion.Wishing should Notch 20 is formed as shape identical with recess portion (the pruning portion) 33 of the 1st protrusion 21 shown in Fig. 8.With this configuration, mold Production become easy, cost can be reduced.In addition, notch 20(and the recess portion 33 of the 1st protrusion 21) in thermoplastic resin group At object injection moulding when be formed, so not needing to be machined, moreover, the circle master with cross sectional shape shown in Fig. 7, Figure 12 Body 1 compares, and can save thermoplastic resin composition, and fee of material is inhibited at lower.In Figure 18 (A), by generally rectangular G's 19 notch of corner is reduced to form the frictional resistance of the 29, the 1st sliding contact surface 26 of shallow trough shape notch.

In addition, the variation as shown in Figure 18 (B), (from the point of view of preventing crack caused by being concentrated by stress) Also wish to form lesser radius of curvature R at the corner part as the shallow trough shape notch 29 of frictional resistance reducing mechanism 28₂₉ Fillet part 29A.Alternatively, can also be formed as other variations as shown in Figure 18 (C) as shallow trough shape notch 29 Thin triangular incision portion.

Figure 19 and Figure 20 (A) is the cross-sectional view for indicating the 6th embodiment of the invention.

In Figure 19, the generally rectangular G of circle main body 1 is rectangle, and structure is compared on the side (short side) for constituting the 1st sliding contact surface 26 It is short at the side (long side) of the 2nd sliding contact surface 27.That is, (in use state with drawer at movable side by sealing surface P₁Sliding contact) the The frictional resistance of 1 sliding contact surface 26 is reduced, and sliding property improves.By other of the diagonal generally rectangular G for a corner 15 18 notch of corner forms cliff portion (notch) 20.

In addition, the cross-sectional shape of the 2nd protrusion 22 is formed as triangle, and the 1st protrusion 21 has as shown in Figure 20 (A) Piece portion 30 is tilted, aforementioned inclination piece portion 30 has the inclination with the inclined surface 24 on 1 side of the quadrangle of the 2nd protrusion 22 in parallel shape Corresponding surface 23.Piece portion 30 is tilted on the outside with inclination corresponding surface 23, is formed in inside and is enclosed the notch 20 of main body 1 in company Continuous shape prunes portion 33.

In addition, Figure 20 (B) indicates the 7th embodiment, as the Figure 20 (B), the 1st protrusion 21 has inclination pair on the outside Face 23 is answered, and particularly, prunes portion's (recess portion) 33 what inside was formed with sagittal curvature.In turn, by the sagittal curvature The 1st contact piece portion 31, the 2nd contact piece portion 32 for pruning the 33, the 1st protrusion 21 of portion are formed as wall thickness dimension and locally become larger.But In the Figure 20 (B), it is desirable to be also that (though illustration omitted) will enclose the cross-sectional shape of main body 1, as make (be not rectangle and It is) shape pruning portion 33 and being formed from generally rectangular G notch of sagittal curvature shape, by the notch 20 for enclosing main body 1 and prune portion 33 are formed as sequential like.In Figure 20 (A), effect identical with the embodiment having been described above, effect can be obtained.

Then, various modifications example shown in Figure 21 is illustrated.

In Figure 21, according to the sequence of (A) (B) (C), the sectional area of the 1st protrusion 21 is reduced.In other words, thickness gauge is indicated Very little T₁Lesser situation is set to according to the sequence of (A) (B) (C).For from intensity, become according to the sequence of (A) (B) (C) It is weak, but be pressurized when the 1st protrusion 21 inclination corresponding surface 23 easily with respect to the 1st protrusion 21 24 flexible deformation of inclined surface and pushed away Pressure.In practical, this two sides of pushing property judges from intensity and easily, it may be said that according to the sequence of (A) (B) (C) of Figure 21 It is preferred that.In addition, by single dotted broken line L in Figure 21 (A) (B)₂₁It indicates like that be formed as and tilt 23 injustice of corresponding surface bottom surface 25 Row shape is also free.

In addition, having cutting for the circle main body 1 of the 1st protrusion 21, the 2nd protrusion 22 shown in Figure 21 (A) (B) (C) with standing shape Though face shape illustration omitted, in Figure 21 (A), will circle main body 1 be arranged it is rectangular, alternatively, be arranged to along bottom surface 25 have cut Oral area (cliff portion) 20(8(A referring to Fig.1)) shape be also free.But relative to Figure 21 (B) (C), if being arranged to phase With chamfered shape, then the cross section for enclosing main body 1 is too small, and posture when use is unstable, and it is advantageous to be set as rectangle.

Then, Figure 21 (D) is illustrated by Figure 10, Figure 11, so omitting the description here.

In Figure 21 (E), the case where cross sectional shape of recess portion 33 is formed as into curve arc-shaped is indicated, it is also preferred that by recess portion 33 are formed as quadrant.It is easy from the intensity of above-mentioned 1st protrusion 21 and the 1st protrusion 21 relative to the pushing of inclined surface 24 Property the judgement of (appropriate flexibility) two sides, Figure 21 (D) and (E) are more preferred than Figure 21 (A) (B) (C) in practical.

Also, as the cross sectional shape of the circle main body 1 with Figure 21 (D) (E), be also free to selection rectangle or Notch (cliff portion) 20(with cross sectional shape identical with recess portion 33 8(A referring to Fig.1)) shape.

But in each embodiment and variation having been described above based on Figure 18~Figure 21 etc., the cross section of main body 1 is enclosed Shape is the shape that other 18 notch of corner of generally rectangular G are formed notch 20 by (be not rectangle but), moreover, for In the case where the cross-sectional shape for being formed with the portion of pruning 33 on 1st protrusion 21, notch 20 and to prune portion 33 be sequential like from note It is preferred for penetrating molding aspect and not generating from the aspect of stress is concentrated.But in the present invention, " sequential like " is not limited to It prunes that portion 33 is identical with the shape of notch 20, also includes the case where continuous as mutually similar shape.

Then, Figure 22 indicates multiple other variations, and Figure 22 (A) (B) indicates the 1st protrusion 21 and the 2nd protrusion 22 by (no Linear cut-off rule Lc as the Figure 20 and Figure 21 having been described above but) the cut-off rule Lc bis- of L font the case where dividing.That is, Rectangular or square notch 16A is formed in a corner by the cross-sectional shape of the 1st protrusion 21, and the 2nd protrusion 22 is as embedding Together in the rectangular or square cross-sectional shape of notch 16A, the cross section of the 1st, the 2nd corresponding surface 41,42 is L word Shape.In addition, the portion 33 of pruning of the 1st protrusion 21 is L-shaped in Figure 22 (A), in Figure 22 (B), it is (by reality that this, which prunes portion 33, What line indicated) 5 side shapes, alternatively, being " rectangle indicated by single dotted broken line " etc..Though in addition, illustration omitted, consideration corresponds to The case where cross-sectional shape of the circle main body 1 of Figure 22 (A) or (B) is rectangle and have and the portion of pruning 33 is same or similar cuts The case where shape of oral area 20.

In addition, indicating the 1st protrusion 21 and the 2nd protrusion 22 by quadrant in the variation shown in Figure 22 (C) (D) The cut-off rule Lc bis- of arc-shaped the case where dividing.That is, the cross-sectional shape of the 1st protrusion 21 has a quarter round shape in a corner Notch 16B, the 2nd protrusion 22 are a quarter round shape for being embedded in notch 16B.In addition, in Figure 22 (C), the 1st protrusion 21 portion 33 of pruning is by the short straight line portion 37,37 of the radius biggish arc sections 36 and its both ends of the cut-off rule Lc along arc-shaped The brilliant of composition.In Figure 22 (D), illustration prunes the case where portion 33 is triangle.

Though in addition, illustration omitted, the cross-sectional shape setting that there is circle main body 1 corresponding with Figure 22 (C) (D) is rectangular The case where and be arranged to that there is and prune the case where shape of the same or similar notch 20 in portion 33.

Also, in each variation of Figure 22 (A) (B) (C) (D), the 1st corresponding surface 41 and the 2nd corresponding surface 42 all phases Mutually parallel, therefore, gap g describes L-shaped or a quarter round shape with the state of certain small size.

The application method (effect) of the sealing ring of aforementioned present invention is illustrated.

As shown in figure 11, sealing ring S in a compressed state, be pushed to can dynamic vortex 7 and shell 4 corner part 8, the 2nd is convex Portion 22 is corresponding with the inner part of the corner part 8.Sealing ring S is, the 1st sliding contact surface 26 and eddying motion can dynamic vortex 7 can Side is moved by sealing surface P₁The affixed side of sliding contact (crimping), the 2nd sliding contact surface 27 and shell 4 is by sealing surface P₂Sliding connects It touches (crimping).1st protrusion 21 is, by the pressure P of fluid L₀, inclination piece portion 30 is pushed into the inclined surface of the 2nd protrusion 22 24, the leakproofness between the 1st protrusion 21 and two components of the 2nd protrusion 22 improves.In this way, coming from the 1st protrusion 21 and the 2nd protrusion 22 Seam areas fluid leak reduce.In addition, the use position of the sealing ring S in compressor, and do not allow fluid non-fully Leakage, for sealing ring S of the invention, it is desirable that the leakproofness with existing polytetrafluoroethylene (PTFE) sealing ring same degree.That is, close Seal S is not preferably (compared with polytetrafluoroethylene (PTFE) sealing ring) that fluid leakage is excessive, is not also preferably that fluid leakage is too small. Therefore, sealing ring S of the invention is such as Figure 21 (A)~(E) detailed description, by the thickness T of the 1st protrusion 21₁And shape Shape carries out setting change, the deflection (deforming easiness) of the 1st protrusion 21 when thus, it is possible to adjust compression.

As shown in Figure 12 and Figure 16~Figure 18, shallow trough shape notch 29 is set, is made with drawer at movable side by sealing surface P₁Sliding connects The frictional resistance of the 1st sliding contact surface 26 of touching becomes smaller (reductions), thus can dynamic vortex 7 and shell 4 corner part 8, seal Circle S be retained stable posture, can dynamic vortex 7 by sealing surface P₁It is steady with the sliding of the 1st sliding contact surface 26 (sliding) It is fixed, it is able to suppress the variation of the seam areas of the 1st protrusion 21 and the 2nd protrusion 22.

In addition, the 1st protrusion 21 is can also it is stated that the present invention is able to carry out design change in Figure 20 and Figure 21 Be deformed into the cross sectional shape protruded to 22 side of the 2nd protrusion, tilt corresponding surface 23 and bottom surface 25 is not parallel can also be with, in turn, Bottom surface 25 can also bend to arc-shaped.

More than, the explanation such as carried out based on FIG. 1 to FIG. 22, sealing ring of the invention is formed as having seam at the one of circumference The circular global shape of gap 5, has circle main body 1 and the 1st protrusion 21, the 2nd protrusion 22, aforementioned 1st protrusion 21, the 2nd protrusion 22 are protrusively provided in the circumferential from the 1st end 11, the 2nd end 12 of the circle main body 1, are configured to, by thermoplastic resin Constituent, is integrally formed entirety, and the cross-sectional shape of above-mentioned circle main body 1 is rectangle, above-mentioned 1st protrusion 21 and the 2nd protrusion 22 The cross section of the rectangle of above-mentioned circle main body 1 is divided by cut-off rule Lc bis-, mutually by the 1st corresponding surface 41, the 2nd corresponding surface 42 It faces, in turn, above-mentioned 1st protrusion 21 is to be formed with the cross section shape in the portion of pruning 33 in the opposite side of above-mentioned 1st corresponding surface 41 Shape is set to, under the gap closed state that above-mentioned 1st protrusion 21 and above-mentioned 2nd protrusion 22 overlap, above-mentioned 1st protrusion 21 and the size that does not exceed from the contour line of the cross section of above-mentioned circle main body 1 of above-mentioned 2nd protrusion 22, so it is convex to improve the 1st Leakproofness at the seam areas of portion 21 and the 2nd protrusion 22 can reduce fluid leakage.Pass through the note of thermoplastic resin composition Molding is penetrated, tolerance can be easily sized, can be easy, inexpensively obtain high-quality, high performance sealing ring.It can save Slightly machining, the material loss also less generation such as cutting, grinding, cutting can be manufactured inexpensively.

In addition, sealing ring is formed as the circular global shape at the one of circumference with gap 5, there is circle main body 1 With the 1st protrusion 21, the 2nd protrusion 22, aforementioned 1st protrusion 21, the 2nd protrusion 22 are from the 1st end 11, the 2nd end 12 of the circle main body 1 Setting outstanding in the circumferential, is configured to, and by thermoplastic resin composition, entirety, the cross of above-mentioned circle main body 1 is integrally formed Cross sectional shape is, will be with drawer at movable side by sealing surface P₁With affixed side by sealing surface P₂Corner part 8 it is corresponding, about basic square A corner 15 of shape G is other 18 notch of corner of diagonal above-mentioned generally rectangular G, forms notch 20, above-mentioned 1st protrusion 21 With the 2nd protrusion 22 by the cross section of the above-mentioned circle main body 1 of the cross-sectional shape with above-mentioned notch 20 by cut-off rule Lc bis- Point, it is faced each other by the 1st corresponding surface 41, the 2nd corresponding surface 42, above-mentioned 1st protrusion 21 is to be formed with and above-mentioned circle main body 1 Above-mentioned notch 20 be in sequential like the cross-sectional shape for pruning portion 33, be set to, in above-mentioned 1st protrusion 21 and the above-mentioned 2nd Under the gap closed state that protrusion 22 overlaps, above-mentioned 1st protrusion 21 and above-mentioned 2nd protrusion 22 be not from above-mentioned generally rectangular G The size exceeded can reduce fluid and let out so can improve the leakproofness of the seam areas of the 1st protrusion 21 and the 2nd protrusion 22 Leakage.By the injection moulding of thermoplastic resin composition, it can be easily sized tolerance, can be easy, inexpensively obtain High-quality, high performance sealing ring.The machining such as cutting, grinding, cutting can be omitted, the generation of material loss also tails off, It can be manufactured inexpensively.Stable posture when sliding is able to suppress the variation of the seam areas of the 1st protrusion 21 and the 2nd protrusion 22, It can prevent fluid leakage from becoming excessive.Thermoplastic resin composition can be saved, fee of material is inhibited at lower.In turn, the longevity It orders also elongated.

In addition, above-mentioned circle main body 1 and drawer at movable side are by sealing surface P₁1st sliding contact surface 26 of sliding contact has friction The shallow trough shape notch 29 of resistance reduction, so stable posture when sliding, is able to suppress the 1st protrusion 21 and the 2nd protrusion 22 Seam areas variation, can prevent fluid leakage it is excessive.In turn, there is service life also longer sharp point.

In addition, above-mentioned circle main body 1 and drawer at movable side are by sealing surface P₁1st sliding contact surface 26 of sliding contact is by friction system The low material of number covers to be formed, and is configured to reducing friction resistance, so stable posture when sliding, is able to suppress the 1st protrusion 21 With the variation of the seam areas of the 2nd protrusion 22, fluid leakage can be prevented excessive.In turn, there is service life also longer sharp point.

Central point P of the above-mentioned circle main body 1 of above-mentioned opening-wide state relative to above-mentioned gap 5₅In 180 ° ± 30 ° of range Inside there is radius of curvature R₁₃It for maximum sized position 13, is set to, from the maximum sized position 13 respectively to above-mentioned 1st end Portion 11, the 2nd end 12, in circumferential M₁、M₂It is upper close, radius of curvature R₁、R₂Reduce, it is convex in above-mentioned 1st protrusion 21 and the 2nd Under the gap closed state that portion 22 overlaps, global shape is in circular, so being the easy gap 5 of Mold Making in unlimited State, and be in circular under the use state that the 1st protrusion 21 and the 2nd protrusion 22 are overlapped, it is played relative to circular inner periphery face Excellent sealing performance (leakproofness).

Then, Figure 23 and Figure 24 indicates the 8th embodiment of the invention.Figure 23 is the attached drawing instead of earlier figures 2, Tu24Shi The attached drawing being generally corresponding to earlier figures 8, Fig. 9, Figure 10 etc..

In Fig. 1 and Fig. 2, Fig. 3~Fig. 6, embodiment shown in structure, effect and Figure 23, Figure 24 for having been described above Situation is identical, so repeated explanation is omitted, hereinafter, being mainly illustrated to different structures, effect etc..

As shown in Figure 23, Figure 24 (A), the cross-sectional shape of circle main body 1 is round.Also, shape is used shown in Figure 23 Under state, have with can dynamic vortex 7 back side 7A etc. (drawer at movable side) by sealing surface P₁1st sliding contact portion of sliding contact (affixed side) of the inner wall 14 of 26A and seal groove 4B etc. is by sealing surface P₂2nd sliding contact portion 27A of sliding contact.By Be pushed into when pressure by the orthogonal thereto shape of cross-section by sealing surface P₁ 、P₂At the corner part 8 of formation.Above-mentioned 1st, the 2nd is sliding Contact portion 26A, 27A are moved as a whole linearly with each by sealing surface P₁、P₂Contact, but in the higher situation of pressure or In the case where generating abrasion, with thinner band-like contact.

But the present invention uses the thermoplastic resin compositions such as polyethersulfone resin constituent, and is arranged to circular cross-section, by This has the advantages of not generating a problem that sealing ring S is embedded in gap 9 of back side 7A and planar portions 4A in eddying motion.

Also, as shown in figure 24, the circular cross section such as the figure (B) of main body 1 will be enclosed in the 1st protrusion 21 and the 2nd protrusion 22 It is shown, divide by cut-off rule Lc bis-, is faced each other by the 1st corresponding surface 41, the 2nd corresponding surface 42.Specifically, by the 2nd protrusion 22 cross-sectional shape is set to, with will be from circular central point O₂₀Play orthogonal two axis (x-axis, y-axis) that centric angle β is 90 ° The circular arc chord linked with the two o'clock 38,39 of circular wheel profile G ' intersection surrounds the arch to be formed.

On the other hand, as shown in Figure 24 (B), the shape of the cross section of the 1st protrusion 21 is set, so that forming small sealing Gap g.That is, be arranged to, can with the 1st protrusion 21 and the 2nd protrusion 22 not shown in Figure 24 (A) cross section of circle main body 1 The mode that circular wheel profile G ' exceeds, make the 1st protrusion 21, the 2nd protrusion 22 each arc sections abut circular wheel profile G ' size (shape), and at this point, small seal clearance g is formed between the 1st, the 2nd corresponding surface 41,42.

In Figure 24 (B), the case where cut-off rule Lc is 45 ° of inclined straight lines is indicated, and, centric angle β is 90 °, thus Under the use state shown in Figure 30 (A), the 2nd protrusion 22 is relative to by sealing surface P₁、P₂With stable posture crimping, (sliding is connect Touching).Moreover, as (thin) bowed 2nd protrusion 22, the point 38,39 at both ends is nearby easy to happen flexible deformation, with circular arc face It will be by sealing surface P₁、P₂It crimps (sliding contact).Moreover, the both ends of seal clearance g are closed, so leakproofness is also maintained.

In addition, in the 1st protrusion 21, being equivalent to the bowed string in cross section of the 1st corresponding surface 41 as shown in Figure 24 (D) The central angle β of 1st corresponding surface 41₄₁More than 90 °.

In Figure 24, if additional explanation, so that the arc sections of the 1st protrusion 21 and the 2nd protrusion 22 and the cross for enclosing main body 1 Under the mode unanimous circumstances of the contour line G ' coincidence of section circle, between the 1st straight corresponding surface 41 and the 2nd corresponding surface 42, Form small seal clearance g.Seal clearance g wishes to be set to 10 μm≤g≤100 μm.If seal clearance g is more than 100 μm, Then fluid leakage sharply increases.In such manner, it is possible to inhibit the fluid from the 1st, the 2nd corresponding surface 41,42 to leak, and the 1st protrusion 21 Do not exceed from (substantially) circular contour line G ' with the 2nd protrusion 22, sealing performance can also further increase.

Then, Figure 25 indicates the 9th embodiment of the invention.If compared with the 8th embodiment (Figure 24) above-mentioned, the 2 protrusions 22 become a quarter circle from arch.

In turn, if specifically describing, the 1st protrusion 21 and the 2nd protrusion 22 will enclose circular cross section (the contour line G of main body 1 ') as shown in Fig.(B), divided with the cut-off rule Lc bis- of L-shaped, is faced by the 1st corresponding surface 41, the 2nd corresponding surface 42.

As shown in Figure 25 (B), the 2nd protrusion 22 has from circular central point O₂₀Rising along centric angle β is 90 ° orthogonal 2nd corresponding surface 42 of two axis (x-axis, y-axis), it is corresponding with 90 ° of centric angle β with arc sections.

On the other hand, as shown in Figure 25 (B) (C), in a manner of forming small seal clearance g, from circular wheel profile G ' The notch 40 more slightly larger than the 2nd protrusion 22 is formed, the cross-sectional shape of the 1st protrusion 21 is set.The centric angle β of the notch 40₄₀It is 90°。

In the case where such shape, size, under the use state shown in Figure 30 (B), the 2nd protrusion 22 is in corner part 8 with stable posture and by sealing surface P₁、P₂It crimps (sliding contact).Particularly, seal clearance g(is in cross-section) by sealing surface P₁、P₂Closing, so leakproofness is maintained.

Also, above-mentioned seal clearance g is preferably set to numberical range identical with the embodiment of above-mentioned Figure 24.

Then, variation as shown in figure 26 is such, can also be by ratio ratio Figure 24 (B) of the sectional area of the 2nd protrusion 22 The case where the earth set.That is, if by each center with circular cross section of the point 38,39 at the both ends of the string of the 2nd protrusion 22 Point O₂₀Centric angle formed by two straight lines of connection is set as β₄₂, then < β in 90 ° is set₄₂≤ 150°。

As shown in Figure 30 (A), relative to orthogonal by sealing surface P₁、P₂In the state of crimping, generated at sealing ring S In the case where distortion, the leakage via the fluid of gap g is less.

Then, in the variation of Figure 27, with Figure 25 (B) the case where compared with, the ratio of the sectional area of the 2nd protrusion 22 compared with Greatly.In this way, under use state identical with Figure 30 (B), even if generate distortion at sealing ring S, via the fluid of gap g It leaks also less.

In Figure 28, multiple variations of the invention are indicated.2nd protrusion 22 is identical as Figure 24 or Figure 26 (A), but the 1st is convex Portion 21 and the difference having been described above.That is, the 1st protrusion 21 is all in the 1st corresponding surface 41 in Figure 28 (A)~(D) in each Opposite side (circular arc surface side) is formed with the cross-sectional shape in the portion of pruning 33.

In Figure 28 (A), pruning portion 33 is biggish arch, and the 1st protrusion 21 is by the 1st corresponding surface 41 and has in parallel Angled straight lines shape bottom surface sections 25 inclination piece portion 30 constitute.Alternatively, it is also possible to be, by the back side indicated by single dotted broken line The wall thickness of portion 25A, inclination piece portion 30 are formed as gradually decreasing with to one party.That is, single dotted broken line indicate back part 25A with 1st corresponding surface 41 is not parallel and free.

In Figure 28 (B), the cross sectional shape for pruning portion 33 is roof type, and the 1st protrusion 21 is that have nail portion 43,43 at both ends U-shaped follow closely (カ ス ガ イ) shape.In other words, the shape of the 1st protrusion 21 is set to its both ends by inclination piece portion 30 and continuously Nail portion 43,43 constitute.

Then, in Figure 28 (C), the cross sectional shape for pruning portion 33 is rugby shape, and the 1st protrusion 21 has straight line on the outside The 1st skewed corresponding surface 41, and there is sagittal curvature recess portion in inside (back side).

In Figure 28 (B) (C), it may be said that the 1st its both ends of protrusion 21 are formed with the reinforcement part of heavy wall.Then, in Figure 28 (D) in, the cross-sectional shape of the 1st protrusion 21 is sickle-shaped.That is, by the linear back part parallel with the 1st corresponding surface 41 25B, the straight line portion 25C that shape substantially at right angles is bent relative to the linear back part 25B, the 1st protrusion 21 is formed as by shank 44 and blade 45 constitute it is above-mentioned sickle-shaped.Also, it prunes portion 33 to constitute by by linear back part 25B and straight line portion 25C Broken line incision formed.

Then, in Figure 29, multiple other variations are also shown that it has.2nd protrusion 22 is identical with Figure 25 or Figure 27 Cross-sectional shape, but the 1st protrusion 21 is different from the variation having been described above.That is, as shown in Figure 29 (A)~(D), the 1st protrusion 21 It is to be formed with the cross-sectional shape in the portion of pruning 33 in the opposite side (circular arc surface side) of the 1st corresponding surface 41.

As shown in Figure 29 (A), bowed 33 notch of portion of pruning is formed by skewed straight line portion 46.In addition, in Figure 29 (B) in, 33 notch of portion will be pruned by the folding line 47 of (step-like) in a zigzag and will be formed.In addition, in Figure 29 (C), by circle Camber line 48 will prune 33 notch of portion and be formed.In Figure 29 (D), by tool, there are two the waveform lines of circular arc line 49,49 to prune 33 notch of portion is formed.

Therefore, two scallops 50,50 are connected junction configuration, In in Figure 29 (A) by the cross-sectional shape of the 1st protrusion 21 It is zigzag in Figure 29 (B), two two ginkgo leaves is connected into junction configuration in Figure 29 (C) (D).

In the variation of each of Figure 28, Figure 29, (the case where with Figure 24~Figure 27 is identical) makes the 1st protrusion 21 Arc sections 51, in the case that the arc sections 52 of the 2nd protrusion 22 are overlapped (consistent) with circular wheel profile G ', in the 1st protrusion 21 Small seal clearance g is formed between 1st corresponding surface 41 and the 2nd corresponding surface 42 of the 2nd protrusion 22.The maximum ruler of seal clearance g It is very little to wish to be set as 10 μm or more, and 100 μm or less.

In this way, being in gap closed state as sealing ring S, and the 1st protrusion 21 and the 2nd protrusion 22 make respectively in cross-section In the state that a arc sections 51,52 are overlapped with circular wheel profile G ', seal clearance g is full-size, which is set as 10 μm or more and 100 μm hereinafter, so can will leak inhibition, and the 1st protrusion from the fluid of the 1st, the 2nd corresponding surface 41,42 21 and the 2nd protrusion 22 does not exceed from contour line G ', so sealing performance further increases.

As shown in Figure 30 and Figure 31, in a compressed state, sealing ring S is pushed by by sealing surface P₁With by sealing surface P₂ The corner part 8 of formation, by the pressure P of fluid L₀, the 1st protrusion 21 is pushed to the 2nd protrusion 22.

Can dynamic vortex 7 carry out eddying motion (referring to Fig.1), thus the 1st corresponding surface 41 and the 2nd corresponding surface 42 are close to object portion Part, i.e., by sealing surface P₁, by sealing surface P₂, by the pressure P of fluid L₀, the 1st protrusion 21 is pushed to the 2nd protrusion 22.1st protrusion 21 push the 2nd protrusion 22, and thus the leakproofness between the 1st protrusion 21 and two components of the 2nd protrusion 22 improves, and come from seal clearance The leakage of the fluid L of g is reduced.Also, arc sections 52 and the arc sections 51 of the 1st protrusion 21 of the 2nd protrusion 22 etc. also can be provinces The injection moulding face being slightly machined in itself, moreover, by the arithmetic average roughness on its surface measured according to JIS B 0601 (Ra) it is set as 0.1 or more 2.0 hereinafter, it is made to play excellent sealing performance and wear resistance.

In addition, in the present invention, as should injection molding thermoplastic resin composition, be rectangle with cross section (Fig. 2~Figure 22) is identical, so omitting repeated explanation.

The application method and effect of above-mentioned sealing ring S are illustrated.As shown in Figure 30, Figure 31, sealing ring S is in compression shape Be pushed under state can dynamic vortex 7 and shell 4 the configuration corresponding with the inboard position of the corner part 8 of the 8, the 2nd protrusion 22 of corner part. The arc sections 52 of 2nd protrusion 22 such as illustrate in Figure 24, Figure 25, centered on angle beta there are 90 ° or more, so its circular arc Portion 52 relative to can dynamic vortex 7 drawer at movable side by sealing surface P₁And affixed side is by sealing surface P₂Simultaneously sliding contact (pressure It connects).Practical sealing is carried out as a result,.Moreover, arc sections 52 with by sealing surface P₁ 、P₂Crimping, contact face pressure is also higher, describes Contact face pressure distribution with peak value, so leakproofness is also excellent.

In addition, also such as Figure 30 (A) (B) and Figure 31 (B) illustration, also there is the 1st pair of its arc sections 51 at the 1st protrusion 21 Answer surface side end 51A relative to drawer at movable side by sealing surface P₁, affixed side is by sealing surface P₂The case where crimping simultaneously, can be into one Step improves leakproofness.The pressure P of 1st protrusion 21 receiving fluid L₀, become to the inboard elasticity of 22 side of the 2nd protrusion and corner part 8 Shape, so relative to two by sealing surface P₁ 、P₂A possibility that crimping, gets higher, and the gap g that the 1st, the 2nd corresponding surface 41,42 is mutual Size also reduce, fluid leakage reduce.

In addition, the sealing ring S of use position to(for) compressor, is not allow fluid to leak completely, for this hair Bright sealing ring S, it is desirable that the leakproofness with existing polytetrafluoroethylene (PTFE) sealing ring same degree.That is, sealing ring S(and poly- four Vinyl fluoride sealing ring compares) it is not preferably that fluid leakage is excessive, but also preferably fluid leakage is too small.Therefore, of the invention Sealing ring S in Figure 24~Figure 29, such as various explanations, can shape to the 1st protrusion 21, size carry out various changes, institute To change shape, size in this way, the deflection (deformation easiness) of the 1st protrusion 21 when being pressurized can be adjusted.

It is such as lower seal based on Figure 23~Figure 31 sealing ring of the invention that is related to being described in detail, is formed as in circumference Circular global shape at one with gap 5 has circle main body 1, the 1st protrusion 21, the 2nd protrusion 22, aforementioned 1st protrusion 21, the 2nd protrusion 22 is protrusively provided in the circumferential from the 1st end 11, the 2nd end 12 of the circle main body 1, is configured to, by heat Entirety is integrally formed in plastic resin constituent, and the cross-sectional shape of above-mentioned circle main body 1 is round, above-mentioned 1st protrusion 21 and the 2nd The circular cross section two of above-mentioned circle main body 1 is divided by cut-off rule Lc in protrusion 22, by the 1st corresponding surface 41, the 2nd corresponding surface 42 It faces each other, is set to, it is under the gap closed state that above-mentioned 1st protrusion 21 and above-mentioned 2nd protrusion 22 overlap, above-mentioned The size that 1st protrusion 21 and above-mentioned 2nd protrusion 22 do not exceed from the contour line G ' of the cross section of above-mentioned circle main body 1, so can Improve the leakproofness of the seam areas of the 1st protrusion 21 and the 2nd protrusion 22, fluid can be leaked and be reduced.Pass through thermoplastic resin The injection moulding of constituent can be easy, inexpensively obtain high-quality, high performance sealing ring.Can omit cutting, grinding, The machining such as cutting, the generation of material loss is also less, can be manufactured inexpensively.Particularly, cross-sectional shape is circle, by This is relative to by sealing surface P₁、P₂It is easy cooperation, and contacts the mountain type that face pressure distribution display has peak value, it is higher to become leakproofness High performance sealing ring.

In addition, sealing ring is formed as the circular global shape at the one of circumference with gap 5, have circle main body 1, 1st protrusion 21, the 2nd protrusion 22, aforementioned 1st protrusion 21, the 2nd protrusion 22 exist from the 1st end 11, the 2nd end 12 of the circle main body 1 It is protrusively provided, is configured in circumferential direction, entirety, the cross section of above-mentioned circle main body 1 are integrally formed by thermoplastic resin composition Shape be it is round, above-mentioned 1st protrusion 21 and the 2nd protrusion 22 are by cut-off rule Lc by the circular cross section two of above-mentioned circle main body 1 Point, it is faced each other by the 1st corresponding surface 41, the 2nd corresponding surface 42, in turn, above-mentioned 1st protrusion 21 is in above-mentioned 1st corresponding surface 41 opposite side is formed with the cross-sectional shape in the portion of pruning 33, is set to, in above-mentioned 1st protrusion 21 and above-mentioned 2nd protrusion 22 Under the gap closed state to overlap, above-mentioned 1st protrusion 21 and above-mentioned 2nd protrusion 22 be not from the cross section of above-mentioned circle main body 1 The size that exceeds of contour line G ', so the 1st protrusion 21 is in a compressed state, easy pushing is deformed by orthogonal by sealing surface P₁、P₂The corner part 8 of formation, leakproofness further increases.It in turn, can by the injection moulding of thermoplastic resin composition It is easy, inexpensively obtains high-quality, high performance sealing ring.The machining such as cutting, grinding, cutting, material damage can be omitted The generation of consumption is also less, can be manufactured inexpensively.Particularly, cross-sectional shape is circle, thus relative to by sealing surface P₁、P₂ It is easy cooperation, and contacts face pressure distribution table and shows the mountain type with peak value, becomes the higher high performance sealing ring of leakproofness.

In addition, the cross section of circle main body 1 is circle, it is configured to, the above-mentioned circle main body 1 of above-mentioned opening-wide state is also relative to upper State the central point P in gap 5₅, there are radius of curvature R in the range of 180 ° ± 30 °₁₃For maximum sized position 13, it is set to, It is respectively facing above-mentioned 1st end 11, the 2nd end 12 from the maximum sized position 13, in circumferential M₁、M₂It is upper close, curvature Radius R₁、R₂It reduces, global shape is in positive round under the gap closed state that above-mentioned 1st protrusion 21 and the 2nd protrusion 22 overlap Shape so being in opening-wide state for the easy gap 5 of Mold Making, and uses shape what the 1st protrusion 21 and the 2nd protrusion 22 were overlapped It is in circular, relative to circular inner periphery face (by sealing surface P under state₂) play excellent sealing performance (leakproofness).

Then, Figure 32~Figure 42 is to indicate of the invention 10th, the 11st embodiment and each variation figure.

As shown in Figure 32~Figure 35 and Figure 37, Figure 38, Figure 39 etc., the cross section of circle main body 1 is rectangle, is had without before The cross section of notch (shown in Figure 19 etc.) (cliff portion) 20 is stated, and the circle main body 1 is equipped on by orthogonal in cross section Drawer at movable side by sealing surface P₁With affixed side by sealing surface P₂The corner part 8 of formation, be crimped on two it is above-mentioned by sealing surface P₁、P₂ And realize sealing function, it is identical as the embodiment having been described above in the above, but be different aspect be, in addition to Orthogonal two are above-mentioned by sealing surface P₁、P₂Opposite sealing is with opposed area X(referring to the non-opposite area other than Figure 38, Figure 39) Domain Z is prevented equipped with accidentally assembly with mark U.

Above-mentioned sealing the 1st sliding contact surface 26 of opposed area X and Figure 39 and the 2nd sliding contact surface 27 are quite.

If enclosing the cross section that main body 1 is rectangle, other than aforementioned 1st sliding contact surface 26 and the 2nd sliding contact surface 27 Both sides are non-relative region Z, and mark U is arranged in non-relative region Z.In Figure 33, Figure 34, Tu35Zhong, with the 1st sliding contact On the face 56 of the parallel opposite side in face 26, separate predetermined distance in the circumferential has bottom outlet 57 that mark U is arranged by circular.

In the embodiment shown in Figure 33 and Figure 34, by thermoplastic resin composition by the integrated injection of sealing ring S When penetrating molding, at the same be integrally formed as accidentally assemble prevent having bottom outlet 57 with mark U.

In the embodiment shown in Figure 37 (B) (C), by the inner peripheral surface 58 parallel with the 2nd sliding contact surface 27 and lower surface The dolly dimple portion 59 of 56 18 notch of corner is arranged throughout the entirety (identically as Figure 35) of sealing ring S with predetermined distance.It is small recessed Concave portion 59 is cubic in Figure 37 (B), is that a quarter is cylindric or a quarter is spherical in Figure 37 (C).In addition, In In embodiment shown in Figure 39, it is also provided with and the identical dolly dimple portion 59 Figure 37 (C), composition mark U.

Then, the cross-sectional shape of the 1st protrusion 21 and the 2nd protrusion 22 is that (cross section is square as inciting somebody to action as shown in figure 36 Shape) generally rectangular cut-off rule Lc bis- divides, corresponds to each other by inclination corresponding surface 23 and inclined surface 24.2nd protrusion 22 tool There are the continuous corner 15A in a corner 15 with aforementioned circle main body 1, in each of Figure 36 (A) (B) (C), the 2nd protrusion 22 Sectional area than the 1st protrusion 21 is small, as shown in figure 38 as the triangle on vertex using the above-mentioned corner 15A of the 2nd protrusion 22, with Corner part is corresponding in corner part 8, makes gap 9 in closed to play leakproofness.It is convex that Figure 36 (A) (B) (C) illustrates the 2nd respectively The section in portion 22 be triangle, small rectangle, a quarter circle situation.In addition, as shown in figure 35, in the 1st protrusion 21 and the 2nd In the gap closed state that protrusion 22 overlaps, as shown in figure 36, the cross section for setting the 1st protrusion 21 and the 2nd protrusion 22 is each Portion's size, so that becoming the 1st protrusion 21 and the 2nd protrusion 22 not from generally rectangular G(referring to Figure 37) size (the size public affairs that exceed Difference).

Then, in Figure 40, the cross sectional shape of the 2nd protrusion 22 is triangle, and in contrast, the 1st protrusion 21 is in inclination pair The opposite side in face 23 is answered to be formed with portion's of pruning (recess portion) 33.In Figure 40 (A) and Figure 40 (B) (solid line), the section of the 1st protrusion 21 Shape is that the parallax parallel with inclination corresponding surface 23 is set as the trapezoidal of bottom surface sections 25, in addition, thickness T₁It can change Size design.In turn, it is such as indicated in Figure 40 (B) with single dotted broken line, can also will constitute the parallax of the bottom surface of the 1st protrusion 21 25D is arranged to inclination corresponding surface 23 in non-parallel shape.

Then, in Figure 40 (C), the 1st protrusion 21 have inclination piece portion 30 and by its both ends the 1st, the 2nd contact piece portion The cross sectional shape that (bent sheet portion) 31,32 is constituted, pruning portion 33 is diamond tee section.

In addition, recess portion 33 is formed as curve arc-shaped in Figure 40 (D).Also, the 1st protrusion 21 has and is sealed Face P₁、P₂Contact piece portion 31A, 32A that (referring to Figure 32) abuts.

In turn, it in Figure 40 (A)~(D), is prevented with the mistake assembly that dotted line diagram is formed on circle 1 side of main body with mark U. That is, recessed wrong assembly is prevented with mark U at non-relative region Z.Specifically, the mark U of Figure 40 (A) (C) (D) is configured in The identical position with Figure 37 (B) (C), in addition, the mark U of Figure 40 (B) is identical as Figure 37 (A).

Then, in the 11st embodiment as shown in figure 41, the cross-sectional shape of the circle main body 1 of sealing ring S is circle, Under the assembled state of the seal groove 4B for the shell 4 for being assemblied in scroll compressor mechanism 3, the 1st, the 2nd sliding of arc-shaped is connect Contact portion 26A, 27A is respectively and by sealing surface P₁ 、P₂Sliding contact.1st, the 2nd sliding contact portion 26A, 27A is in ring master At the section of body 1, positioned at the position of the centric angle at about 90 °.In the circle main body 1 of such circular cross section, non- Accidentally assembly, which is also arranged, in opposed area Z prevents having bottom outlet 57 with mark U().In this way, circle main body 1 can be substantially round (circular wheel Profile) G '.

As shown in figure 42, which is divided, forms the 1st protrusion 21 and the 2 protrusions 22.1st protrusion 21 and the 2nd protrusion 22 are across small seal clearance g, so that inclination corresponding surface 23 and inclined surface 24 are opposite. Also, the 1st protrusion 21 is formed with the portion of pruning 33 in the opposite side of inclination corresponding surface 23.In the 1st protrusion 21 and 22 phase of the 2nd protrusion Under the gap closed state being mutually overlapped, the 1st protrusion 21 and the 2nd protrusion 22 are configured to not from the profile of the cross section of circle main body 1 The size that line (substantially round G ') exceeds.

Also, the cross-sectional shape of the 2nd protrusion 22 is thinner arch, by arc sections 52 and (as string) inclined surface 24 form, and the arc sections 52 of the 2nd protrusion 22 are under (shown in Figure 41) use state, and by sealing surface P₁ 、P₂Crimping is (sliding Dynamic contact).

In addition, though illustration omitted also can be set to the cross-sectional shape for omitting and pruning portion 33 at the 1st protrusion 21.

It is biggish arch that the sealing ring of Figure 42 (A), which is configured to the portion of pruning 33, and the 1st protrusion 21 is made of inclination piece portion 30, Aforementioned inclination piece portion 30 has inclination corresponding surface 23 and skewed bottom surface sections 25 in parallel.Alternatively, it is also possible to by its wall thickness Be formed as gradually decreasing to one party.

In Figure 42 (B), the cross sectional shape for pruning portion 33 is roof type, and the 1st protrusion 21 is that have nail portion 43,43 at both ends U-shaped follow closely shape.

Then, in Figure 42 (C), the cross sectional shape for pruning portion 33 is rugby shape, and the 1st protrusion 21 has straight line on the outside Skewed inclination corresponding surface 23 has sagittal curvature recess portion in inside (back side).

But in Figure 42 (A), on the non-relative region Z of circle main body 1, prevent from being equipped with mark U as accidentally assembly small Protrusion 54,54.Such small protrusion 54 is replaced to hole 57, the dolly dimple portion of Figure 32~Figure 35, Figure 37~Figure 40 for having been described above 59 come to set up be also free.

It, should be by if being thought of as the mistake assembly of the figure turned upside down in the use state shown in Figure 38, Figure 39 The 2nd protrusion 22 for being configured at the innermost portion of corner part 8 is present in lower section, and the 1st protrusion 21 is configured in innermost portion, it is clear that be difficult to The mode that fluid leaks is not sealed.

Particularly, it will also realize that in Figure 33, Figure 34, compared with the size of circle main body 1, the 1st protrusion 21,22 pole of the 2nd protrusion It is small, it is extremely difficult to the innermost portion that with the naked eye which judgement should make correspond to corner part 8(in operation).In the present invention, such as Figure 35 It is illustrated, if turning over, by detecting by an unaided eye in assembling work, it can simply and clearly judge the dress of sealing ring S With direction.That is, being capable of mistake assembly that is simple and being prevented securely from sealing ring S.In addition, such as from Figure 35 it is found that can be almost The shape of sealing ring S, construction is not set to set up mark U in the case where complicating.

But, it is sometimes desirable in order to reduce frictional resistance and with drawer at movable side by sealing surface P₁Corresponding 1st sliding contact Face 26(26A) on form groove.It, will be multiple such as Figure 33~as shown in Figure 35 at the sealing ring S for being formed with such groove Small has bottom outlet 57 to separate predetermined distance in the circumferential to be arranged, and thus also has not and for reducing the above-mentioned recessed of frictional resistance In the case that slot mixes, the advantages of capable of positively identifying.In addition, preventing from using mark U as accidentally assembly, it is not limited to above-mentioned implementation Example, have for by opposed area Z by text, figure, mark to set up in a concave shape or convex be also preferred in the case of, in turn, will be upper State embodiment and text, figure, mark and with being also free.

More than, as based on illustrated by Figure 32~Figure 42, sealing ring of the invention is the circle at the one of circumference with gap 5 Ring-type has circle main body 1, the 1st protrusion 21, the 2nd protrusion 22, and aforementioned 1st protrusion 21, the 2nd protrusion 22 are from the 1st of the circle main body 1 End 11, the 2nd end 12 are protrusively provided in the circumferential, in turn, are equipped on by orthogonal two by sealing surface P₁、P₂It is formed Corner part 8, be crimped on above-mentioned by sealing surface P₁、P₂Realize that sealing function, aforementioned seal circle are configured to, in addition to it is orthogonal Two it is above-mentioned by sealing surface P₁、P₂The wrong assembly of non-relative region Z setting except opposite sealing opposed area X prevents With mark U, so can be prevented securely from, (in the table) up and down in assembling (assembly) operation to scroll compressor is opposite Assembly defect (accidentally assemble).Thereby, it is possible to by the delicate and brand-new shape about the 1st minimum protrusion 21 and the 2nd protrusion 22 The achievement of the research and development of shape, inerrably brings into play at the scene.

It is injection moulded in addition, whole by thermoplastic resin composition, and above-mentioned accidentally assembly is prevented from being passed through with mark U above-mentioned Injection moulding is to be integrally formed, so can prevent from being simply to set well with mark U efficiency by accidentally assembly.Moreover, logical The injection moulding of thermoplastic resin composition is crossed, can be easy, inexpensively obtain high-quality, high performance sealing ring.

Then, Figure 43~Figure 49 is the figure for indicating the 12nd~the 15th embodiment and each variation of the invention.It is whole Shape etc. structure it is roughly the same with structure shown in above-mentioned FIG. 1 to FIG. 31, so omitting repeated explanation, but in Figure 43~figure In 49 embodiment and variation, has 63 this point of the 3rd protrusion and be the largest feature.

Hereinafter, explaining in detail.In the embodiment shown in Figure 43, Figure 44, Figure 45 and variation, the cross of main body 1 is enclosed Cross sectional shape is rectangle, and the 1st protrusion 21 and the 2nd protrusion 22 use the rectangular cross section for enclosing main body 1 like that as shown in figure 44 Cut-off rule Lc bis- divides, and corresponds to each other by the 1st corresponding surface 41 and the 2nd corresponding surface 42, and in turn, the 1st protrusion 21 is in the 1st corresponding surface 41 opposite side is formed with portion's of pruning (recess portion) 33.In addition, the other accompanying drawings label of Figure 44 with and the identical attached drawing such as Figure 10 Label corresponds to, and omits the description here.

Also, above-mentioned 3rd protrusion 63 is protrusively provided in the circumferential from the 1st end 11 of circle main body 1, the 3rd protrusion 63 As shown in Figure 43, Figure 44, Figure 45, for the 1st protrusion 21 (to be collided, interfered relative to other objects from 33 side of the portion of pruning Deng) protection.

That is, 1st protrusion 21 is minimum part compared with circle main body 1 is whole, unintentionally being collided with other objects or From fall to ground, on desk when, there is simply a possibility that by crack, the breakage lost etc. in the 1st protrusion 21.Particularly, Due to being thermoplastic resin composition, it is easy to produce above-mentioned breakage, such breakage is protected from 33 side of portion of pruning of the 1st protrusion 21 Shield is to play the function (effect) that the 1st protrusion breakage prevents.

In the legend shown in Figure 43, Figure 44 (A), Figure 46, indicate that the 3rd protrusion 63 is the situation of square, at Figure 44 (B) In, indicate the square with chamfering 64.Moreover, with corner 18 represented in the Fig. 7 having been described above, form the corner The 18 consistent mode in right angle both sides, the 3rd protrusion 63 is configured near corner 18.

Also, overlap in the 1st protrusion 21 and the 2nd protrusion 22 gap closed state (referring to the Fig. 5 having been described above and In Fig. 6), each portion's size in cross section of the 1st protrusion 21, the 2nd protrusion 22, the 3rd protrusion 63 is set, the 1st protrusion 21 and the 2nd is set to Size (the ruler that protrusion 22 and the 3rd protrusion 63 do not exceed from the contour line (generally rectangular G shown in Fig. 7) of the cross section of circle main body 1 Very little tolerance).

That is, as shown in figure 44, on 4 sides for the generally rectangular G for making the 1st protrusion 21, the 2nd protrusion 22, the 3rd protrusion 63 and Fig. 7 In the case where being overlapped (consistent), formed between (the 1st protrusion 21) inclination corresponding surface 23 and (the 2nd protrusion 22) inclined surface 24 Small seal clearance g.The full-size of seal clearance g wishes that setting becomes 10 μm or more and 100 μm or less.

In this way, in gap closed state, and so that the 1st protrusion 21, the 2nd protrusion 22, the 3rd protrusion 63 and generally rectangular G It, will most in the state that the mode that four sides are overlapped keeps corresponding two sides 23,24(the 1st, the 2nd corresponding surface 41,42) seal clearance g maximum Wide arc gap size is set to 10 μm or more and 100 μm hereinafter, so being able to suppress corresponding from corresponding two sides 23,24(the 1st, the 2nd Face 41,42) leakage, and the 1st protrusion 21, the 2nd protrusion 22, the 3rd protrusion 63 do not exceed from generally rectangular G, sealing performance also can Enough further increase.Also, it will also realize that from Figure 43 (B), the 1st protrusion 21 and the 3rd protrusion 63 are by from the 1st end 11 of circle main body 1 End face 11Z parallel shape be protrusively provided.

Then, it in the embodiment shown in Figure 45 (A) (B), along the side 65 for linking corner 18 and corner 19, is equipped with thin 3rd protrusion 63 of wall flaps shape.In the case where the Figure 45, in gap closed state, and so that the 1st protrusion 21 and the 2nd protrusion In the state that 22 make the seal clearance g maximum on corresponding two sides 23,24 with the 4 side coincidence systems of generally rectangular G, by maximal clearance ruler It is very little to be set to 10 μm or more and 100 μm hereinafter, the 1st protrusion 21 and the 2nd protrusion 22 be not (generally rectangular from the contour line of circle main body 1 G) exceed.Additionally, it is desirable that as shown in Figure 45 (A) (B), by the 1st protrusion 21 and the 2nd protrusion 22 and the 3rd protrusion 63 be configured to not from The contour line (generally rectangular G) of circle main body 1 exceeds.

But in the embodiment shown in Figure 45 (A), spacer portion 66 is formed on the upper end and the 1st protrusion of the 3rd protrusion 63 Between 21 the 1st contact piece portion 31.In the embodiment shown in Figure 45 (B), the upper end of the 3rd protrusion 63 of thin-walled sheet and the 1st convex Portion 21 is continuous.Also, the whole a part by the 3rd protrusion 63 and the 1st protrusion 21 on one side 65 is formed.In this way, the 3rd is convex Portion 63 realizes the effect reinforced, and mold structure is simple, and this is favourable.

As shown in figure 46, in a compressed state, sealing ring S is pushed by drawer at movable side by sealing surface P₁It is close with affixed side Cover P₁The corner part 8 of formation, by the pressure P of fluid L₀, 21 flexible deformation of the 1st protrusion and be pushed to the 2nd protrusion 22.

Can dynamic vortex 7 carry out eddying motion, thus the 1st sliding contact surface 26 and the 2nd sliding contact surface 27 and object Part, I.e. by sealing surface P₁, by sealing surface P₂It contacts (crimping), by the pressure P of fluid L₀, the 1st protrusion 21 is pushed to the 2nd protrusion 22. 1st protrusion 21 pushes the 2nd protrusion 22, and thus the leakproofness between the 1st protrusion 21 and two components of the 2nd protrusion 22 improves, from close The leakage for sealing the fluid L of gap g is reduced.It such as will also realize that from Figure 44 and Figure 45, on the 1st protrusion 21 and the 2nd protrusion 22, by even Continuous face is formed with the 1st sliding contact surface 26 and the 2nd sliding contact surface 27.Other, manufacturing method, surface roughness, material etc. with Each embodiment illustrated in FIG. 1 to FIG. 42 is identical.

Based on Figure 46, illustrate the relationship of the 3rd protrusion 63 and the 1st, the 2nd protrusion 21,22.Such as Figure 46 and Figure 43, Figure 44, figure 45(A) illustrated, the 3rd protrusion 63 is separated with the 1st protrusion 21, is protrusively provided from the 1st end 11.As shown in figure 46, pressure is born Power P₀And 21 flexible deformation of the 1st protrusion and play sealing (seal) function, but the 3rd protrusion 63 and sealing (seal) function without Relationship exists as so-called " void place (ダ ミ ー) ", is that the breakage of the 1st protrusion 21 of protection prevents from using protrusion.From 33 side of the portion of pruning The breakage that the 1st protrusion 21 occurs crack, loses etc. with the interference of other objects is protected, according to circumstances, the 3rd protrusion 63 itself is broken It damages and absorbs impact, protect the 1st protrusion 21.

In addition, the 3rd protrusion 63 can also play the function of reinforcing a part of the 1st protrusion 21 in Figure 45 (B).

Figure 47 (A) (B) is to indicate of the invention 14th, the 15th embodiment cross-sectional view.

The generally rectangular G for enclosing main body 1 is rectangle, constitutes the side (short side) of the 1st sliding contact surface 26 than constituting the 2nd sliding The side (long side) of contact surface 27 is short.That is, (in use state, with drawer at movable side by sealing surface P₁Sliding contact) the 1st sliding connect The frictional resistance of contacting surface 26 reduces, and sliding property improves.

As shown in Figure 47 (A) (B), the cross-sectional shape of the 2nd protrusion 22 is formed as triangle, and the 1st protrusion 21 has and inclines Inclined tab portion 30, aforementioned inclination piece portion 30 have the inclination with the inclined surface 24 on one side of the quadrangle of the 2nd protrusion 22 in parallel shape Corresponding surface 23.Tilting piece portion 30 on the outside has inclination corresponding surface 23, is formed in inside and prunes portion 33.

Figure 47 (A) by the generally square setting rectangularity of the embodiment of Figure 45 (A), the 3rd protrusion 63 along by corner 18, It is described identical as Figure 45 (A) that the longer sides 65 of 19 connections are formed as the structure of thin-walled sheet etc., omission repeated explanation.In addition, Figure 47 (B) indicates the portion 33 of pruning for having corner angle of Figure 47 (A) being changed to the case where pruning portion 33 of sagittal curvature.3rd protrusion 63 is identical as Figure 47 (A) and (B), and solid line is separated with the 1st protrusion 21, realizes the effect illustrated in Figure 45 (A).In addition, also excellent Choosing, in each of Figure 47 (A) (B), as shown in double dot dash line 67, prolongs the 3rd protrusion 63(along one side 65 upwards Stretch) link with the 1st contact piece portion 31 of the 1st protrusion 21.It is identical as situation described in Figure 45 (B) that it acts on (effect).

Then, Figure 48 and Figure 49 are also represented by various modifications example.It is in addition to the cross-sectional shape of circle main body 1 is circular aspect In addition, structure identical with Figure 43~Figure 46, identical appended drawing reference indicate identical structure.

As shown in Figure 48 and Figure 49, the profile for the circular cross section that the 1st protrusion 21 and the 2nd protrusion 22 will enclose main body 1, which is used, to be divided Secant Lc bis- divides, and faces each other by the 1st corresponding surface 41, the 2nd corresponding surface 42.In the phase of the 1st corresponding surface 41 of the 1st protrusion 21 Portion 33 is pruned in reverse side formation, and in 33 side of the portion of pruning, the 1st protrusion breakage is prevented with the 3rd protrusion 63 from the 1st end 11 in circumferential direction On be protrusively provided.

Moreover, as shown in Figure 48 (A) (B) (C), in the gap closed state that the 1st protrusion 21 and the 2nd protrusion 22 overlap Under, the 1st protrusion 21 and the 2nd protrusion 22 do not exceed from the circular contour line of circle main body 1.In addition, such as Figure 48 (A) (B) (C) institute Show, it is desirable to all be configured to not exceed from the circular contour line of circle main body 1 by the 1st, the 2nd, the 3rd protrusion 21,22,63.

In Figure 48 (A) and Figure 49, pruning portion 33 is biggish arch, and the 1st protrusion 21 is made of inclination piece portion 30, aforementioned Tilt the bottom surface sections 25 that piece portion 30 has the 1st corresponding surface 41 and angled straight lines shape in parallel.In addition, two the 3rd protrusions 63, 63 are protrusively provided from the end face 11Z of the 1st end 11 of circle main body 1.Specifically, each 3rd protrusion 63 is substantially a quarter Circle is equipped on separating shape by the position of both ends 21A, 21A protection of the 1st protrusion 21.

Then, in the embodiment shown in Figure 48 (B), the cross sectional shape for pruning portion 33 is roof type, the 1st protrusion 21 be There is the U-shaped in nail portion 43,43 to follow closely shape at both ends.Also, 33 side of portion is pruned at this, two that circle peak type (ball mountain type) is arranged are the 3rd convex Portion 63,63 protects above-mentioned nail portion 43,43.

Then, in Figure 48 (C), the cross sectional shape for pruning portion 33 is rugby shape, and the 1st protrusion 21 has straight line on the outside The 1st skewed corresponding surface 41, and there is sagittal curvature recess portion in inside (back side).Also, generally circular 3rd protrusion 63 are equipped on the position in the portion of pruning 33.

In addition, it is also free that the shape for pruning portion 33 changes design in addition to this, and the shape of the 3rd protrusion 63 is also certainly By what is changed, as long as playing the function of protection, so that the breakage for being effectively prevented the 1st protrusion 21 is enough.

More than, it is such as described in detail, is related to sealing ring of the invention and is formed as the annular shape at the one of circumference with gap 5 Global shape, there is circle main body 1 and the 1st protrusion 21, the 2nd protrusion 22, aforementioned 1st protrusion 21, the 2nd protrusion 22 are from the circle main body 1 the 1st end 11, the 2nd end 12 are arranged with being highlighted in the circumferential, are configured to, whole by thermoplastic resin composition one Ground is formed, and the cross-sectional shape of above-mentioned circle main body 1 is rectangle or circle, and above-mentioned 1st protrusion 21 and the 2nd protrusion 22 are by above-mentioned circle master The cross section cut-off rule Lc bis- of the rectangle of body 1 divides, and faces each other by the 1st corresponding surface 41, the 2nd corresponding surface 42, in turn, on Stating the 1st protrusion 21 is to be formed with the cross-sectional shape in the portion of pruning 33 in the opposite side of above-mentioned 1st corresponding surface 41, moreover, upper 33 side of the portion of pruning is stated, the 1st protrusion breakage prevents from being protrusively provided in the circumferential with the 3rd protrusion 63 from above-mentioned 1st end 11, on The 1st protrusion 21 and above-mentioned 2nd protrusion 22 are stated under the gap closed state to overlap, above-mentioned 1st protrusion 21 and above-mentioned 2nd convex Portion 22 does not exceed from the contour line of the cross section of above-mentioned circle main body 1, so the seam areas of the 1st protrusion 21 and the 2nd protrusion 22 Leakproofness is enhanced, and can reduce the fluid leakage from the seam areas, particularly, can be by the 3rd protrusion 63, effectively Prevent the 1st protrusion 21 and other objects minimum compared with enclosing main body 1 from interfering and damaged, the leakproofness of above-mentioned seam areas It is maintained.It by the injection moulding of thermoplastic resin composition, can easily be sized, can be easy, inexpensively obtain High-quality, high performance sealing ring, can omit the machining such as cutting, grinding, cutting, and the generation of material loss is also less.

3rd protrusion 63 also can be easy landform by the injection moulding of above-mentioned material simultaneously with the 1st, the 2nd protrusion 21,22 At.

Description of symbols

1 circle main body

5 gaps

11 the 1st ends

12 the 2nd ends

13 maximum sized positions

15 corners

18 corners

20 notch (cliff portion)

21 the 1st protrusions

22 the 2nd protrusions

26 the 1st sliding contact surfaces

27 the 2nd sliding contact surfaces

29 notch

33 prune portion (recess portion)

41 the 1st corresponding surfaces

42 the 2nd corresponding surfaces

63 the 3rd protrusions

G is generally rectangular

G ' circular wheel profile

Lc cut-off rule

M₁、M₂It is circumferential

P₁Drawer at movable side is by sealing surface

P₂Affixed side is by sealing surface

P₅Central point

R₁₃、R₁、R₂Radius of curvature

S sealing ring

Accidentally assembly prevents from using mark U

Opposed area is used in X sealing

Z non-relative region.

Claims (13)

1. a kind of sealing ring is formed as the circular global shape at the one of circumference with gap (5), there is circle main body (1) and the 1st protrusion (21), the 2nd protrusion (22), aforementioned 1st protrusion (21), the 2nd protrusion (22) are by from the 1st of the circle main body (1) End (11), the 2nd end (12) are protrusively provided in the circumferential, which is characterized in that

It is whole to be integrally formed by thermoplastic resin composition,

The cross-sectional shape of above-mentioned circle main body (1) is rectangle, and above-mentioned 1st protrusion (21) and the 2nd protrusion (22) are by above-mentioned circle main body (1) mutual face is come by two points of cut-off rule (Lc), by the 1st corresponding surface (41), the 2nd corresponding surface (42) in the cross section of rectangle Right, in turn, above-mentioned 1st protrusion (21) is to be formed with the transversal of the portion of pruning (33) in the opposite side of above-mentioned 1st corresponding surface (41) Face shape,

It is set to, under the gap closed state that above-mentioned 1st protrusion (21) and above-mentioned 2nd protrusion (22) overlap, the above-mentioned 1st The size that protrusion (21) and above-mentioned 2nd protrusion (22) do not exceed from the contour line of the cross section of above-mentioned circle main body (1),

Keep above-mentioned 1st protrusion (21) and above-mentioned 2nd protrusion (22) and the contour line of the cross section of above-mentioned circle main body (1) consistent Under state, between the inclination corresponding surface (23) of above-mentioned 1st protrusion (21) and the inclined surface (24) of above-mentioned 2nd protrusion (22), shape At small seal clearance (g), the full-size of the seal clearance (g) be configured to 10 μm or more and 100 μm hereinafter,

In the cross section of above-mentioned 1st protrusion (21), above-mentioned portion (33) of pruning is by the above-mentioned cut-off rule (Lc) along arc-shaped The shape that the short straight line portion at arc sections and its both ends is constituted, or by along linear above-mentioned cut-off rule (Lc) straight line portion and The shape that the short straight line portion at its both ends is constituted.

2. a kind of sealing ring is formed as the circular global shape at the one of circumference with gap (5), there is circle main body (1) and the 1st protrusion (21), the 2nd protrusion (22), aforementioned 1st protrusion (21), the 2nd protrusion (22) are by from the 1st of the circle main body (1) End (11), the 2nd end (12) are protrusively provided in the circumferential, which is characterized in that

It is whole to be integrally formed by thermoplastic resin composition,

The cross-sectional shape of above-mentioned circle main body (1) is, will be with drawer at movable side by sealing surface (P₁) and affixed side by sealing surface (P₂) turn Corner (8) is corresponding, about generally rectangular (G) a corner (15) be diagonal above-mentioned generally rectangular (G) another corner (18) notch is formed notch (20),

Above-mentioned 1st protrusion (21) and the 2nd protrusion (22) will have the above-mentioned circle main body of the cross-sectional shape of above-mentioned notch (20) (1) cross section is faced each other by two points of cut-off rule (Lc) by the 1st corresponding surface (41), the 2nd corresponding surface (42), above-mentioned 1st protrusion (21) is to be formed with to prune the transversal of portion (33) in sequential like with the above-mentioned notch (20) of above-mentioned circle main body (1) Face shape,

It is set to, under the gap closed state that above-mentioned 1st protrusion (21) and above-mentioned 2nd protrusion (22) overlap, the above-mentioned 1st The size that protrusion (21) and above-mentioned 2nd protrusion (22) do not exceed from above-mentioned generally rectangular (G),

Keep above-mentioned 1st protrusion (21) and above-mentioned 2nd protrusion (22) and the contour line of the cross section of above-mentioned circle main body (1) consistent Under state, between the inclination corresponding surface (23) of above-mentioned 1st protrusion (21) and the inclined surface (24) of above-mentioned 2nd protrusion (22), shape At small seal clearance (g), the full-size of the seal clearance (g) be configured to 10 μm or more and 100 μm hereinafter,

In the cross section of above-mentioned 1st protrusion (21), above-mentioned portion (33) of pruning is by the above-mentioned cut-off rule (Lc) along arc-shaped The shape that the short straight line portion at arc sections and its both ends is constituted, or by along linear above-mentioned cut-off rule (Lc) straight line portion and The shape that the short straight line portion at its both ends is constituted.

3. sealing ring as claimed in claim 1 or 2, which is characterized in that

Above-mentioned circle main body (1) and drawer at movable side are by sealing surface (P₁) sliding contact the 1st sliding contact surface (26) have for rub resistance The shallow trough shape notch (29) that power reduces.

4. sealing ring as claimed in claim 1 or 2, which is characterized in that

Above-mentioned circle main body (1) and drawer at movable side are by sealing surface (P₁) the 1st sliding contact surface (26) of sliding contact is configured to, by rubbing The low material of coefficient covers to be formed to reduce frictional resistance.

5. sealing ring as claimed in claim 1 or 2, which is characterized in that

The above-mentioned circle main body (1) of opening-wide state is configured to, the central point (P relative to above-mentioned gap (5)₅), at 180 ° ± 30 ° There are radius of curvature (R in range₁₃) it is maximum sized position (13), it is set to, respectively from the maximum sized position (13) To above-mentioned 1st end (11), the 2nd end (12), in circumferential direction (M₁、M₂) on approach, radius of curvature (R₁、R₂) reduce, upper It states under the gap closed state that the 1st protrusion (21) and the 2nd protrusion (22) overlap, global shape is in circular.

6. sealing ring as claimed in claim 1 or 2, which is characterized in that

Prune portion (33) side above-mentioned, the 1st protrusion breakage prevent with the 3rd protrusion (63) by from above-mentioned 1st end (11) in circumferential direction On be protrusively provided.

7. sealing ring as claimed in claim 1 or 2, which is characterized in that

The crooked elastic rate of above-mentioned thermoplastic resin composition is 1500MPa or more, 6000MPa or less.

8. sealing ring as claimed in claim 1 or 2, which is characterized in that

Above-mentioned thermoplastic resin composition is PPS, that is, polyphenylene sulfide resin composition.

9. sealing ring as claimed in claim 1 or 2, which is characterized in that

By the arithmetic mean roughness on the surface of the 1st sliding contact surface (26) of above-mentioned circle main body (1) and the 2nd sliding contact surface (27) Degree (Ra) is set to, and is measured as 0.1 or more 2.0 or less according to JIS B 0601.

10. sealing ring as claimed in claim 1 or 2, which is characterized in that

1st sliding contact surface (26) of above-mentioned circle main body (1) has shallow trough shape notch (29).

11. sealing ring as claimed in claim 1 or 2, which is characterized in that

Above-mentioned 1st protrusion (21) be formed two positions be bent " (" the shape i.e. cross-sectional shape of bracket shape, it is above-mentioned The inclination piece portion (30) of 1st protrusion (21) is formed with as the above-mentioned recess portion for pruning portion (33), aforementioned recess be in bracket " (" Outside there is inclination corresponding surface (23), and be in bracket " (" inside there are bottom surface (25).

12. sealing ring as claimed in claim 1 or 2, which is characterized in that

The sealing ring is equipped on by orthogonal two by sealing surface (P₁、P₂) formed corner part (8), be crimped on above-mentioned quilt Sealing surface (P₁ 、P₂) Lai Shixian sealing function,

In addition to above-mentioned by sealing surface (P with orthogonal two₁、P₂) the non-opposite area of opposite sealing other than opposed area (X) On domain (Z), wrong assembly, which is arranged, to be prevented with mark (U).

13. sealing ring as claimed in claim 12, which is characterized in that

It is whole to be injection molded by thermoplastic resin composition, and prevent from above-mentioned accidentally assembly from passing through above-mentioned note with mark (U) Molding is penetrated to be integrally formed.