JP3999852B2 - Scroll fluid machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a scroll fluid machine that compresses, expands, and pumps fluid, and in particular, at least one of sliding surfaces that slide relatively is formed of a synthetic resin, or one of the sliding surfaces is The present invention also relates to a scroll fluid machine configured by covering a part of a scroll body with an elastic member formed of a synthetic resin.
[0002]
[Prior art]
  Conventionally, a scroll fluid machine in which a fixed scroll and a turning scroll, or a driving scroll and a driven scroll are formed of a metal member such as aluminum, and a synthetic resin having self-lubricating properties is interposed between sliding parts sliding on each other. Is well known.
[0003]
  Aluminum as a metal member has excellent formability as an aluminum die-casting, excellent cutting performance after molding, and facilitates the provision of products with good dimensional accuracy in the thrust direction and radial direction of the drive shaft. When combined with scroll, or driving scroll and driven scroll, etc., the accumulated error due to the combination results in hindering the airtightness of the sealed space formed by the lap, and the wrap tip is used to increase the airtightness of the sealed space. It is necessary to accurately manage the dimensions of the mirror surface of the other party and the turning error between the laps facing each other, which requires advanced technology.
[0004]
[Problems to be solved by the invention]
  Therefore, a chip seal molded with synthetic resin is interposed between the tip of the wrap and the opposite mirror surface to absorb manufacturing and assembly errors, and the turning error between the facing wraps can be reduced to the turning range for the turning scroll or the driven scroll. Although it is restricted by a rotation prevention mechanism that restricts, it is not always sufficient, and there is a problem that a fretting phenomenon is generated on the wrapping wall surface that is in sliding contact with each other and durability is lowered.
[0005]
  Further, according to the above-described prior art, the scroll mechanism is formed of a metal member such as aluminum and has a weight, and there is a problem that a drive source with a large output is required to drive the scroll mechanism.
[0006]
  Further, according to the above-described prior art, the tip seal is consumed quickly between the counterpart mirror surface formed of aluminum and the tip seal formed of synthetic resin, and the tip seal needs to be replaced. The trouble of taking out the chip seal from the groove at the tip of the wrap and cleaning the wear dust of the chip seal in the groove is troublesome.
[0007]
  The present invention has been made in view of the above problems, and an object of the present invention is to provide a scroll fluid machine that can be driven by a drive source with a small output.
  Another object of the present invention is to provide a scroll fluid machine that does not cause a fretting phenomenon on a lap wall surface that faces and slidably contacts and does not deteriorate durability.
  Another object of the present invention is to provide a scroll fluid machine in which an elastic member interposed between a lap tip and a mating sliding contact surface can be easily replaced.
[0008]
[Means for Solving the Problems]
  Claim 1 of the present invention is a scroll fluid machine in which a fluid is hermetically sealed by a sliding surface that slides relatively, and is compressed, expanded, or pumped.
  At least a scroll mechanism having the sliding surface and driven by a driving source is formed of synthetic resin.One of the sliding surfaces is integrally formed with the scroll mechanism and has an elastic structure that applies a pressing force to the other of the sliding surfaces, and the elastic structure extends to the upper end of the wrap. Formed by folded solidsIt is characterized by.
[0009]
  In this claim 1, the scroll mechanism having the sliding surface and driven by a drive source is, for example, the orbiting scroll 12A in FIG. 1 or a drive scroll that drives a driven scroll, although not shown, or It means a scroll that includes a driven scroll or the like and is driven directly or indirectly by a drive source.
[0010]
  The scroll is made of a synthetic resin, and the other scrolls may be a synthetic resin or a metal member.
  Since the present invention is configured as described above, it is possible to provide an economical and compact scroll fluid machine that can be driven by a drive source having a small output.
[0011]
  Claims1As described above, one of the sliding surfaces is formed integrally with the scroll mechanism and has an elastic structure that applies a pressing force to the other sliding surface. It is an effective means.
  AndBeforeThe elastic structure is formed by a folded body that extends to the top of the wrap.Is done.
[0012]
  As described above, when the sliding surface of the scroll mechanism is integrally formed of synthetic resin, the number of parts is reduced, and in order to cope with a decrease in airtightness due to wear of the sliding surface, It is only necessary to replace the entire mechanism, and there is no need for troublesome operations such as replacing the tip seal fitted in the groove on the upper surface of the wrap as in the prior art.
[0013]
  Further, when the elastic structure is constituted by a folded upright, the space between the upper portion of the wrap and the other mirror surface is adjusted by the spring property of the upright of the upright, but the upright is bent and arranged. Therefore, this adjustment amount can be set larger than the vertical expansion / contraction amount of the tip seal fitted in the groove at the top of the conventional lap, and the dimension between the boundary surfaces located above and below the sealed space for compressing the fluid can be set rougher than before. .
[0014]
  Claims2As described above, the fixed scroll is formed of a synthetic resin, and an elastic structure that is in sliding contact with the sliding surface of the scroll mechanism by applying a pressing force may be integrally formed with the fixed scroll. It is an effective means.
[0015]
  As described above, when the elastic structure of the fixed scroll is formed integrally with the fixed scroll using synthetic resin, the number of parts is reduced, and the decrease in airtightness due to wear of the sliding surface of the elastic structure is dealt with. In order to do this, the entire fixed scroll has only to be exchanged, and there is no need for the troublesome operation of exchanging the tip seal fitted in the groove on the upper surface of the wrap as in the prior art.
[0016]
  Claims3As described above, it is desirable that the counterpart sliding surface that is in sliding contact with the elastic structure has a sliding surface that is harder than the elastic structure.
  Here, since the elastic structure is formed integrally with a scroll mechanism made of synthetic resin, the other of the sliding surfaces that are in sliding contact with the elastic structure is a sliding surface that is harder than the elastic structure. For example, a hard synthetic resin, a metal member, etc. are included.
[0017]
  And since the members with different hardness of the sliding surfaces are used, the elastic structure, which is a soft member, wears faster than the other, and both do not wear at the same time. By doing so, the operation can be continued and it is economical.
[0018]
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[0019]
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[0020]
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[0021]
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[0022]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specified. Not too much.
[0023]
  FIG. 1 is a cross-sectional view of an essential part showing a schematic configuration relating to the embodiment of the first invention, FIG. 2 is a schematic cross-sectional view of a scroll fluid machine applied to the present invention, and FIG. It is -A sectional drawing.
[0024]
  As shown in FIG. 2, the scroll fluid machine 1 applied to the present invention is connected to a fixed scroll 11, a fixed scroll housing 13 mounted on the fixed scroll 11, and a drive shaft 3 of the motor 2 in its inner space. It is comprised with the orbiting scroll 12 arrange | positioned possible.
[0025]
  The fixed scroll 11 is formed in a triangular cross section as shown in FIG. 3, and at each of the three apexes, a crank pin 22 (FIG. 2) of the pin crank mechanism 10 which is a rotation blocking mechanism of the orbiting scroll is provided. A smaller-diameter opening portion 11h having an opening portion 11g into which the outer circumferences of the bearings 8 and 9 to be fitted are fitted and a step portion for holding the outer ring of the bearing 9 is opened.
[0026]
  A discharge hole 11d communicating with a discharge port 16 (FIG. 2) for discharging a lap compressed gas, which will be described later, is formed at the center of the sliding surface 11c used as a reference surface of the fixed scroll 11 for assembling. The fixed scroll wrap 11a is planted in the vicinity of the discharge hole 11d, and a sliding contact portion 34 is disposed at the tip of the scroll wrap 11a to form a sealed space by sliding contact with the other sliding surface. Yes.
[0027]
  The sliding surface 11c is provided with openings 11e and 11e that communicate with the gas suction port.
  A large number of cooling and reinforcing fins 11 b (FIG. 2) are planted on the bottom surface 11 i outside the fixed scroll 11.
[0028]
  A fixed scroll housing 13 having a base portion 13 a having the same cross-sectional outer shape as that of the fixed scroll 11 is screwed to the upper portion of the fixed scroll 11. A space 13b is provided in the base 13a, and an opening 13f is formed in the space 13b so that external air can flow freely.
  Further, a continuous portion 13d having a space 13c smaller than 13b is provided on the upper portion of the space 13b, and the motor 2 having the drive shaft 3 is disposed on the upper portion.
[0029]
  The orbiting scroll 12 in which the orbiting scroll wrap 12a having a plane facing the wall surface of the fixed scroll wrap 11a is erected in the space 13b of the fixed scroll housing 13 is eccentric from the rotating shaft 3 of the motor 2. The sliding surface 12e, which is pivotally connected via the drive shaft 4 and the bearing 5 and located near the outer periphery on the side opposite to the lap surface, is in sliding contact with the pressing portion 13e of the fixed scroll housing 13. The part 36 is slidably contacted.
[0030]
  Further, a plurality of cooling fins 12b are provided upright on the surface opposite to the orbiting scroll wrap surface, and the orbiting scroll can be cooled by outside air flowing from the opening 13f of the housing 13.
  Further, a sliding contact portion 35 is disposed at the tip of the orbiting scroll wrap 12a to form a sealed space by sliding contact with the other sliding surface.
[0031]
  Three opening holes 12g are opened at the position of the orbiting scroll 12 corresponding to the opening holes 11g of the fixed scroll 11, and bearings 6 and 7 are fitted into the opening holes 12g. A pin 21 is inserted, and two O-rings 23 and 24 are inserted into a groove provided on the outer periphery of the crank pin 21 so that the crank pin 21 can swing in the radial direction in the bearing. ing.
[0032]
  The crank pin 21 is implanted in the crank plate 17 via a spacer 18, a spring washer 32 is interposed between the spacer 18 and the bearing 7, and a bearing 37 is provided on the upper surface of the bearing 6 by a screw 37 via a pressing plate 19. 6 is prevented, and play between the bearing and the crank plate is eliminated to eliminate the vertical play.
[0033]
  A crank pin 22 having an axial center is planted on a side surface of the crank plate 17 opposite to the crank pin 21 at a distance p from the axial center of the crank pin 21, and the crank pin 22 is fixed to the fixed scroll 11. It is inserted in the inner ring of the bearings 8 and 9 which are inserted in the opening hole 11g.
[0034]
  In the crank pin 22, a spring washer 33 is interposed between the crank plate 17 and the bearing 8, and the upper and lower backlash of the bearing is eliminated by a screw 38 via a pressing plate 20 on the upper surface of the bearing 9.
[0035]
  Next, the operation of the scroll fluid machine according to the present embodiment configured as described above will be described.
  In FIG. 2, when the motor 2 rotates and the orbiting scroll 12 starts the orbiting motion, the fluid taken in from the tips of the wraps 11a and 12a is a crescent-shaped sealed space formed by the wraps 12a and 11a, respectively. And is discharged to the discharge port 16 from the discharge hole 11d opened in the central portion.
[0036]
  In this process, the high heat generated by being compressed by the sealed space is cooled by the cooling fins 12b provided on the back surface of the orbiting scroll 12 being disturbed by the rotation of the fins through the air flowing from the openings 13f.
  The high heat is cooled by the cooling fins 11 b of the fixed scroll 11.
[0037]
  In the manufacturing and assembling process, when an interference portion is generated between the drive portion and the fixed portion due to a cumulative error due to the combination of the orbiting scroll and the fixed scroll housing, the force in the direction in which the laps collide with each other causes the O-ring of the crankpin 21 Is absorbed by deformation.
[0038]
  In this embodiment, as shown in FIG. 1, the orbiting scroll 12A, the fixed scroll 11A, and the fixed scroll housing 13A are made of DuPont (registered trademark) No. 3 Bespel No. 2, No. 211 Bespel, The slidable contact portions 34, 35, and 36 are formed of a polyimide synthetic resin such as Crossflon 905 of Damcrosley (registered trademark), and the pressing portions are extended from the wraps 12a, 11a or the fixed scroll housing 13A. The standing pieces erected on 13e are bent to form sliding contact pieces 34a, 35a, 36a, respectively.
[0039]
  As described above, when the elastic structure is constituted by the folded upright piece, the distance between the upper portion of the wrap and the other mirror surface is adjusted by the spring property of the upright piece, and this adjustment amount is obtained by bending the upright piece. Can be set larger than the vertical expansion / contraction amount of the tip seal fitted in the groove at the top of the conventional wrap, and the dimension between the upper and lower boundaries of the sealed space for compressing the fluid can be set rougher than before.
[0040]
  In this embodiment, both the orbiting scroll and the fixed scroll have been described using synthetic resin. However, the present invention is not necessarily limited to this, and a combination of synthetic resin and a metal member may be used. It is.
[0041]
  The sliding contact surfaces 12c, 11c, and 12e that are in sliding contact with the sliding contact surfaces 34b, 35b, and 36b of the sliding contact pieces 34a, 35a, and 36a have higher hardness and friction resistance than the sliding contact surfaces 34b, 35b, and 36b. It is desirable to embed a low metal plate or coat a metal material. By comprising in this way, the turning driving force of a turning scroll can be reduced.
[0042]
  In the embodiment of FIG. 2, ball bearings are used for the bearings 5, 6, and 7, but needle bearings may be used, and the needle bearings have a larger error in the thrust direction than the ball bearings. However, the error can be absorbed by the elastic structure of the standing piece.
[0043]
  4 is a view of the fixed scroll wrap 11a having the slidable contact portion 34 as viewed from above, and FIG. 5 is a view showing the shape of the wrap 11a before being folded.
  In FIG. 5, standing pieces 14A are planted from the upper end of the lap 11a, and the standing pieces 14A are provided with notches 14Aa at a predetermined interval from the center of the fixed scroll 11A. Increases from the center to the periphery.
[0044]
  When the standing piece 14A is bent as shown in FIG. 1, the inner wall surface and the outer wall surface of the wrap have different lengths in the area where the wrap has a sharp curved surface at the center portion of the scroll. Internal stress acts on the upper edge 14Ab of the piece 14A in the contracting direction, but since the notches 14A are provided at a predetermined interval, the amount of contraction is absorbed by the notches 14Aa.
[0045]
  When the upright piece 14A is bent from the inner side to the outer side of the wrap wall surface, the upper edge 14Ab of the upright piece 14A is subjected to internal stress in the extending direction, but the cutout portions 14A are provided at predetermined intervals. The extension amount is absorbed by separating both end edges of the notch 14Aa.
[0046]
  It is desirable that the upright piece 14A is formed by being bent by about 30 ° to 45 ° in the bending direction. In this state, when the fixed scroll and the orbiting scroll are combined, it is automatically determined without bending. Bent to the position.
[0047]
  6-13 is a figure which shows other embodiment of the sliding contact part which concerns on this invention.
  In FIG. 6, as shown in FIGS. 6A and 6B, standing pieces 14 </ b> B are planted from the upper end of the wrap 11 a, and the standing pieces 14 </ b> B have a pitch of a predetermined interval from the center portion side of the fixed scroll 11 </ b> B. The notch portion 14Ba is provided, and the pitch interval increases from the central portion toward the peripheral portion.
[0048]
  The standing piece 14B is further provided with a long hole 14Bb at a lower position corresponding to the notch 14Ba, and provided with narrow grooves 14Bc, 14Bd, and 14Be that become valleys when folded.
[0049]
  When the bending process is performed, the inner wall surface and the outer wall surface of the wrap are different in length in the area where the lap has a sharp curved surface at the center portion of the scroll, but the notches 14Ba and the long holes 14Bb are provided at predetermined intervals. Therefore, the amount of shrinkage is absorbed by these.
[0050]
  And it can fold as shown in (c) and can obtain the sliding contact part whose adjustment amount of an up-down direction is larger than one sliding contact part shown in FIG.
  Further, if the number of bendings is increased as shown in (d), the elongated hole 14Bb can be made longer and the adjustment amount in the vertical direction can be further increased accordingly.
[0051]
  Even if the bending direction is bent from the inner side to the outer side of the wrap wall surface, the extension amount is similarly absorbed by the cutout portion 14Ba and the long hole 14Bb.
[0052]
  In FIG. 7, as shown to (a), the standing piece 14C is planted from the upper end of the lap | wrap 11a, and this standing piece 14C has a pitch of predetermined spacing from the center part side of a fixed scroll, and is notched part 14Ca. The pitch interval increases from the center to the periphery.
[0053]
  When the bending process is performed, the length of the inner wall surface and the outer wall surface of the wrap is different in the area in which the lap has a sharp curved surface at the center portion of the scroll, but the cutout portions 14Ca are provided at predetermined intervals. As a result, the amount of shrinkage is absorbed.
  Even if the bending direction is bent from the inner side to the outer side of the wrap wall surface, the extension amount is similarly absorbed by the notch 14Ca.
[0054]
  It is desirable that the upright pieces 14C and 14C be bent and formed by about 30 ° to 45 ° in the bending direction. In this state, when the fixed scroll and the orbiting scroll are combined, it is automatically performed without bending. Are bent at a predetermined position.
[0055]
  In FIG. 8, as shown to (a), the long standing piece 14D and the short standing piece 14E are planted from the upper end of the lap | wrap 11a, and these standing pieces have a pitch of predetermined spacing from the center part side of a fixed scroll. Notches 14Da and 14Ea are provided, and the pitch interval increases from the center to the periphery.
[0056]
  When performing the bending process, the short upright piece 14E is bent first, the next long upright piece 14D is bent, and two sheets are stacked as shown in FIG.
  In the area where the curved surface of the wrap is drawn in the central part of the scroll, the inner wall surface and the outer wall surface of the wrap are different in length, but the notches 14Da and 14Ea are provided at a predetermined interval. The amount is absorbed.
  In addition, even if the bending direction is bent from the inner side to the outer side of the wrap wall surface, the amount of extension is similarly absorbed by the notch portion 14Da or 14Ea.
[0057]
  In FIG. 9, as shown to (a), the standing piece 14F is planted from the upper end of the lap | wrap 11a, and this standing piece 14F has a notch part 14Fa with a predetermined pitch from the center part side of a fixed scroll. The pitch interval increases from the center to the periphery.
[0058]
  When the bending process is performed, the length of the inner wall surface and the outer wall surface of the wrap is different in the area where the sharp curved surface of the wrap is drawn in the center portion of the scroll, but the notches 14Fa are provided at predetermined intervals. As a result, the amount of shrinkage is absorbed.
  The bending direction is from the inside of the wrap wall surface.On the sideEven if it is bent, the amount of extension is similarly absorbed by the notch 14Fa.
[0059]
  It is desirable that the upright pieces 14F, 14F be bent and formed by about 30 ° to 45 ° in the bending direction. In this state, when the fixed scroll and the orbiting scroll are combined, it is automatically performed without bending. Are bent at a predetermined position.
[0060]
  In FIGS. 10A and 10B, as shown in FIGS. 10A and 10B, standing pieces 14G and 14G are implanted from the upper end of the lap 11a, and the standing piece 14G has a pitch at a predetermined interval from the center side of the fixed scroll. A notch 14Ga is provided, and the pitch interval increases from the center to the periphery.
[0061]
  The standing piece 14G is further provided with narrow grooves 14Dc and 14Db that become valleys when folded.
  When bending is performed, in the area where the lap has a sharp curved surface in the center portion of the scroll, the inner wall surface and the outer wall surface of the wrap are different in length, but the notch portions 14Ga are provided at predetermined intervals. As a result, the amount of shrinkage is absorbed.
  And it can fold as shown in (c) and can obtain the sliding contact part whose adjustment amount of an up-down direction is larger than one sliding contact part shown in FIG.
[0062]
  Even if the bending direction is bent from the inner side to the outer side of the wrap wall surface, the extension amount is similarly absorbed by the cutout portion 14Ba and the long hole 14Bb.
[0063]
  In FIG. 11, as shown in FIG. 11A, a plurality of upright pieces 14 </ b> H are implanted from the center portion toward the peripheral portion from the upper end of the wrap 11 a, and when bent, the upright pieces 14 </ b> H stand up as shown in FIG. The piece 14H is bent.
  The upright pieces 14F and 14F are preferably formed by bending about 30 ° to 45 ° in the bending direction. In this state, when the fixed scroll and the orbiting scroll are combined without bending, It is automatically bent at a predetermined position.
[0064]
  In FIG. 12, as shown in FIG. 12A, when a plurality of upright pieces 14I are implanted from the upper end of the wrap 11a in the direction intersecting with the longitudinal direction of the wrap from the central portion toward the peripheral portion, and bent. , (B), the standing piece 14H is bent.
  The upright pieces 14F and 14F are preferably formed by bending about 30 ° to 45 ° in the bending direction. In this state, when the fixed scroll and the orbiting scroll are combined without bending, It is automatically bent at a predetermined position.
[0065]
  In FIG. 13, as shown in FIG. 13A, a plurality of upright pieces 14 </ b> J are implanted from the upper end of the wrap 11 a in the direction intersecting with the longitudinal direction of the wrap from the central portion toward the peripheral portion. Standing pieces 14K are planted along the direction. When bending is performed, the upright pieces 14J and 14K are bent as shown in FIG.
[0066]
  In the above description, the upright piece is bent in the upright state and then bent. However, in the simple shape as shown in FIGS. 5 and 9, it can be formed in a state of being bent by aluminum die casting. In that case, it is also possible to use a fixed scroll relationship formed of a metal member such as aluminum die casting and a revolving scroll formed of a synthetic resin.
[0067]
  FIG.Comparative exampleIt is principal part sectional drawing which shows the schematic structure regarding to.
  The orbiting scroll 12B, the fixed scroll 11B, and the housing 13B are made of aluminum. The wrap 12a of the orbiting scroll 12B has a cap 28 made of synthetic resin, and the lap 11a of the fixed scroll 11B has a synthetic resin cap 27. Further, a cap 29 made of synthetic resin is covered on the pressing portion 13e extended from the fixed scroll housing 13A.
[0068]
  The sliding surface 29a of the cap 29 is in sliding contact with the sliding surface 12e of the orbiting scroll 12B with a pressing force.
  Further, the sliding surface 27a of the cap 27 is in sliding contact with the sliding surface 12c of the orbiting scroll 12B with a pressing force.
  Further, the sliding surface 28a of the cap 28 is in sliding contact with the sliding surface 11c of the fixed scroll 11B with a pressing force.
[0069]
  Therefore, the fluid suction chamber 13Bb and the outside are kept airtight by the cap 29, and the lap space formed by the wrapping of the orbiting scroll and the fixed scroll is kept airtight by the caps 27 and 28.
[0070]
  The wall surface of the fixed scroll wrap 11a and the wall surface of the orbiting scroll wrap 12a are brought into contact with each other via caps 27 and 28, and direct contact is prevented, thereby causing a fretting phenomenon on the wrap wall surface and reducing durability. I will not let you.
[0071]
  BookComparative exampleIs a part that is continuously provided from the scroll body in the vicinity of a place for preventing leakage of fluid between the outside and inside or between one and the other, in which the two members of the scroll mechanism are in airtight sliding contact, , Which means a scroll wrap, a sliding contact part that prevents dust from entering from the outside, etc. Since a part of the scroll body is covered with an elastic member, the elastic member is peeled off from this part and a new elastic member is attached The elastic member can be easily replaced by the operation of doing, and the frictional dust of the elastic member is not accumulated inside the elastic member, so that troublesome cleaning work is unnecessary.
[0072]
  Further, the elastic member is configured so that the lap walls facing each other cover the wrap wall to an area where direct contact can be prevented, so that the direct contact of the wall surfaces of the laps facing each other by the elastic member is prevented. Therefore, the fretting phenomenon does not occur on the wall surface of the wrap and the durability is not lowered.
[0073]
  In the above description, the orbiting scroll and the fixed scroll are both formed of a metal member and covered with a synthetic resin cap. However, in a simple shape as shown in FIGS. In this case, one of the scrolls may be formed of a metal member such as aluminum die casting, and the other scroll may be covered with a synthetic resin cap.
[0074]
  15 shows the caps 27, 28 and 29.Various examplesFIG.
  (A) is obtained by implanting a protrusion 27Aa having elasticity on the inner surface of 27A made of synthetic resin.
  (B) is obtained by implanting a protrusion 27Ba having elasticity on the inner side surface of 27B made of synthetic resin and a protrusion 27Bb on the outer sliding surface.
  (C) is one in which a recess 27Ca is provided on the inner side surface of 27C made of synthetic resin, and a protrusion 27Cb is provided on the outer sliding surface.
[0075]
  FIG. 15 (d) shows a case where a concave portion 27Da and a projection 27Db are provided on the inner side surface of 27D made of a synthetic resin and a wrapping wall surface having a curved surface 27Dc. is there.
  (E) arrange | positions the processus | protrusion 27Ea which has a stretching property in the inner surface of 27E formed with the synthetic resin, and coat | covers the wrap wall surface with the curved surface 27Ec in a wavy shape.
  In (f), a protrusion 27Fa having elasticity on the inner side surface of 27F formed of a synthetic resin and a protrusion 27Fb having elasticity on the outer sliding surface are provided, and a curved surface 27Fc is formed in a wavy shape on the wrap wall surface. And coated.
[0076]
【The invention's effect】
  As described above, according to the first aspect of the present invention, since the scroll mechanism of the scroll fluid machine having at least a sliding surface and driven by the driving source is formed of synthetic resin, driving with a small output is performed. An economical and compact scroll fluid machine that can be driven by a source can be provided.
[0077]
  further, Claims1In the invention described in (1), one of the sliding surfaces is formed integrally with the scroll mechanism and has an elastic structure that applies a pressing force to the other of the sliding surfaces, so the number of parts is reduced. In addition, in order to cope with a decrease in airtightness due to wear of the sliding surface, the entire scroll mechanism may be replaced, and the tip seal fitted in the groove on the upper surface of the wrap is replaced as in the conventional case. No complicated operation is required.
[0078]
  further, Claims1In the invention described in the above, the elastic structure is formed by a folded solid body extending at the upper end of the wrap, so that this adjustment amount is the amount of vertical expansion and contraction of the tip seal fitted into the groove on the conventional wrap upper portion. It can be set larger, and the dimension between the boundary surfaces located above and below the sealed space for compressing fluid can be set rougher than before.
[0079]
  Claims2In the invention described in the above, the fixed scroll is formed of a synthetic resin, and an elastic structure that is slidably contacted by applying a pressing force to the sliding surface of the scroll mechanism is integrally formed with the fixed scroll, so that the number of parts is reduced. In addition, in order to cope with a decrease in airtightness due to wear of the sliding surface of the elastic structure, the entire fixed scroll may be replaced, and the tip seal fitted in the groove on the upper surface of the wrap is replaced as in the conventional case. The troublesome operation to do is not necessary.
[0080]
  Claims3In the invention described in the above, the other sliding surface that is in sliding contact with the elastic structure has a sliding surface that is harder than the elastic structure, so the elastic structure wears faster than the other, and both wear simultaneously. Therefore, the operation can be continued by replacing one scroll mechanism, which is economical.
[0081]
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[0082]
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[Brief description of the drawings]
FIG. 1 is a cross-sectional view of an essential part showing a schematic configuration according to an embodiment of the first invention.
FIG. 2 is a schematic cross-sectional view of a scroll fluid machine applied to the present invention.
3 is a cross-sectional view taken along a line AA in FIG.
FIG. 4 is a view of a fixed scroll wrap having a slidable contact portion as viewed from above.
FIG. 5 is a diagram showing a shape of a wrap before being folded.
FIG. 6 is a schematic structural diagram showing a second embodiment of a sliding contact portion.
FIG. 7 is a schematic structural diagram showing a third embodiment of a sliding contact portion.
FIG. 8 is a schematic structural diagram showing a fourth embodiment of a sliding contact portion.
FIG. 9 is a schematic structural diagram showing a fifth embodiment of a sliding contact portion.
FIG. 10 is a schematic structural diagram showing a sixth embodiment of a sliding contact portion.
FIG. 11 is a schematic structural diagram showing a seventh embodiment of the sliding contact portion.
FIG. 12 is a schematic structural diagram showing an eighth embodiment of a sliding contact portion.
FIG. 13 is a schematic structural diagram showing a ninth embodiment of a sliding contact portion.
FIG. 14Comparative exampleIt is principal part sectional drawing which shows the schematic structure regarding to.
FIG. 15: CapVarious examplesFIG.
[Explanation of symbols]
    1 Scroll fluid machinery
  10 Pink rank mechanism (rotation prevention mechanism)
  11 Fixed scroll
  12 Orbiting scroll
  13 Fixed scroll housing
  14 Standing wall
  17 Crank plate
  21, 22 Crank pin
  23, 24 O-ring
  34, 35, 36 Sliding part

Claims (3)

In a scroll fluid machine in which fluid is hermetically sealed by a sliding surface that slides relatively, and compressed, expanded, or pumped,
A scroll mechanism having at least the sliding surface and driven by a driving source is formed of synthetic resin, and one of the sliding surfaces is formed integrally with the scroll mechanism and the other of the sliding surfaces. A scroll fluid machine characterized by having an elastic structure that applies a pressing force to the lap, and the elastic structure is formed by a folded solid body extending to the upper end of the wrap . 2. The scroll according to claim 1 , wherein the fixed scroll is formed of a synthetic resin, and an elastic structure is formed integrally with the fixed scroll so as to be in sliding contact with a sliding surface of the scroll mechanism. Fluid machinery. 3. The scroll fluid machine according to claim 1 , wherein an opposing sliding surface in sliding contact with the elastic structure has a sliding surface harder than the elastic structure .

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