CN101027486A - Sliding member and fluid machine - Google Patents

Abstract

A lubrication part (70) serving as a bearing metal is provided in a scroll compressor (10) at a sliding part between a cylindrical part (26) of a slide bush (25) and an extension (53) of a movable scroll (50). The inner periphery of the lubrication part (70) is formed so that its iron substrate is given a surface roughness Ra of 3.7 [mu]m and a resin layer containing FEP and PTFE is then provided on the roughened substrate surface.

Description

Friction means and fluid machinery

Technical field

[0001] the present invention relates to a kind of friction means and fluid machinery compressor, particularly on the surface of metallic body material, comprise the friction means of the resin layer that contains fluorine and used its fluid machinery.

Background technique

[0002] in the most machinery that is used at present, is used friction means such as bearing, intermeshed gear.Such friction means need have necessary mechanical strength, need have frictional property or abrasion resistance on the surface simultaneously.Though the method that provides oiling agent to satisfy frictional property and abrasion resistance requirement by to friction portion is arranged, according to the position of using friction means, also having provides oiling agent unsuitable situation.In addition, under many circumstances, provide oiling agent to cause the rising of cost.Therefore, also develop many surfaces that under the state that does not make with lubricator, make and had the technology of frictional property or abrasion resistance.For example, can enumerate the technology that on the surface of friction means, forms the frictional property film.

[0003] at this, because friction means need have mechanical strength, so under many circumstances, the body material of friction means is a metal.Because frictional behaviour is very good, so under many circumstances, with molybdenum disulfide (MoS ₂), polymeric compound such as solid lubricant such as graphite or fluororesin is as the frictional property film.But, because described solid lubricant and polymeric compound are (resin) ungood with close property metal, so people are carrying out various researchs, to improve this close property.

[0004] people as what the way that improves close property was usually studied are, substrate material surface is processed into coarse shape, solid lubricant or resin are coated in the method (for example, with reference to patent documentation 1 and patent documentation 2) on this rough surface again.Described method is fine recess and solid lubricant or the resin engagement that makes in the substrate material surface, thereby the raising close property.

Patent documentation 1: Japanese publication communique spy opens flat 5-180231 communique

Patent documentation 2: Japanese publication communique spy opens the 2000-145804 communique

[0005] yet, disclosed technology in patent documentation 1 must can not adopt this technology to the frictional property parts that do not carry out this sclerosis with the sclerosis of the surface layer of metallic matrix.

[0006] disclosed Bai Feier (Birfield) formula constant velocity joint in patent documentation 2 is by shot blast substrate material surface to be processed, and makes the surface roughness of representing according to center line average roughness Ra become 10 to 30 μ m's.Therefore, the surface has only simple shape promptly concavo-convex greatly, and the effect of this surface and solid lubricant or resin engagement is very little.Therefore, close property does not improve, and particularly under the situation of having coated resin, resin can be peeled off in operation process, thereby friction factor raises significantly.This is a problem.Even after substrate material surface being processed into the surface roughness of representing according to center line average roughness Ra by shot blast and being the shape of 10 to 30 μ m, carry out chemical surface treatment (chemical conversion treatment), can not address this problem.

Summary of the invention

[0007] the present invention, described problem researchs and develops out in order to solve just.Its purpose is: provide and improved the frictional property film that contains fluororesin friction means and the fluid machinery to the close property of substrate material surface.

[0008] in order to reach above-mentioned purpose, the present invention is made as friction means and comprises the resin layer that contains fluororesin on the metallic substrate material surface.

[0009] particularly, first invention is an object with the friction means that comprises the resin layer that contains fluororesin on the surface of metallic body material.Described substrate material surface is handled arithmetic mean height Ra with profilogram greater than 0.5 μ m and less than the surface roughness of 10 μ m by surface roughening.

[0010] in this first invention, substrate material surface and resin laminating get tightly, the anxiety that does not almost have resin layer to peel off from body material.

[0011] second invention is in described first invention, and arithmetic mean height Ra with profilogram is handled greater than 0.75 μ m and less than the surface roughness of 10 μ m in the surface of described body material by surface roughening.

[0012] in this second invention, substrate material surface and resin laminating get very tight, can prevent positively that resin layer from peeling off from body material.

[0013] the 3rd invention is that it is chemical surface treatment that described surface roughening is handled in described first or second invention.

[0014] in the 3rd invention, can mode very high with precision and that reproducibility (reproducibility) is very high carry out the surface roughening processing.

[0015] the 4th invention is that described resin layer contains polyamide-imide resin in any invention in described first to the 3rd invention.

[0016] in the 4th invention, can make not frangibility of resin layer, can make resin layer and metal matrix material paste tightlyer.

[0017] the 5th invention is that the surface layer of described body material is handled without overvulcanization in the arbitrary invention in described first to the 4th invention.

[0018] in the 5th invention, do not need specially to carry out cure process, cost lowers.

[0019] the 6th invention is an object with the fluid machinery that comprises friction means.Described friction means comprises the resin layer that contains fluororesin at least a portion on the surface of metallic body material.Arithmetic mean height Ra with profilogram is handled greater than 0.5 μ m and less than the surface roughness of 10 μ m in the surface of the body material of described resin layer by surface roughening.

[0020] in the 6th invention, in the friction means in fluid machinery, substrate material surface and resin laminating get tightly, the anxiety that does not almost have resin layer to peel off from body material.

[0021] the 7th invention is in described the 6th invention, and arithmetic mean height Ra with profilogram is handled greater than 0.75 μ m and less than the surface roughness of 10 μ m in the surface of the body material of described resin layer by surface roughening.

[0022] in the 7th invention, substrate material surface and resin laminating get very tight, can prevent positively that resin layer from peeling off from body material.

[0023] the 8th invention is that it is chemical surface treatment that described surface roughening is handled in the described the 6th or the 7th invention.

[0024] in the 8th invention, can mode very high with precision and that reproducibility is very high carry out the surface roughening processing.

[0025] the 9th invention is that described resin layer contains polyamide-imide resin in any invention in described the 6th to the 8th invention.

[0026] in the 9th invention, can make not frangibility of resin layer, can make resin layer and metal matrix material paste tightlyer.

[0027] the tenth invention is that described friction means is present in the refrigeration agent in the arbitrary invention in described the 6th to the 9th invention.

[0028] in the tenth invention, lubricity improves in refrigeration agent especially.

[0029] the 11 invention is that described refrigeration agent comprises the material that contains fluorine in described the tenth invention.

[0030] in the 11 invention, the cooling effectiveness of compressor and lubricity are very good.

[0031] the 12 invention is that oiling agent is below 5% to the composite rate of described refrigeration agent in the described the tenth or the 11 invention.

[0032] in the 12 invention, because oiling agent is very low to the composite rate of refrigeration agent, so cooling effectiveness improves.

[0033] the 13 invention is in the described the tenth or the 11 invention, and unmixed basically in described refrigeration agent have an oiling agent.

[0034] in the 13 invention, cooling effectiveness improves greatly.

[0035] the 14 invention is that fluid machinery comprises vortex mechanism (40) in any invention in described the 6th to the 13 invention, and this vortex mechanism (40) has intermeshing a pair of scroll portion (50,60).In a pair of scroll portion (50,60) at least one constitutes friction means.Described is the scroll portion (50,60) of friction means, comprises described resin layer at least a portion of metallic substrate material surface.

[0036] in the 14 invention, the resin laminating that is formed at least one scroll portion in the scroll portion (50,60) gets tightly the anxiety that does not almost have resin layer to peel off from body material.

[0037] the 15 invention is that described resin layer is formed directly in the bearing portion (53) of movable scroll portion (50) in described the 14 invention.

[0038] in this 15 invention, because in the bearing portion (53) of movable scroll portion (50), directly formed resin layer, so movably the bearing portion (53) and the resin laminating of scroll portion (50) get tightly, and the simplification that can seek to process.

[0039] the 16 invention is that described resin layer is formed directly on the whole movable scroll portion (50) in described the 14 invention.

[0040] in the 16 invention, because on whole movable scroll portion (50), formed resin layer, so the simplification that can seek to process.

[0041] the 17 invention is that described resin layer is formed directly on the movable side clinch (52) of movable scroll portion (50) in described the 14 invention.

[0042] in the 17 invention, because on the movable side clinch (52) of movable scroll portion (50), directly formed resin layer, so the movable side clinch (52) of movable scroll portion (50) surface and resin laminating get tightly, and lower in the gap between this movable side clinch (52) and the fixed scroll portion (60).

[0043] the 18 invention is in described the 14 invention, and described resin layer is formed directly on whole and movable scroll portion (50) face in opposite directions in the fixed scroll portion (60).

[0044] in the 18 invention, because directly formed resin layer on whole and movable scroll portion (50) face in opposite directions in fixed scroll portion (60), so fixed scroll portion (60) and resin laminating get tightly, and be somebody's turn to do and face and the movably attenuating of the gap between the scroll portion (50) in opposite directions of movable scroll portion (50).

[0045] the 19 invention is that fluid machinery comprises vortex mechanism (40) in described the 6th invention, and this vortex mechanism (40) has intermeshing a pair of scroll portion (50,60).The thrust-bearing (80) of the movable scroll portion (50) in the described a pair of scroll portion (50,60) constitutes friction means.Described is the thrust-bearing (80) of friction means, is going up the direct described resin layer that forms with the frictional contact surface (81) of movable scroll portion (50).

[0046] in the 19 invention, because directly formed resin layer in thrust-bearing (80) and the frictional contact surfaces movable scroll portion (50) (81), so thrust-bearing (80) and resin laminating get tightly.

The effect of-invention-

[0047] according to first invention, the close property of metallic body material and resin layer improves, and frictional property is very good.

[0048] according to second invention, the close property of metallic body material and resin layer positively improves, and frictional property is very good.

[0049], can mode very high with precision and that reproducibility is very high carries out the surface roughening of metallic body material according to the 3rd invention.

[0050] according to the 4th invention, can make resin layer very hard, and this layer further improved the close property of metallic body material.

[0051] according to the 5th invention, can reduce the cost.

[0052] according to the 6th invention, in the friction means in fluid machinery, the close property of substrate material surface and resin layer improves, and frictional property is very good.

[0053] according to the 7th invention, the substrate material surface in the friction means in the fluid machinery and the close property of resin layer positively improve, and frictional property is very good.

[0054] according to the 8th invention, can be very high with precision and mode convection cell machinery that reproducibility is very high in the metallic body material of friction means carry out surface roughening.

[0055], can make the resin layer on the friction means in the fluid machinery very hard, and this layer further improved the close property of metallic body material according to the 9th invention.

[0056] according to the tenth invention, cooling effectiveness and lubricity all improve.

[0057] according to the 11 invention, the compatibility of lubricity and friction means and refrigeration agent (compatibility) improves.

[0058] according to the 12 invention, cooling effectiveness improves under the state that keeps lubricity.

[0059] according to the 13 invention, cooling effectiveness improves under the state that keeps lubricity.

[0060] according to the 14 invention, the close property that is formed on the resin layer at least one scroll portion in the scroll portion (50,60) improves, and frictional property is very good.

[0061] according to the 15 invention, the bearing portion of movable scroll portion (50) and the close property of resin layer improve, and the simplification that can seek to process.

[0062] according to the 16 invention, do not need only the particular in the movable scroll portion (50) to be formed the processing of resin layer, the simplification that can seek to process.

[0063] according to the 17 invention, movable side clinch (52) surface of movable scroll portion (50) and the close property of resin layer improve, and the attenuating of the gap between this movable side clinch (52) and the fixed scroll portion (60), can guarantee good sealing property.

[0064] according to the 18 invention, the close property of fixed scroll portion (60) and resin layer improves, and face and the movably attenuating of the gap between the scroll portion (50) in opposite directions of the described movable scroll portion (50) in the fixed scroll portion (60) can be guaranteed good sealing property.

[0065] according to the 19 invention, the close property with frictional contact surface movable scroll portion (81) and resin layer in the thrust-bearing (80) improves, and the frictional property of the frictional contact surface of movable scroll portion (50) and thrust-bearing (80) improves.

Description of drawings

[0066] Fig. 1 is the sectional drawing of the related scroll compressor of first embodiment.

Fig. 2 is the schematic representation of explanation limit contact pressure test.

Fig. 3 is the surface roughness Ra of expression body material and the figure of the relation between the limit PV.

Fig. 4 is the result's of the friction test in the expression refrigeration agent figure.

Fig. 5 is the result's of the airborne limit contact pressure test of expression figure.

Fig. 6 is the result's of the airborne wear extent test of expression figure.

Fig. 7 is the sectional drawing of the related scroll compressor of second embodiment.

Fig. 8 is the sectional drawing of the related swing compressor of the 3rd embodiment.

Fig. 9 is the transverse cross-sectional view of the cylinder inner structure of the related swing compressor of expression the 3rd embodiment.

Figure 10 is the sectional drawing of the related swing compressor of the 4th embodiment.

Figure 11 is the sectional drawing of the related rotary compressor of the 5th embodiment.

Figure 12 is the transverse cross-sectional view of the cylinder inner structure of the related rotary compressor of expression the 5th embodiment.

Symbol description

[0067] the movable scroll portion of 50-; The movable side clinch of 52-; The 53-jut; 60-fixed scroll portion; The 80-thrust-bearing; The upper surface of 81-thrust-bearing.

Embodiment

[0068] below,, describes embodiments of the invention in detail with reference to accompanying drawing.

[0069] (first embodiment)

The scroll compressor of present embodiment (10) is mounted in the refrigerant circuit of refrigeration plant, and being used for compressed fluid is the fluid machinery of gas refrigerant.

[0070] (overall structure of scroll compressor)

As shown in Figure 1, described scroll compressor (10) constitutes so-called totally-enclosed shape.This scroll compressor (10) comprises forming the housing (11) of longitudinal length than long and cylindrical circular closed container shape.Inside in described housing (11), being disposed with lower bearing parts (30), motor (35) and vortex mechanism from the lower direction top is compressing mechanism (40).In addition, in housing (11) inside, be provided with the live axle (20) that extends along the vertical direction.

[0071] described housing (11) inside is divided into top and the bottom by the fixed scroll portion (60) of compressing mechanism (40).The space of fixed scroll portion (60) top in described housing (11) inside constitutes first Room (12); The space of fixed scroll portion (60) below constitutes second Room (13).

[0072], is provided with suction pipe (14) at the main part of described housing (11).This suction pipe (14), second Room (13) opening in housing (11).Upper end portion in described housing (11) is provided with spraying pipe (15).This spraying pipe (15), first Room (12) opening in housing (11).

[0073] described live axle (20) comprises main shaft part (21), axle neck portion (22) and eccentric part (23).Described axle neck portion (22) is formed on the upper end of main shaft part (21), is diameter than big discoideus of main shaft part (21).Described eccentric part (23) is arranged on the upper surface of neck portion (22) in the mode of projection.This eccentric part (23) is diameter than little cylindric of main shaft part (21), the axle center off-centre of the relative main shaft part in axle center (21) of this eccentric part (23).

[0074] main shaft part (21) of described live axle (20) has run through the framework component (41) of compressing mechanism (40).This main shaft part (21) is supported on the framework component (41) by roller bearing (42).The axle neck portion (22) and the eccentric part (23) of live axle (20) are positioned at the part of the ratio framework component (41) of second Room (13) by the top.

[0075] on described live axle (20), is provided with slide bushing (25).This slide bushing (25) comprises cylindrical part (26) and counterweight (27), is arranged in the neck portion (22).The eccentric part (23) of live axle (20) is inserted in the cylindrical part (26) of described slide bushing (25).

[0076] described lower bearing parts (30) are positioned at second Room (13) of housing (11).These lower bearing parts (30) are fixed on the framework component (41) by bolt (32).Lower bearing parts (30) are by the main shaft part (21) of ball bearing (31) supporting driving shaft (20).

[0077] on described lower bearing parts (30), is provided with oil feed pump (33).This oil feed pump (33) is bonded on the lower end of live axle (20).Described oil feed pump (33) is driven by live axle (20), sucks the refrigerator oil that accumulates in housing (11) bottom.By the refrigerator oil that oil feed pump (33) sucts, flow through the circulation flow path that is formed in the live axle (20), be provided for compressing mechanism (40) etc.

[0078] described motor (35) comprises stator (36) and rotor (37).Described stator (36) is fixed on the framework component (41) with lower bearing parts (30) by bolt (32).Described rotor (37) is fixed on the main shaft part (21) of live axle (20).

[0079], is provided with terminal (16) in order to power supply at the main part of described housing (11).This terminal (16) is covered by terminal box (17).Motor (35) is provided power by terminal (16).

[0080] (structure of compressing mechanism)

Described compressing mechanism (40) comprises fixed scroll portion (60) and movable scroll portion (50), and comprises framework component (41) and Oudan ring (Oldham ring) (43).This compressing mechanism (40) for example adopts so-called asymmetric eddy's structure.

[0081] described movable scroll portion (50) comprises movable side plat part (51), movable side clinch (52) and jut (53).Described movable side plat part (51) forms bigger discoideus of thickness.Described jut (53) is to form as one with movable side plat part (51) from the outstanding mode of the lower surface (back side) of movable side plat part (51).Described jut (53) roughly is positioned at the central authorities of movable side plat part (51).The cylindrical part (26) of slide bushing (25) is inserted in this jut (53), and this jut (53) constitutes bearing portion.In other words, the eccentric part (23) of live axle (20) is inserted in the described movable scroll portion (50) across slide bushing (25).

[0082] described movable side clinch (52) is arranged on the upper surface side (face side) of movable side plat part (51) in the mode of standing, and forms as one with movable side plat part (51).Described movable side clinch (52) forms the scroll-type wall shape with certain height.

[0083] described movable scroll portion (50) is arranged on the framework component (41) across Oudan ring (43) and thrust-bearing (80).In described Oudan ring (43), be formed with two pairs of pins (key).The a pair of pin of this Oudan ring (43) engages with the movable side plat part (51) of movable scroll portion (50), and remaining a pair of pin engages with framework component (41).This Oudan ring (43) limits the spinning motion of movable scroll portion (50).In other words, described Oudan ring (43) is rubbing mobile with movable scroll portion (50) and framework component (41).

[0084] described thrust-bearing (80) is arranged in the recess of framework component (41).The upper surface (81) of described thrust-bearing (80) is the frictional contact surface that the lower surface of the movable side plat part (51) of movable scroll portion (50) rubs.In other words, described movable scroll portion (50) under the state of upper surface (81) friction of the lower surface of the movable side plat part (51) that makes this movable scroll portion (50) and thrust-bearing (80), is carried out revolution motion.

[0085] as shown in Figure 1, described fixed scroll portion (60) comprises fixed side plat part (61), fixed side clinch (63) and edge part (62).Described fixed side plat part (61) forms bigger discoideus of thickness.The diameter of this fixed side plat part (61) is substantially equal to the internal diameter of housing (11).Described edge part (62) forms the wall shape that extends from the edge section of fixed side plat part (61) downwards.Described fixed scroll portion (60) is fixed on the framework component (41) by bolt (44), is in the lower end and framework component (41) state of contact of edge part (62).The edge part (62) of described fixed scroll portion (60) is adjacent to housing (11), and this fixed scroll portion (60) will be divided into first Room (12) and second Room (13) in the housing (11).

[0086] described fixed side clinch (63) is arranged on the lower face side (face side) of fixed side plat part (61) in the mode of standing, and forms as one with fixed side plat part (61).Described fixed side clinch (63) forms the scroll-type wall shape with certain height, nearly length of changeing three circles.

[0087] two side surfaces of described fixed side clinch (63) are clinch inner surface (64) and clinch outer surface (65), are that clinch outer surface (54) and clinch inner surface (55) are rubbing mobile by two side surfaces of movable side clinch (52).The front-end face of movable side clinch (52), with the lower surface (front) of described fixed side plat part (61), promptly fixed side clinch (63) between cog bottom surface (66) is in addition rubbing mobile; The front-end face of fixed side clinch (63), by the upper surface (front) of movable side plat part (51), promptly movable side clinch (52) between cog bottom surface (56) is in addition rubbing mobile.Near the position that fixed side clinch (63) in fixed side plat part (61) begins to roll up, be formed with ejiction opening (67).This ejiction opening (67) has run through fixed side plat part (61), to first Room (12) opening.

[0088] as mentioned above, the scroll compressor of present embodiment (10) is installed in the refrigerant circuit of refrigeration plant.Refrigeration agent circulates in this refrigerant circuit, carries out the steam compression type refrigerating circulation.At this moment, scroll compressor (10) sucks the low-pressure refrigerant gas of from evaporator drier and compresses, and makes the high-pressure gas refrigerant after the compression flow to condenser again.

[0089] remark additionally, described refrigeration agent comprises the material that contains fluorine, and oiling agent is below 5% to the composite rate of described refrigeration agent, or unmixed basically in described refrigeration agent oiling agent arranged.

[0090] under the situation that makes described scroll compressor (10) running, jut (53) friction of the cylindrical part (26) of slide bushing (25) and movable scroll portion (50).In the present embodiment, be provided with the promptly lubricated portion (70) of bearing metal at this friction portion.It is cylindrical to lubricate portion (70), and constituting with iron is body material, and is provided with the friction means of lubricant layer (resin layer) on the surface of this body material (inner surface side).Be provided with lubricated portion (70) internal surface of lubricant layer, with the outer surface friction of the cylindrical part (26) of slide bushing (25).

[0091] surface roughness Ra of the substrate material surface of this lubricated portion (70) is treated as 3.7 μ m by surface.Then, on substrate material surface, coat make polyamide-imide resin (below, be called PAI), teflon (below, be called PTFE) and the tetrafluoraoethylene-hexafluoropropylene copolymer resin (below, be called FEP) oiling agent that mixes, forming the resin layer that thickness is about 100 μ m is lubricant layer.At this, surface roughness Ra is meant JIS (JIS) B0601-2001 arithmetic mean height defined, profilogram Ra.In the following description, when being expressed as surface roughness Ra, also refer to the arithmetic mean height Ra of JIS defined.

[0092] have the lubricated portion (70) of such structure by setting, the cylindrical part (26) of slide bushing (25) and lubricated portion (70) are present in the refrigeration agent and rub, and also can rub extremely for a long time with very low friction factor.

[0093] (evaluation of friction portion)

Below, the research that lubricated portion (70) is carried out is described.

[0094] fluorine resin very low with friction factor metal, the frictional property of fluorine resin is very good.But as described in the background technique hurdle, the close property with the metallic body material of fluorine resin is poor, is easy to peel off from the metallic body material.So this case inventor has intently inquired into following thing, that is: which type of degree is the surface roughness with body material be made as, and fluorine resin just can improve the close property of body material.

[0095] by implementing the test of limit contact pressure, studies with as shown in Figure 2 ring and disc test sheet.The test of limit contact pressure, it is the test that the close property of oiling agent and body material is estimated, make the ring that constitutes by SUJ2 (in JIS G4805-1990, regulation being arranged) with certain speed rotation, and the running shaft direction of evaluation test sheet (disk) along this ring be pressed on this ring, estimate again.In test, measure moment of torsion that ring produced on one side, on one side to increase the load that presses interimly in every mode that increases any after spending the regular hour.

[0096] then, the load when moment of torsion is sharply risen is scaled contact pressure, again with the product of this contact pressure and rotational speed as limit PV (limit contact pressure velocity product), and as the evaluation coefficient of close property.In other words, because under the situation that the oiling agent of test film has peeled off from body material, the friction factor between ring and the disk sharply increases, moment of torsion sharply rises, so can estimate close property according to limit PV.Limit PV is big more, and close property is good more.Remark additionally, test this time is in atmosphere and lubricant oil is carried out under the condition between ring and the disk.

[0097] test film is by chemical surface treatment iron-based body material surface to be implemented surface roughening to handle, and also forms the lubricant layer that contains fluororesin then and form on this surface.By changing the treatment conditions of chemical surface treatment, adjusted the surface roughness Ra of body material.For chemical surface treatment, used manganese phosphate at this.With ratio of components is that the resin compound of PAI/FEP/PTFE=70/24/6 has formed lubricant layer.If the thickness of lubricant layer is about 100 μ m.Remark additionally, after coating resin compound, cure, then the surface is ground, formed lubricant layer like this.

[0098] Fig. 3 is the surface roughness Ra of expression body material and the plotted curve of the relation between the limit PV.Remark additionally,, be meant the arithmetic mean height Ra of profilogram substrate material surface, JIS B0601-2001 defined at the body material Ra shown in Fig. 3.

[0099] as seen, less than 0.5 μ m, limit PV is just less than 0.4MPam/s as if Ra, and if Ra surpasses 0.5 μ m, limit PV has had the close property that is sufficient to as general friction means just greater than 0.4MPam/s by this plotted curve.Limit PV is preferably 1MPam/s above (Ra is more than the 0.75 μ m), and this is because in such event, even just environmental change also can keep enough close property.Remark additionally, under the situation of the purposes that is used for close property that need be higher, limit PV is preferably 1.0MPam/s above (Ra is more than the 0.75 μ m), and suitable is 1.5MPam/s above (Ra is more than the 0.85 μ m).

[0100] on the other hand, under the excessive situation of surface roughness Ra, because the maximum height Rz in the surface roughness is also very big, so the part of body material can be given prominence to from the surface of lubricant layer.In addition, if surface roughness Ra is increased, just need carry out chemical surface treatment for a long time, cost can increase, and the concavo-convex easy collapse of the substrate material surface by chemical surface treatment formation.On those grounds, surface roughness Ra is preferably less than 10 μ m.Because can form, so be more preferably below the 5 μ m with low cost.

[0101] then, following two kinds of samples have been carried out the evaluation test of frictional behaviour, these two kinds of samples are: make the surface roughness Ra of iron-based body material become 3.7 μ m by chemical surface treatment, the lubricant layer that will have above-mentioned ratio of components again is coated on the substrate material surface, carried out sample B that cure and grind, present embodiment then and for more formed Sample A.This Sample A is to form porous sintered bronze (surface roughness Ra is more than the 30 μ m) on the iron plate, fluororesin is immersed in this porous sintered bronze and forms.Remark additionally, control sample A is to be used for the existing friction means of air conditioning with scroll compressor.

[0102] Fig. 5 is illustrated in the result of the limit contact pressure test of carrying out under the condition of in the air and not using lubricant oil.Control sample A has caused when contact pressure is about 5.5MPa and has bitten (seizing), even and the upper limit that sample B reaches testing apparatus in contact pressure when being 7MPa do not cause yet and bite.

[0103] Fig. 6 is illustrated in the result of the wear extent test of carrying out under the condition of in the air and not using lubricant oil.Test conditions is that contact pressure is that 2.8MPa, friction velocity are 1m/s and carry out 1 hour friction.The wear extent of control sample A is about 45 μ m, and the wear extent of sample B is considerably less, is 10 μ m.This shows that sample B is very good.

[0104] Fig. 4 is illustrated in the result of the friction test of carrying out in the refrigeration agent.In general, in air conditioning with in the compressor, use the refrigeration agent that mixes with 65: 35 ratio (HFC (and hydrofluorocarbon: refrigeration agent hydrofluoroalkane)) and lubricant oil, to suppress the wearing and tearing of friction portion.In this test, the composite rate (concentration) that changes lubricant oil has obtained data.The HFC refrigeration agent comprises the material that contains fluorine.In friction test shown in Figure 4, it is that 3MPa, friction velocity are the wear extent when having carried out two hours friction under the state of 2m/s that the longitudinal axis is illustrated in contact pressure.Transverse axis represents to be blended in the ratio of the lubricant oil in the refrigeration agent.

[0105] control sample A is the existing parts that are used for friction portion.Promptly under 35% the situation, the wear extent of control sample A has 13 μ m at common concentration of lubricating oil, is that wear extent is increased to 24 μ m under 10% the situation establishing concentration of lubricating oil.On the other hand, be that the wear extent of sample B is 2 μ m under 10% the situation at concentration of lubricating oil, even be 0% at concentration of lubricating oil, refrigeration agent is that the wear extent of sample B is also considerably less, is 4 μ m under 100% the situation in other words.The sample B of present embodiment is 100% o'clock a wear extent at refrigeration agent, is less than the wear extent of control sample A when concentration of lubricating oil (35%) usually.

[0106] can obviously find out by The above results, even be that the sample B of present embodiment is wearing and tearing hardly also, thereby do not need to make lubricant oil to be blended in the refrigeration agent, can increase substantially cooling effectiveness under 0% the situation at concentration of lubricating oil.Because fluorine resin is present on the surface of friction means, thus friction means and refrigeration agent compatible fine that comprises the material that contains fluorine, the frictional behaviour raising.Can be estimated as friction part branch and be in when the startup of compressor and during transition and do not have state refrigeration agent, bone dry, even under these circumstances, the sample B of present embodiment also plays the excellent friction performance.The excellent friction performance is that competence exertion comes out under the very high state of the close property of body material and fluoropolymer resin layer (lubricant layer) like this.In other words, because in sample B, the surface roughness Ra of establishing substrate material surface is the suitable interior value of scope, so the close property of body material and fluoropolymer resin layer is very good, therefore can bring into play very excellent friction performance.

[0107] below, the composition of the resin layer that comprises fluororesin is described.

[0108] preferably such, the main component that comprises the resin layer of fluororesin, by mass percent more than 1 5% and mass percent below 35% fluororesin and mass percent more than 65% and the polyamide-imide resin of mass percent below 85% constitute.Preferably such, the fluororesin in the described main component is made of FEP and PTFE.Preferably such, in described fluororesin, the ratio of FEP is higher than the ratio of PTFE.Particularly, FEP in the described fluororesin and the quality ratio of PTFE are preferably FEP: PTFE=7: 3 to 99: 1, suitable was if FEP has " 9 ", and just this has " 1 " to PTFE relatively.

[0109] under the situation that is mixed with polyamide-imide resin as mentioned above, can utilize the characteristic of good this polyamide-imide resin of impact resistance, can on the rubbing surface of structure member, form the very high and incrust resin film of impact resistance.Because polyamide-imide resin also has very high this characteristic of hardness, this resin film is harder and not easy to wear.

[0110] also can be such, except the main component that constitutes by fluororesin and polyamide-imide resin, in comprising the resin layer of fluororesin, also allocate pigment or other additives such as carbon that has as colorant.The adding quantity of such additive is made as the performance of the resin layer that comprises fluororesin and the close property of this resin layer and body material are not caused dysgenic degree.For example, the mass percent that needs to be made as fluororesin as the amount of the carbon of additive is below 3%, and suitable is to be made as mass percent below 1%, and more suitable is to be made as mass percent below 0.5%.

[0111] comprise the thickness of the resin layer of fluororesin, it is above and below the 120 μ m to be preferably 35 μ m.If thickness less than 35 μ m, just has the ungood anxiety of frictional behaviour; If thickness is greater than 120 μ m, manufacture cost is just very high.From frictional behaviour aspect and cost aspect, more suitable is, and to establish this layer thickness be that 50 μ m are above and below the 105 μ m.Remarking additionally, is average thickness at this said layer thickness, also can local have the thickness outside this scope.

[0112] in the present embodiment, in the promptly lubricated portion (70) of friction means, establish the size of the surface roughness Ra of body material for regulation, formation comprises the resin layer of fluororesin as lubricating layer on this surface again.Therefore, body material gets tightly with the resin laminating that comprises fluorine resin, and frictional behaviour is very good.Particularly in the refrigeration agent that comprises the material that contains fluorine, use and to lubricate under the situation of portion (70),, can the friction that friction factor is very low keep for a long time even without lubricant oil also wearing and tearing hardly.Because the friction means of present embodiment makes substrate material surface become the surface roughness Ra of regulation by carrying out chemical surface treatment, performance excellent friction performance is so can make this friction means in mode simple and that cost is very low.Because the friction means of present embodiment can produce according to so simple method, so the friction means that can produce according to this method is not only the friction means of friction portion of the jut (53) of the cylindrical part (26) that is used for slide bushing (25) and movable scroll portion (50), but friction means of various kind and purposes.

[0113]-first embodiment's first variation-

In this variation, go up at the jut (53) of movable scroll portion (50) and directly to form resin layer as oiling agent, replace among described first embodiment, constitute the way of lubricating portion (70) with miscellaneous part.

[0114] in other words, handle by the surface roughening that chemical surface treatment has been implemented to make substrate material surface roughness Ra become 1 μ m to the inner surface of the jut (53) of described movable scroll portion (50), having formed ratio of components on this surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0115] in this variation, be in the movable scroll portion (50) at friction means, on the jut (53) of this movable scroll portion (50), directly formed resin layer.Therefore, the attenuating of manufacturing procedure number can be sought, and the attenuating of number of components can be sought.Other structures, effect and effect are the same with first embodiment.

[0116]-first embodiment's second variation-

In this variation, on the lower surface of movable side plat part (51), form resin layer, replace way described first variation, that resin layer is set at the friction portion of the jut (53) of movable scroll portion (50).

[0117] in other words, the lower surface of the movable side plat part (51) in the movable scroll portion (50) of described scroll compressor (10) is with the upper surface friction of the upper surface (81) and the Oudan ring (43) of thrust-bearing (80).Therefore, in this variation, make the substrate material surface roughness Ra of movable side plat part (51) lower surface become 1 μ m by chemical surface treatment, having formed ratio of components again on this substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0118] in this variation, be in the movable scroll portion (50) at friction means, on the movable side plat part (51) of this movable scroll portion (50), directly formed resin layer.Therefore, can seek the attenuating of manufacturing procedure number.Other structures, effect and effect are the same with first embodiment.

[0119]-first embodiment's the 3rd variation-

In this variation, at friction means is that the movable side clinch (52) of movable scroll portion (50) is gone up and directly to be formed resin layer, replaces way described first variation, that resin layer is set on the inner surface of the jut (53) of movable scroll portion (50).

[0120] in other words, the side surface friction of the side surface of the movable side clinch (52) of the movable scroll portion (50) of described scroll compressor (10) and the fixed side clinch (63) of fixed scroll portion (60), between cog bottom surface (66) friction of the front-end face of movable side clinch (52) and the fixed side plat part (61) of fixed scroll portion (60).Therefore, in this variation, make the substrate material surface roughness Ra on movable side clinch (52) surface become 1 μ m by chemical surface treatment, having formed ratio of components again on this substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0121] in this variation, because on the movable side clinch (52) of movable scroll portion (50), directly formed resin layer, so the movable side clinch (52) of movable scroll portion (50) surface and resin laminating get tightly, and lower in the gap between the fixed side clinch (63) of this movable side clinch (52) and fixed scroll portion (60) and the between cog bottom surface (66) of fixed side plat part (61), can guarantee good sealing property.Other structures, effect and effect are the same with first embodiment.

[0122]-first embodiment's the 4th variation-

In this variation, be that whole movable scroll portion (50) goes up and directly to form resin layer at whole friction means, replace way described first variation, that resin layer is set on the inner surface of the jut (53) of movable scroll portion (50).

[0123] in other words, in the movable scroll portion (50) of described scroll compressor (10), on whole movable scroll portion (50), directly formed resin layer, with improve jut (53) inner surface described in first and second variation of described first embodiment and movable side plat part (51) lower surface, with the frictional property of the other side's parts, and improve in the movable scroll portion (50) described in described first embodiment's the 3rd variation frictional property and sealing with fixed scroll portion (60) face in opposite directions.

[0124] particularly, make the substrate material surface roughness Ra on the whole surface of described movable scroll portion (50) become 1 μ m by chemical surface treatment, having formed ratio of components again on this substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0125] in this variation, do not need the particular of movable scroll portion (50) is formed the processing of resin layer, and on whole movable scroll portion (50), directly formed resin layer.Therefore, can seek the attenuating of manufacturing procedure number.Other structures, effect and effect are the same with first embodiment.

[0126]-first embodiment's the 5th variation-

In this variation, on the whole of fixed scroll portion (60) and movable scroll portion (50) face in opposite directions, directly form resin layer, replace way described first variation, that resin layer is set on the inner surface of the movable jut (53) of scroll portion (50).

[0127] in other words, in the fixed scroll portion (60) of described scroll compressor (10) with movable scroll portion (50) face in opposite directions, be the between cog bottom surface (66) of the fixed side clinch (63) and the fixed side plat part (61) of fixed scroll portion (60), with the upper surface friction of the movable side clinch (52) and the movable side plat part (51) of movable scroll portion (50).Therefore, in this variation, make the substrate material surface roughness Ra of the between cog bottom surface of two side surfaces of fixed side clinch (63) of fixed scroll portion (60) and front-end face and fixed side plat part (61) become 1 μ m by chemical surface treatment, having formed ratio of components again on described substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0128] in this variation, because formed resin layer on whole and movable scroll portion (50) face in opposite directions in the fixed scroll portion (60), so fixed scroll portion (60) and resin laminating get tightly, and be somebody's turn to do and face and the movably attenuating of the gap between the scroll portion (50) in opposite directions of movable scroll portion (50), can guarantee good sealing property.Other structures, effect and effect are the same with first embodiment.

[0129] one first embodiment's the 6th variation-

In this variation, on the outer surface of the cylindrical part (26) of slide bushing (25), resin layer is set, replace way described first variation, that resin layer is set on the inner surface of the jut (53) of movable scroll portion (50).

[0130] in other words, the inner surface friction of the jut (53) of the outer surface of the cylindrical part (26) of the slide bushing (25) of described scroll compressor (10) and movable scroll portion (50).Therefore, in this variation, make the substrate material surface roughness Ra of outer surface of the cylindrical part (26) of slide bushing (25) become 1 μ m by chemical surface treatment, having formed ratio of components again on this substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0131] in this variation, because at friction means is in the slide bushing (25), on the outer surface of cylindrical part (26), directly formed resin layer, so can seek the attenuating of manufacturing procedure number, and it is the same with first embodiment's first variation, do not need to be provided with lubricated portion (70), thereby can seek the attenuating of number of components yet.Other structures, effect and effect are the same with first embodiment.

[0132]-first embodiment's the 7th variation-

In this variation, go up at the upper surface (81) of thrust-bearing (80) and directly to form resin layer, replace way described first variation, that resin layer is set on the inner surface of the movable jut (53) of scroll portion (50).

[0133] in other words, the upper surface (81) of the thrust-bearing (80) of described scroll compressor (10) is with the lower surface friction of the movable side plat part (51) of movable scroll portion (50).Therefore, in this variation, make the substrate material surface roughness Ra of the upper surface (81) of thrust-bearing (80) become 1 μ m by chemical surface treatment, having formed ratio of components again on this substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0134] in this variation, because on the upper surface (81) of thrust-bearing (80), directly formed resin layer, so the upper surface (81) and the resin laminating of thrust-bearing (80) get tightly, and can improve the frictional property of friction portion of movable side plat part (51) lower surface of the upper surface (81) of thrust-bearing (80) and movable scroll portion (50).Other structures, effect and effect are the same with first embodiment.

[0135]-first embodiment's the 8th variation-

In this variation, go up at Oudan ring (43) and directly to form resin layer, replace way described first variation, that resin layer is set on the inner surface of the movable jut (53) of scroll portion (50).

[0136] in other words, a pair of pin of the Oudan ring (43) of described scroll compressor (10) is with the lower surface friction of the movable side plat part (51) of movable scroll portion (50); The main body of Oudan ring (43) and another are to pin and framework component (41) friction.Therefore, in this variation, make the substrate material surface roughness Ra on Oudan ring (43) surface become 1 μ m by chemical surface treatment, having formed ratio of components again on described substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0137] in this variation, because on Oudan ring (43) surface, directly formed resin layer, so Oudan ring (43) and resin laminating get tightly, and a pair of pin that can improve Oudan ring (43) and the frictional property of the friction portion of movable side plat part (51) lower surface of movable scroll portion (50) and main body and another frictional property to the friction portion of pin and framework component (41) of Oudan ring (43).Other structures, effect and effect are the same with first embodiment.

[0138] (second embodiment)

Below, according to Fig. 7, describe the second embodiment of the present invention in detail.

[0139] in the scroll compressor (100) of present embodiment, the main shaft part (21) of live axle (20) is supported in the bottom main bearing portion (120) of the main bearing portion (110) of framework component (41) and lower bearing parts (119) by the promptly lubricated portion (111,121) of bearing metal, replace among described first embodiment, live axle (20) is supported on way on framework component (41) and the lower bearing parts (30) by roller bearing (42) and ball bearing (31).

[0140] described lubricated portion (111,121) forms cylindrical shape, constitutes friction means.Described lubricated portion (111,121), be that to make with iron by chemical surface treatment be that the substrate material surface roughness Ra of inner surface of parts of body material becomes 1 μ m, being provided with by ratio of components again on this substrate material surface is the resin layer of the PAI/FEP/PTFE=70/25/5 lubricating layer that constitutes.

[0141] under the situation that makes scroll compressor (100) running, the main shaft part (21) of live axle (20) rubs in main bearing portion (110) and bottom main bearing portion (120) by described lubricated portion (111,121).

[0142] have the lubricated portion (111,121) of described structure by setting, main shaft part (21) and lubricated portion (111,121) can be with the very long times of low coefficient of friction friction.Other structures, effect and effect are the same with first embodiment.

[0143]-second embodiment's variation-

In this variation, go up directly formation resin layer in main bearing portion (110) and bottom main bearing portion (120), perhaps go up and directly form resin layer, replace way among described second embodiment, that lubricated portion (111,121) is set between main shaft part (21) and main bearing portion (110) and bottom main bearing portion (120) in main shaft part (21).

[0144] in other words, make the substrate material surface roughness Ra that is equivalent in the outer surface of the inner surface of main bearing portion (110) and bottom main bearing portion (120) or main shaft part (21) with the part of the frictional contact surface of main bearing portion (110) and bottom main bearing portion (120) become 1 μ m by chemical surface treatment, having formed by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0145] therefore, described main bearing portion (110) and bottom main bearing portion (120) are formed in friction means or the main shaft part (21) that iron substrate material surface is provided with resin layer and are formed in the friction means that iron substrate material surface is provided with resin layer.

[0146] in this variation, because under the state that the described lubricated portion of described second embodiment (111,121) is not set, on the outer surface of the inner surface of main bearing portion (110) and bottom main bearing portion (120) or main shaft part (21), directly formed resin layer, so can seek the attenuating of manufacturing procedure number, also can seek the attenuating of number of components.Other structures, effect and effect are the same with second embodiment.

[0147] (the 3rd embodiment)

Below, according to Fig. 8 and Fig. 9, describe the third embodiment of the present invention in detail.

[0148] present embodiment is the so-called swing compressor of piston type (200) that waves.The same with described first and second embodiment, the swing compressor (200) of present embodiment is installed in the refrigerant circuit of refrigeration plant, and being used for compressed fluid is gas refrigerant.This swing compressor (200) has been taken in compressing mechanism (230) and motor (220) in dome shape housing (210), constitute full enclosed type.

[0149] described housing (210) comprises cylindrical body portion (211) and is separately positioned on the end plate (212,213) of the top and the bottom of this main part (211).Be provided with suction pipe (241) in the bottom of described main part (211), in superposed end plate (212), be provided with spraying pipe (215) and the terminal (216) of power be provided for motor (220).

[0150] described compressing mechanism (230) is arranged on the bottom in the housing (210), comprise cylinder (219) and be accommodated in the cylinder chamber (225) of this cylinder (219) interior wave piston (228).Described cylinder (219) is by cylindric cylinder part (221) with close the top of this cylinder part (221) and the fore head (222) of bottom and occiput (223) constitute.Described cylinder chamber (225) is formed by cylinder part (221), fore head (222) and occiput (223).

[0151] described motor (220) comprises stator (231) and rotor (232).This stator (231), on the main part (211) of upper fixed in housing (210) of compressing mechanism (230), rotor (232) links live axle (233).

[0152] described live axle (233) has run through cylinder chamber (225) along the vertical direction.Be in advance and be formed with main bearing portion (222a) in the portion (222) in order to supporting driving shaft (233); In occiput (223), be formed with supplementary bearing portion (223a) in order to supporting driving shaft (233).Underpart in described live axle (233) is formed with oil pump (236).Accumulate in the oil of the bottom in the described housing (210), in the (not shown) of fuel feeding road, circulate, be provided for the cylinder chamber (225) of compressing mechanism (230) etc. owing to the work of oil pump (236).

[0153] in described live axle (233), is positioned at the central part of cylinder chamber (225), is formed with eccentric part (233a).This eccentric part (233a) forms the shape of diameter greater than live axle (233).

[0154] as shown in Figure 9, the described piston (228) that waves comprises piston main body (228a) and blade (228c), and this blade (228c) is to form as one with this piston main body (228a) and from the outstanding separation parts of piston main body (228a).Described eccentric part (233a) is inserted on the inner surface of described piston main body (228a).

[0155] in described cylinder part (221), is formed with bush hole (221b).In this bush hole (221b), be inserted with the roughly lining of semicircular in shape shape (251,252) of a pair of section.Be plane, mutual face formation blade groove (229) in opposite directions in a pair of lining (251,252), described blade (228c) is inserted in this blade groove (229).A pair of lining (251,252) constitutes like this, that is: accompany under the state of blade (228c) at described lining (251,252), and blade (228c) is free to advance or retreat in blade groove (229).Simultaneously, lining (251,252) constitutes in bush hole (221b) and shakes integratedly with blade (228c).

[0156] outside of the bush hole (221b) in described cylinder part (221) is formed with in order to take in the chamber, lining rear portion (250) of blade (228c) front end.

[0157] because have said structure, so live axle (233) one rotations, waving piston (228) is that wave at the center with a point in the blade (228c) of advancing and retreat in blade groove (229) just.Because this waves, piston main body (228a) is not carrying out under the state of rotation, revolves round the sun along the inner surface of cylinder chamber (225).Remark additionally, described piston main body (228a) is when revolving round the sun, and is formed with fine gap in the position, point of contact (260) of piston main body (228a) and the inner surface of cylinder chamber (225), and this gap has the very thin oil film of formation so thick.

[0158] described blade (228c) is space, suction side (225a) and compressed side space (225b) with cylinder chamber (225) zoning.In described cylinder part (221), be formed with the suction port (214) that is communicated with space, described suction side (225a).This suction port (214) is connected with suction pipe (241).In described fore head (222), be formed with ejiction opening (242).Inner surface in cylinder part (221) is formed with ejection road (243) in the mode that is communicated with ejiction opening (242).Remark additionally, on the upper surface of described fore head (222), be formed with recess (245).In this recess (245), be provided with the ejection valve (246) that ejiction opening (215) is opened and closed.

[0159] under the situation that makes above-mentioned swing compressor (200) running, live axle (233) and main bearing portion (222a) and supplementary bearing portion (223a) friction, the eccentric part (233a) of live axle (233) and piston main body (228a) friction.In the present embodiment, be provided with the promptly lubricated portion (222b, 223b, 228b) of bearing metal respectively at described friction portion.Should lubricated portion (222b, 223b, 228b), constitute equally with first embodiment, form cylindrical shape.Described lubricated portion (222b, 223b, 228b), be that to make with iron by chemical surface treatment be that the substrate material surface roughness Ra of inner surface of parts of body material becomes 1 μ m, being provided with by ratio of components again on described substrate material surface is the friction means that lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes forms.

[0160] have the lubricated portion (222b, 223b, 228b) of such structure by setting, live axle (233) can be with the very long time of low coefficient of friction friction with lubricated portion (228b) with the eccentric part (233a) of lubricated portion (222b, 223b) and live axle (233).

[0161]-the 3rd embodiment's first variation-

In this variation, the part that in the outer surface of live axle (233), rubs with main bearing portion (222a) and supplementary bearing portion (223a), and on the outer surface of eccentric part (233a), directly form resin layer as oiling agent, perhaps at the inner surface of main bearing portion (222a) and supplementary bearing portion (223a), and directly form resin layer on the inner surface of piston main body (228a) as oiling agent, replace among described the 3rd embodiment, at main bearing portion (222a), the eccentric part (233a) of supplementary bearing portion (223a) and live axle (233) is gone up the lubricated (222b of portion that is made of miscellaneous part is set, 223b, way 228b).

[0162] in other words, make the substrate material surface roughness Ra of the inner surface of the outer surface of in the outer surface of described live axle (233) and frictional contact surface main bearing portion (222a) and supplementary bearing portion (223a) and eccentric part (233a) or main bearing portion (222a), supplementary bearing portion (223a) and piston main body (228a) become 1 μ m by chemical surface treatment, being provided with by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0163] in this variation, under the state that the lubricated portion shown in described the 3rd embodiment (222b, 223b, 228b) is not set, on live axle (233) and eccentric part (233a) or main bearing portion (222a), supplementary bearing portion (223a) and piston main body (228a), directly formed resin layer.Therefore, can seek the attenuating of manufacturing procedure number and the attenuating of number of components.Other structures, effect and effect are the same with the 3rd embodiment.

[0164]-the 3rd embodiment's second variation-

In this variation, go up at whole lining (251,252) and directly to form resin layer, replace among described the 3rd embodiment, the way of lubricating portion (222b, 223b, 228b) is set on the eccentric part (233a) of main bearing portion (222a), supplementary bearing portion (223a) and live axle (233) with miscellaneous part.

[0165] in other words, in described lining (251,252), form blade groove (229), mutual face and blade (228c) friction in opposite directions; The semi-circular side surfaces of lining (251,252) and the surface friction of bush hole (221b).Therefore, in this variation, after making the substrate material surface roughness Ra on the whole surface of lining (251,252) become 1 μ m by chemical surface treatment, having formed by ratio of components on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0166] in this variation, because on lining (251,252), directly formed resin layer, so lining (251,252) and resin laminating get tightly, and the frictional property of the semi-circular side surfaces of the frictional property of blade groove (229) and blade (228c) and lining (251,252) and bush hole (221b) improves.The advance and retreat that blade (228c) is more successfully carried out in the blade groove (229) are moved.Therefore, the reliability of the revolution motion of piston (228) improves.Other structures, effect and effect are the same with the 3rd embodiment.

[0167]-the 3rd embodiment's the 3rd variation-

In this variation, on the upper surface of described eccentric part (233a) and lower surface, directly form resin layer, replace way in described the 3rd embodiment's first variation, that resin layer is set on the outer surface of the eccentric part (233a) of the live axle (233) of swing compressor (200).

[0168] in other words, the lower surface friction of the upper surface of described eccentric part (233a) and fore head (222), the upper surface friction of the lower surface of eccentric part (233a) and occiput (223).Therefore, in this variation, after making the substrate material surface roughness Ra of the upper surface of eccentric part (233a) and lower surface become 1 μ m by chemical surface treatment, having formed by ratio of components on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0169] in this variation, because on eccentric part (233a), directly formed resin layer, so eccentric part (233a) and resin laminating get tightly, and because in cylinder chamber (225), lower in gap between eccentric part (233a) and fore head (222) and the occiput (223), so can guarantee good sealing property.Therefore, the reliability as compressor improves.Other structures, effect and effect are the same with the 3rd embodiment's first variation.

[0170] remarks additionally, if go up directly formation resin layer, just can access described effect, and as the 3rd embodiment's first variation, the frictional property of eccentric part (233a) and piston main body (228a) improves at whole described eccentric part (233a).Because do not need to be provided with the processing of resin layer, so the simplification that can seek to process for indivedual positions of eccentric part (233a).

[0171]-the 3rd embodiment's the 4th variation-

In this variation, go up and directly to form resin layer at the whole piston (228) that waves, replace in described the 3rd embodiment's first variation, the way that lubricating layer is a resin layer is set on the inner surface of piston main body (228a).

[0172] in other words, described lower surface friction of waving the upper surface and the fore head (222) of piston (228), the upper surface friction of the lower surface of piston (228) and occiput (223), the inner surface friction of the outer surface of piston main body (228a) and cylinder part (221), the inner surface of piston main body (228a) and eccentric part (233a) friction, the mutual face friction in opposite directions of the side surface of blade (228c) and lining (251,252).Therefore, in this variation, make the substrate material surface roughness Ra on the whole surface of piston (228) become 1 μ m by chemical surface treatment after, having formed by ratio of components on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0173] in this variation, because directly formed resin layer, so do not need indivedual positions are implemented to handle the simplification that can seek to process whole waving on the piston (228).Because the frictional property of blade (228c) and lining (251,252) improves, the advance and retreat of blade (228c) are very smooth, so the revolution motion of piston main body (228a) is very correct.In addition, lower in the gap between the described internal surface that waves piston (228) and cylinder chamber (225), can guarantee good sealing property.Therefore, the reliability as compressor improves.Other structures, effect and effect are the same with the 3rd embodiment.

[0174]-the 3rd embodiment's the 5th variation-

In this variation, directly form resin layer on the inner surface of the upper surface of lower surface, occiput (223) of portion (222) and the cylinder part (221) of being in advance, replace in described the 3rd embodiment's the 3rd and the 4th variation, go up the way of formation resin layer at eccentric part (233a) and piston (228a) as oiling agent.

[0175] in other words, the upper surface friction of the upper surface of the lower surface of described fore head (222) and eccentric part (233a) and piston main body (228a), the lower surface friction of the lower surface of the upper surface of occiput (223) and eccentric part (233a) and piston main body (228a), the outer surface friction of the inner surface of cylinder part (221) and piston main body (228a).Therefore, in this variation, make the substrate material surface roughness Ra of the inner surface of the upper surface of lower surface, occiput (223) of fore head (222) and cylinder part (221) become 1 μ m by chemical surface treatment, having formed by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.

[0176] in this variation, directly formed resin layer on the inner surface of the upper surface of the lower surface of the portion because be in advance (222), occiput (223) and cylinder part (221), so fore head (222), occiput (223) and cylinder part (221) get tightly with the resin laminating.Because on the inner surface of the upper surface of the lower surface of the fore head (222) that forms cylinder chamber (225) internal surface, occiput (223) and cylinder part (221), be formed with resin layer, so lower in the gap between the upper surface of this cylinder chamber (225) internal surface and the eccentric part that internal surface contacted and rubbed (233a) of cylinder chamber (225) and upper surface, lower surface and the outer surface of lower surface and piston main body (228a), can guarantee good sealing property.Therefore, the reliability as compressor improves.Other structures, effect and effect are the same with the 3rd embodiment.

[0177] (the 4th embodiment)

The fourth embodiment of the present invention is a swing compressor (300) shown in Figure 10.The compressing mechanism of present embodiment (301) comprises a plurality of cylinder main bodys (325,326), replaces described the 3rd embodiment's structure compressing mechanism (230), that comprise a cylinder (219).Other structures and effect, the same with the 3rd embodiment's swing compressor (200).

[0178] the same with described the 3rd embodiment, the swing compressor (300) of present embodiment is installed in the refrigerant circuit of refrigeration plant, and being used for compressed fluid is gas refrigerant.Remark additionally,, only the compressing mechanism (301) with a plurality of cylinder main bodys (325,326) is described at this.

[0179] in described compressing mechanism (301), is provided with two cylinder main bodys (325,326).These two cylinder main bodys (325,326), being set to along the direction that live axle (314) is extended is that above-below direction is arranged.

[0180] fore head (307) is set in place on the upper surface of the first cylinder main body (325) of upside, and occiput (308) is set in place on the lower surface of the second cylinder main body (326) of downside.Between the described first cylinder main body (325) and the second cylinder main body (326), be provided with intermediate plate (327) as demarcation strip.Middle body in described intermediate plate (327) is formed with the through hole (327a) of live axle (314).

[0181] above-mentioned fore head (307), the first cylinder main body (325), intermediate plate (327), the second cylinder main body (326) and occiput (308) are set up successively, link up by bolt.Described live axle (314) has run through two heads (307,308), two cylinder main bodys (325,326) and intermediate plate (327).

[0182] in the described first cylinder main body (325), is provided with first and waves piston (333), in the second cylinder main body (326), be provided with second and wave piston (334).In the present embodiment, be formed with two pressing chambers i.e. first pressing chamber (335) and second pressing chamber (336), this first pressing chamber (335) is formed by fore head (307), the first cylinder main body (325), first piston (333) and intermediate plate (327) zoning; This second pressing chamber (336) is formed by occiput (308), the second cylinder main body (326), second piston (334) and intermediate plate (327) zoning.

[0183] under the situation that makes described swing compressor (300) running, the upper surface of intermediate plate (327) and first waves the lower surface friction of piston (333), and the lower surface of intermediate plate (327) and second waves the upper surface friction of piston (334).Therefore, in the present embodiment, make the upper surface of intermediate plate (327) and the substrate material surface roughness Ra of lower surface become 1 μ m by chemical surface treatment, having formed ratio of components again on described substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0184] according to present embodiment, because on intermediate plate (327), directly formed resin layer, so intermediate plate (327) and resin laminating get tightly.In addition, lower in the gap that the lower surface and second that the upper surface of intermediate plate (327) and first waves gap on the frictional contact surface of lower surface of piston (333) and intermediate plate (327) waves on the frictional contact surface of upper surface of piston (334), can guarantee good sealing property.Therefore, the reliability as compressor also improves.Other structures, effect and effect are the same with the 3rd embodiment.

[0185]-the 4th embodiment's variation-

In this variation, wave piston (333) and whole second whole first and wave piston (334) and go up and directly to form resin layer, replace among described the 4th embodiment, on the upper surface of intermediate plate (327) and lower surface, form the way of resin layer as oiling agent.

[0186] in other words, make first to wave the substrate material surface roughness Ra that piston (333) and second waves piston (334) and become 1 μ m by chemical surface treatment, directly having formed ratio of components again on described substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0187] in this variation, waves on the piston (334) and directly formed resin layer because wave piston (333) and second, so first waves piston (333) and second and wave piston (334) and get tightly with the resin laminating first.The same with described the 4th embodiment, first waves the gap of gap and second between the upper surface of the lower surface of piston (333) and intermediate plate (327) waving between the lower surface of the upper surface of piston (334) and intermediate plate (327) lowers, and can guarantee good sealing property.Therefore, the reliability as compressor also improves.Other structures, effect and effect are the same with the 4th embodiment.

[0188] (the 5th embodiment)

As Figure 11 and shown in Figure 12, the compressor in the present embodiment is a rotary-piston type rotary compressor (400).

[0189] structure of structure of this rotary compressor (400) and described the 3rd embodiment's swing compressor (200) is roughly the same, take in compressing mechanism (420) and motor (430) in the inside of full enclosed type housing (410), comprised spraying pipe (415) and suction pipe (414).As shown in figure 12, in described rotary compressor (400), constitute the rotary-piston (424) and the blade (426) of compressing mechanism (420) by different parts, rotary-piston (424) Yi Bian carry out rotation, Yi Bian revolve round the sun along the inner surface of cylinder chamber (425).

[0190] the same with described first embodiment, described rotary compressor (400) is installed in the refrigerant circuit of refrigeration plant, and being used for compressed fluid is gas refrigerant.Remark additionally, this only to the structure of the rotary compressor (400) of present embodiment in the 3rd embodiment's the different part of swing compressor (200), promptly compressing mechanism (420) describes.

[0191] described compressing mechanism (420) comprises cylinder part (421), fore head (422) and occiput (423), and described cylinder part (421), fore head (422) and occiput (423) form cylinder chamber (425).

[0192] is formed with main bearing portion (422a) at described fore head (422), in described occiput (423), is formed with supplementary bearing portion (423a) in order to supporting driving shaft (433) in order to supporting driving shaft (433).The eccentric part that is positioned at cylinder chamber (425) (433a) in the live axle (433) forms the shape of diameter greater than the main part of live axle (433).Described eccentric part (433a) is inserted in the rotary-piston (424) of compressing mechanism (420).Described rotary-piston (424) forms circular, and the outer surface that forms this rotary-piston (424) contacts with the inner surface of a point with cylinder (421) basically.

[0193] in described cylinder (421), is formed with blade groove (421a) along the diametric(al) of this cylinder (421).Blade (426) is arranged in this blade groove (421a) in the mode that contacts with cylinder (421) and rub.The spring (427) that is arranged in the blade groove (421a) provides the strength of the progresses inside on diametric(al) for described blade (426), and the front end of this blade (426) always contacts with the outer surface of rotary-piston (424).

[0194] described blade (426), cylinder chamber (425) zoning that will be positioned between the outer surface of the inner surface of cylinder (421) and rotary-piston (424) is suction chamber (425a) and pressing chamber (425b).In described cylinder (421), be formed with the suction port (428) that suction pipe (414) and suction chamber (425a) are communicated with.In described fore head (422), be formed with the ejiction opening (429) that makes the spatial communication in pressing chamber (425b) and the housing (410).

[0195] remarks additionally, in the upper surface of described fore head (422), be formed with recess (440).The ejection valve (441) that ejiction opening (429) is opened and closed is arranged in this recess (441).

[0196] under the situation that makes described rotary compressor (400) running, the inner surface friction of the outer surface of rotary-piston (424) and cylinder (421), the upper surface of rotary-piston (424) contacts with the lower surface of fore head (422) and rubs, and the lower surface of rotary-piston (424) contacts with the upper surface of occiput (423) and rubs.Therefore, in the present embodiment, make the substrate material surface roughness Ra of whole rotary-piston (424) become 1 μ m by chemical surface treatment, directly having formed ratio of components again on described substrate material surface is the resin layer of PAI/FEP/PTFE=70/25/5.

[0197] like this, directly form resin layer by going up at whole described rotary-piston (424), rotary-piston (424) and resin laminating get tightly.In addition, described rotary-piston (424) improves with the frictional property of fore head (422) and occiput (423), and lower in the gap on this frictional contact surface.Therefore, can guarantee cylinder chamber (425), good sealing property.

[0198] remarking additionally, also can be such, and in the present embodiment, on the friction portion the same with described the 3rd embodiment and the 3rd embodiment's first to the 5th variation lubricating layer being set is resin layer.

[0199] particularly, because live axle (433) and main bearing portion (422a) and supplementary bearing portion (423a) friction, eccentric part (433a) and piston (424) friction so also can be such, be provided with the promptly lubricated portion (422b, 423b, 433b) of bearing metal on described friction portion.(422b, 423b, 433b) is cylindrical in described lubricated portion, it is following friction means, that is: with iron body material, make the substrate material surface roughness Ra of the circumferential surface of described body material become 1 μ m by chemical surface treatment, being provided with by ratio of components again on described body material is the friction means that lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes forms.By described lubricated portion (422b, 423b, 433b) is set, the friction portion of live axle (433) and main bearing portion (422a) and supplementary bearing portion (423a) and eccentric part (433a) improve with the frictional property of the friction portion of piston (424).

[0200] also can be such, lubricated (the 422b of portion be not set, 423b, under state 433b), make in the outer surface of live axle (433) part that contacts with main bearing portion (422a) and supplementary bearing portion (423a) and rub and the outer surface of eccentric part (433a) by chemical surface treatment, perhaps the substrate material surface roughness Ra of the inner surface of the inner surface of main bearing portion (422a) and supplementary bearing portion (423a) and piston (424) becomes 1 μ m, and forming by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.In such event, the friction portion of live axle (433) and main bearing portion (422a) and supplementary bearing portion (423a) and eccentric part (433a) just improve under the state that lubricated portion (422b, 423b, 433b) be not set with the frictional property of the friction portion of piston (424).

[0201] in addition, because blade (426) and blade groove (421a) friction, so also can be such, (421 a) the substrate material surface roughness Ra on surface become 1 μ m, and forming by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes to make blade (426) or blade groove by chemical surface treatment.Like this, the advance and retreat motion of blade (426) in blade groove (421a) just becomes smoothly, thus piston (424) rotation the revolution motion that carries out also very smooth, also improve as the reliability of compressor.

[0202] because the upper surface of described eccentric part (433a) and the lower surface friction of fore head (422), the upper surface friction of the lower surface of eccentric part (433a) and occiput (423), so also can be such, make the upper surface of eccentric part (433a) and the substrate material surface roughness Ra of lower surface become 1 μ m by chemical surface treatment, forming by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.Like this, improve at the frictional property of eccentric part (433a) with the frictional contact surface of fore head (422) and occiput (423), and the attenuating of the gap of this friction portion, can guarantee good sealing property.

[0203] also can be such, make the substrate material surface roughness Ra of the upper-end surface of the lower end surface of inner surface, fore head (422) of the cylinder part (421) that forms described cylinder chamber (425) and described occiput (423) become 1 μ m by chemical surface treatment, being provided with by ratio of components again on described substrate material surface is the lubricating layer that the resin layer of PAI/FEP/PTFE=70/25/5 constitutes.Like this, the internal surface of cylinder chamber (425), with the upper surface and the lower surface of the eccentric part (423a) of the internal surface of this cylinder chamber (425) friction, upper surface, lower surface and the outer surface of piston (424), and the frictional property of the upper surface of blade (426) and lower surface just improves.And lower in the gap of described friction portion, can guarantee good sealing property.Therefore, the reliability as compressor improves.Other structures, effect and effect are the same with the 3rd embodiment.

[0204] (other embodiment)

Also described each embodiment can be made as following structure.

[0205] in described first to the 5th embodiment, on friction portions such as bearing portion, scroll portion, cylinder and piston, formed resin layer as oiling agent.So long as the part of friction, just also can on the part beyond the described part, same formation make the degree of roughness of substrate material surface become the surface roughness Ra of regulation, on described substrate material surface, form the lubricated portion that comprises the resin layer of fluorine resin and form again.

[0206] in first to the 5th embodiment, make the substrate material surface roughness Ra of the friction means of scroll compressor (10,100), swing compressor (200,300) or rotary compressor (400) become the roughness of regulation, on described substrate material surface, formed the resin layer that comprises fluorine resin again.But, convection cell compress, any type of compressor can be as object.Fluid is not limited to refrigeration agent.Say that again friction means of the present invention is not limited to be used for the friction means of compressor.So long as the part of friction just can be utilized the present invention, for example: the drive portion or the rotary part of friction means, vehicle or the manufacturing installation etc. of the fluid machinery beyond the compressor grade.

[0207] above-mentioned friction part is assigned to say, also can only make the substrate material surface roughness Ra of parts in two parts of mutual friction become the roughness of regulation, on described surface, form the resin layer that comprises fluorine resin again; Also can make the substrate material surface roughness Ra of two parts of mutual friction all become the roughness of regulation, on described surface, form the resin layer that comprises fluorine resin again.

[0208] body material of described friction means is not limited to iron, also can be iron metals in addition such as aluminium.

[0209] surface roughening of described body material is handled and is not limited to chemical surface treatment, also can utilize known the whole bag of tricks such as sand blast.The medicament that is used for chemical surface treatment is not limited to manganese phosphate, can use other phosphate and other known liquid preparations.

-industrial applicibility-

[0210] in sum, friction means involved in the present invention and compressor have good friction Performance, to conditioner, vehicle, manufacturing installation and machine tool etc. of great use.

Claims (19)

1. friction means, this friction means comprises the resin layer that contains fluororesin on the surface of metallic body material, it is characterized in that:

Described substrate material surface is handled arithmetic mean height Ra with profilogram greater than 0.5 μ m and less than the surface roughness of 10 μ m by surface roughening.

2. friction means according to claim 1 is characterized in that:

Arithmetic mean height Ra with profilogram is handled greater than 0.75 μ m and less than the surface roughness of 10 μ m in the surface of described body material by surface roughening.

3. friction means according to claim 1 is characterized in that:

Described surface roughening is handled, and is chemical surface treatment.

4. friction means according to claim 1 is characterized in that:

Described resin layer contains polyamide-imide resin.

5. friction means according to claim 1 is characterized in that:

The surface layer of described body material is handled without overvulcanization.

6. fluid machinery, this fluid machinery comprises friction means, it is characterized in that:

Described friction means comprises the resin layer that contains fluororesin at least a portion on the surface of metallic body material;

Arithmetic mean height Ra with profilogram is handled greater than 0.5 μ m and less than the surface roughness of 10 μ m in the surface of the body material of described resin layer by surface roughening.

7. fluid machinery according to claim 6 is characterized in that:

Arithmetic mean height Ra with profilogram is handled greater than 0.75 μ m and less than the surface roughness of 10 μ m in the surface of the body material of described resin layer by surface roughening.

8. fluid machinery according to claim 6 is characterized in that:

Described surface roughening is handled, and is chemical surface treatment.

9. fluid machinery according to claim 6 is characterized in that:

Described resin layer contains polyamide-imide resin.

10. fluid machinery according to claim 6 is characterized in that:

Described friction means is present in the refrigeration agent.

11. fluid machinery according to claim 10 is characterized in that:

Described refrigeration agent comprises the material that contains fluorine.

12. fluid machinery according to claim 10 is characterized in that:

Oiling agent is below 5% to the composite rate of described refrigeration agent.

13. fluid machinery according to claim 10 is characterized in that:

In described refrigeration agent, unmixed basically have an oiling agent.

14. fluid machinery according to claim 6 is characterized in that:

Comprise vortex mechanism (40), have intermeshing a pair of scroll portion (50,60);

In a pair of scroll portion (50,60) at least one constitutes friction means;

Described is the scroll portion (50,60) of friction means, comprises described resin layer at least a portion on the surface of metallic body material.

15. fluid machinery according to claim 14 is characterized in that:

Described resin layer is formed directly in the bearing portion (53) of movable scroll portion (50).

16. fluid machinery according to claim 14 is characterized in that:

Described resin layer is formed directly on the whole movable scroll portion (50).

17. fluid machinery according to claim 14 is characterized in that:

Described resin layer is formed directly on the movable side clinch (52) of movable scroll portion (50).

18. fluid machinery according to claim 14 is characterized in that:

Described resin layer is formed directly on whole and movable scroll portion (50) face in opposite directions in the fixed scroll portion (60).

19. fluid machinery according to claim 6 is characterized in that:

Comprise vortex mechanism (40), have intermeshing a pair of scroll portion (50,60);

The thrust-bearing (80) of the movable scroll portion (50) in the described a pair of scroll portion (50,60) constitutes friction means;

Described is the thrust-bearing (80) of friction means, is going up the direct described resin layer that forms with the frictional contact surface (81) of movable scroll portion (50).

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