CN1423057A

CN1423057A - Compressor

Info

Publication number: CN1423057A
Application number: CN 02155775
Authority: CN
Inventors: 平野秀夫; 北村武男; 足立彻
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 2001-12-05
Filing date: 2002-12-05
Publication date: 2003-06-11
Anticipated expiration: 2022-12-05
Also published as: JP2003172264A; CN1276183C; JP3961274B2

Abstract

In the compressor, HFC based coolant, HC based coolant or CO2 is used as a coolant and an ester oil an ether oil, PAG oil, a carbonate oil, an alkylbenzene oil, a naphthene based mineral oil or a paraffin based mineral oil is used as a lubricant of a compression mechanism part. At least a pair of members 31, 32 sliding each other and contacted with the coolant of the compression mechanism part 30 or at least one of 32 and 35 is formed by Al alloy and an iron based hard film is formed on a slide surface of at least one member comprising Al alloy. Thereby, enhancing durability by realizing an ensuring of lubrication and a low friction coefficient at a slide part.

Description

Compressor

Technical field

The present invention relates to use HFC series coolant, HC series coolant or CO2, use the compressor that ester oil, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or the paraffin series mineral oil of intermiscibility are arranged with these refrigeration agents as lubricant oil as refrigeration agent.

Background technique

Employed in the past aircondition and cooling unit is the HCFC series coolant of representative with R22, we can say from its physical properties stable to damage the ozone layer.Therefore, begin to utilize the HFC series coolant now, as the alternative of HCFC series coolant.

As this compressor, known have a compressor described in the Japanese kokai publication hei 07-293468 communique.This compressor as shown in Figure 7, as compressor 80, makes and uses compressing mechanism 83 and the compressor so-called easy to maintenance in motor 82 is accommodated in container 81.For with compressing mechanism 83 refrigerant compressed, use the HFC refrigeration agent, the refrigerator oil 84 for the slide part of lubricate compressors structure 83 uses the above ester oil of 4 valencys that intermiscibility is arranged with described refrigeration agent.Refrigerator oil 84 is stored in the bottom of container 81, along with the driving of compressing mechanism 83, utilizes its head pressure or displacement pump to supply with lubricated back, return reservoir and repeat later circulation to slide parts such as compressing mechanism 83 and bearing portions thereof.On the other hand, refrigerator oil 84 is carried also lubricated each several part by utilizing with the intermiscibility of refrigeration agent.But, because HFC series coolant, HC series coolant, CO2 are not chloride, so often because of lubricity or the low influence of lubricity that does not have the such refrigeration agent self of chloride HCFC series coolant makes lack of lubrication, the shortage durability.

For to tackle in its compressor shown in Figure 7, in the group of for example connecting rod 85 of the slide part that constitutes compressing mechanism 83 and bent axle 86, connecting rod 85 is by carrying out alumite as main body to the surface with aluminium material, bent axle 86 is by using the metallic material of carbon steel etc., improve wear resistance respectively, guarantee under the HFC series coolant running with corresponding long-term stability easy to maintenance.

But said structure has following problem:

(1) utilizing on the oxide layer surface of alumite be full of cracks more, the oil to slide part is supplied with makes the load capacity decline of bearing because its part is become separated in flight to be full of cracks place of oxide layer surface.

(2) though utilize alumite to form oxide skin(coating) from the teeth outwards, this oxide skin(coating) lipophile is lower, and especially the ester oil that polarity is high is difficult to be adsorbed on the oxide layer surface, causes the lubricant oil deficiency on the surface of slide part easily.

Its result becomes high friction in high loaded process, may destroy the more crisp oxide skin(coating) that is produced by alumite, and also can prediction in the transition operation when easily causing the startup of lubricant oil deficiency etc. can produce significantly that durability reduces.

The objective of the invention is to, guarantee the lubricant oil in the slide part of compression mechanical part, obtaining low friction factor, thereby provide durability high compressor.

The summary of invention

In order to achieve the above object, compressor of the present invention is to use HFC series coolant, HC series coolant or CO2 as refrigeration agent; Lubricant oil as compression mechanical part uses ester oil, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or paraffin series mineral oil, it is characterized in that, in at least 1 group member that slides over each other of compression mechanical part at least one formed by aluminum alloy, and forming iron on the slip surface of at least one member that is made of aluminum alloy is hard films.

In such structure, owing to use not chloride HFC series coolant, HC series coolant or CO2 so can not damage the ozone layer.In addition, owing to use the ester oil, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or the paraffin series mineral oil that mix with it, except himself provide lubricated is provided, also can carry out by lubricating that refrigeration agent is carried as lubricant oil.Especially, because at least 1 of the 1 group of member that slides over each other at least of compression mechanical part is constituted with aluminum alloy, except the lightweight that can obtain to be directly proportional with the aluminium alloy element number, on the slip surface of at least 1 member that constitutes by aluminum alloy, can guarantee not resemble the such crisp stable iron of alumite the low coefficient of frictionization of the hard that is hard films and the high-lubricity of the oily adsorptivity of excellence, owing to can improve chronically in the wear resistance of facing on the slide part of this slip surface, described iron is the fatigue strength that hard films also improves aluminium alloy element for a long time, so can obtain long lifetime.In addition, because described high-lubricity is also brought into play high leak tightness, so can obtain high compression performance steadily in the long term.Transition operation when in addition, described high-lubricity is for the startup of lubricant oil deficiency often is especially effective.

On being the surface of hard films, described iron is provided with again in the structure of melt processing layer, owing to further increase the surface hardness of aluminium alloy element, so the wear resistance of corresponding raising aluminium alloy element and durability.

Be scattered in the structure of the described layer of melt processing again at solid lubricant, because this solid lubricant obtains lubricating between the slip surface of aluminium alloy element and the opposing party's slip surface, even so under the drying regime of supplying lubricating oil not, also can turn round, with any reason not occasion of supplying lubricating oil and the occasion of lubricant oil deficiency, or the lubricant oil position that is difficult to supply with and preferably not the position of supplying lubricating oil be effective especially.

Described 1 group of member, be in turbocompressor, with the fixed side turbine that forms pressing chamber between mutually and movable side turbine or and the fixed side turbine between form the movable side turbine of pressing chamber and retrain its from then make its rotation restraint device that carries out the circular orbit motion member respectively be combined as representative, the both sides of 1 group of member utilize aluminum alloy to constitute, by only forming described iron on side's slip surface of 1 group of member is that hard films realizes the sliding motion structure between dissimilar metal, can avoid the adhesion problem that is easy to generate during lack of lubrication between mutually in identical material.Though forming iron on the both sides of 1 group of member is that hard films also can be guaranteed bipartite high-lubricity, wear resistance and sealing, only is located on the side to reduce cost.

1 group of member, it is the clutch release slave cylinder in the rotary compressor, the piston that in this clutch release slave cylinder, rotates, to become the blade of the clutch release slave cylinder side in compression volume and suction space by the formed apart of this clutch release slave cylinder and piston, the metal (upper member that the both ends of the surface of clutch release slave cylinder and piston are sealed, with the bent axle of driving force to described piston transmission, piston is formed by aluminum alloy, forming described iron on this piston is in the structure of hard films, only 1 piston is made and be formed with the aluminum alloy that iron is hard films, at the clutch release slave cylinder that slides over each other with this piston, blade, in all slide parts between metal (upper member and the bent axle, can guarantee to realize the sliding motion structure between dissimilar metal mutually, by described iron is the high-lubricity that hard films produces, wear resistance and sealing, and can improve the fatigue strength of piston, and, can obtain the piston lightweight of eccentric rotation, can also obtain simultaneously counterweight miniaturization for the eccentric rotation of piston, lightweight, its result, can further run up, can the expansion capability control range.

1 group of member, it is the clutch release slave cylinder in the rotary compressor of impeller type, be provided in the rotor of this clutch release slave cylinder inside, axle this rotor of supporting and anterior side plate and rear portion side plate that the rear and front end of described clutch release slave cylinder is sealed, be contained in the blade that is formed in the described epitrochanterian blade groove sliding freely, described clutch release slave cylinder, anterior side plate, rear portion side plate and blade form with aluminum alloy, forming described iron on clutch release slave cylinder is in the structure of hard films, utilize the not eccentric rotation of rotor, other members are made aluminium alloy element and obtain significantly lightweight, and only to be provided with iron on the slip surface of clutch release slave cylinder be hard films, can guarantee between slide rapid clutch release slave cylinder and rotor and blade by iron to be the high-lubricity of hard films generation, wear resistance and sealing, and with iron is that hard films improves the fatigue strength as the clutch release slave cylinder of pressurized container, and can further increase the maximum load that can turn round.

1 group of member, it is the clutch release slave cylinder in the Linearkompressor, the piston that in this clutch release slave cylinder, is supported sliding freely along its axial direction, this clutch release slave cylinder and aluminium alloys for pistons are formed, forming iron on its at least one side is in the structure of hard films, both sides at clutch release slave cylinder and piston obtain lightweight, and in the occasion of Linearkompressor, usually, when starting and the piston in when stopping to contact with the single face of clutch release slave cylinder and become the former of wearing and tearing or burn easily thereby set more lubricants capacity, the iron that utilization is formed at least one side of piston and clutch release slave cylinder is hard films and obtain high-lubricity, wear resistance and sealing, thus can will be used to start the time and the essential lubricants capacity when stopping to suppress lessly.And, be hard films and when improving fatigue strength, can further increase the maximum load that can turn round when form iron in the clutch release slave cylinder side that becomes pressurized container.

The above object of the present invention and feature just can be understood by the record of following detailed description and accompanying drawing.Each feature of the present invention can be individually or with various possible combinations, the compound employing.

The simple declaration of accompanying drawing

Fig. 1 is the example of the turbocompressor occasion of expression the invention process form, (a) is whole sectional view, (b) is the local amplification view of fixed side, movable each turbine of side.

Fig. 2 is the sectional view of example of the turbocompressor occasion of expression the invention process form.

Fig. 3 is the sectional view of the compression mechanical part in the compressor of Fig. 2.

Fig. 4 is the sectional view of example of the impeller type rotary compressor occasion of expression the invention process form.

Fig. 5 is the sectional view of the compression mechanical part in the compressor of Fig. 4.

Fig. 6 is the sectional view of example of the Linearkompressor occasion of expression the invention process form.

Fig. 7 is a sectional view of representing the example of reciprocal compressor occasion in the past.

The working of an invention form

Explain example of the present invention with reference to Fig. 1-Fig. 6, to understand the present invention.Following invention is a concrete example of the present invention, is not the qualification to the patent claim content.

In this example, represented shown in the example of the example of Fig. 1, Fig. 2, Fig. 3 and Fig. 6 compression mechanical part 30,50,70 with the motor part 20,73 that drives them be contained in the so-called sealed type in the container compressor easy to maintenance situation and as Fig. 4, compression mechanical part 60 shown in Figure 5 situations of formations separately, but the invention is not restricted to these, all compressors that are applied to have slide part all are effectively, all belong to scope of the present invention.The refrigeration agent of each compressor of this example all uses HFC series coolant, HC series coolant or CO2, as lubricant oil 42 use ester oils, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or the paraffin series mineral oil of compression mechanical part.Thus, use the unsettled HFC series coolant of rerum natura, HC series coolant or CO2 owing to resemble the HCFC, so do not damage the ozone layer.In addition, because ester oil, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or the paraffin series mineral oil that will mix with it is as lubricant oil 42, so except by supplying with himself lubricated, also utilize lubricating that refrigeration agent carries.

Especially, at least 1 at least 1 group member that slides over each other in the compression

mechanical part

30,50,60,70 is formed with aluminum alloy, forming iron at least on the slip surface of 1 member that is made of aluminum alloy is hard films.Thus, seek with at compression

mechanical part

30,50,60, the lightweight aspect that the number of components of the aluminium alloying in 70 is directly proportional, on the slip surface of at least 1 member that constitutes by the aluminum alloy in the 1 group of member that slides over each other, since guarantee by do not resemble the pellumina processing layer crisp stable iron be the high-lubricity that oily adsorptivity produced of the low coefficient of frictionization that hard produced and the excellence of hard films, and improve simultaneously wear resistance chronically in the face of the slide part of this slip surface, described iron is the fatigue strength that hard films also improves aluminium alloy element chronically, so can obtain compression

mechanical part

30,50,60,70 long lifetime.In addition, because described high-lubricity is also brought into play high leak tightness, so can stably obtain high compression performance chronically.

This occasion is preferably in melt processing layer again is set on the surface that described iron is hard films.Like this, owing to further increase the surface hardness of aluminium alloy element, so the wear resistance of corresponding raising aluminium alloy element and durability.In addition, on the described layer of melt processing again, preferably make the state that solid lubricant is disperseed.Like this, because this solid lubricant is lubricated between the slip surface of aluminium alloy element and the opposing party's slip surface, even under the dried state that does not have lubricant oil to supply with, also can turn round, in the occasion of occasion former because of certain thereby not supplying lubricating oil and lubricant oil deficiency, or be difficult to the place of supplying lubricating oil and not supplying lubricating oil be effective especially for good position.

Example shown in Fig. 1 (a) and (b) is an example of turbocompressor occasion.Container 10 has suction pipe 11 and discharge tube 12 shown in Fig. 1 (a), by being connected to become closed state with outer loop.Motor part 20, constitute by being fixed in stator all in the container 10 21 and being positioned at its inboard rotor 22, rotor 22 is made to integrated under the state of the bent axle 33 that connects portion of drive compression mechanism 30, bent axle 33 utilizes the supplementary bearing 34a of the main bearing 34 of compression mechanical part 30 sides and compression mechanical part 30 opposition sides and by the axle supporting, utilizes the action of motor part 20 and rotate integratedly with rotor 22.

Compression mechanical part 30 is made of fixed side turbine 31 that forms pressing chamber 30A and movable side turbine 32, and following repeatedly action: movable side turbine 32 utilizes bent axle 33 to rotate by main shaft 33A, swivel bearing 33B, self running shaft 32F relative fixed side turbine 31 by transmission and on circular orbit from the driving force of motor part 20, pressing chamber 30A for example makes volume diminish, suck and compressed refrigerant from outer loop on one side by moving to central part from outer circumferential side on one side, and the refrigeration agent after the compression is supplied with to outer loop through the spaces in the container 10.

Fixed side turbine 31 has described main bearing 34, and utilizes bolt etc. to be installed on the one side as the main bearing member 29 of the support member on the interior week that is fixed on container 10, sandwiches movable side turbine 32 between main bearing member 29 and fixed side turbine 31.The partition ring 35 that the rotation of the movable side turbine 32 of constraint is set, only leads between main bearing member 29 and movable side turbine 32 as rotation restraint device one example with carrying out the circular orbit motion.Partition ring 35 utilization is formed at the projection at 2 places on the 1st diameter line of one side side and engages with movable side turbine 32 on the 1st diameter line direction with sliding over each other, utilizes the projection at 2 places on the 2nd diameter line with described the 1st diameter line quadrature that is formed at the another side side and engages with main bearing member 29 on the 2nd diameter line direction with sliding over each other.

Fixed side turbine 31 has: the fixed side vane member 31A that forms scroll; Be configured for forming the fixed side runner plate 31B of bottom surface of the groove of this fixed side vane member 31A; Be formed on the peripheral part of fixed side vane member 31A and with the fixed side end thrust face 31C of movable side turbine 32 butts; Be formed at the tap hole 31D on the central part of runner plate 31B.Movable side turbine 32 has: the movable lateral lobe sheet element 32A that forms scroll; Be configured for forming the movable side mirror plate 32B of bottom surface of the groove of this movable lateral lobe sheet element 32A; Be formed on the peripheral part of movable lateral lobe sheet element 32A and with the movable side shaft of fixed side turbine 31 butts to thrust face 32C; Back side 32E; At the outstanding described running shaft 32F that forms of the central part of this back side 32E side; Fuel feeding road 32G at fixed side end thrust face 31C and movable side shaft supplying lubricating oil between thrust face 32C.

The described supplementary bearing 34a of bent axle 33 is maintained at as on the supplementary bearing member 34b that is fixed in the support member on weeks in the container 10, as the displacement pump 41 of an example of lubricant pump, utilize this supplementary bearing member 34b to install and utilize bent axle 33 to be driven with compression mechanical part 30.When driving displacement pump 41, suck the lubricant oil 42 that the bottom in the container 10 is stayed in storage by fuel supply line 43, supply with and make their lubricated and cooling at the fuel supply line 43 that axial direction forms to swivel bearing 33B and main bearing 34 in central authorities' process of bent axle 33.The part of the lubricant oil of the high pressure liquid storing part of arrival between swivel bearing 33B and main bearing 34, fuel feeding road 32G by movable side turbine 32 is supplied in fixed side end thrust face 31C and movable side shaft between thrust face 32C, when the slide part that makes compression mechanical part 30 is lubricated, seal, on the other hand, after reaching the decompression of being stipulated through back pressure chamber 28 throttlings, make and make movable side turbine 32 reversings and do not separate or topple with the fixed side turbine to the periphery back of the movable side mirror plate 32B of movable side turbine 32.In addition, back pressure chamber 28 also with the spatial communication that is provided with of described partition ring 35, also lubricated partition ring 35 and the movable slide part between side turbine 32 and the main bearing member 29.The lubricant oil 42 of lubricate compressors structure portion 30 is discharged in container 10 with refrigeration agent.More than the action of such lubricant oil 42, work to being stored up the lubricant oil 42 that stays by the head pressure of the refrigeration agent of temporarily in container 10, discharging from compression mechanical part 30, also can utilize this head pressure to carry out fuel feeding by bent axle 33.

In running, vibrate in the compressor of less and quiet turbo type with above such structure, the 1 group of member that slides over each other is with the fixed side turbine 31 that forms pressing chamber 30A between mutually and movable side turbine 32 or movable side turbine 32 and its rotation of constraint and respectively be combined as representative as the partition ring 35 of the member that carries out the rotation restraint device that circular orbit moves.When utilizing aluminum alloy to form the both sides of at least one group member in these groups, aspect thus obtained lightweight, owing to utilize is that hard films realizes the sliding motion structure between the dissimilar metal at the described iron that forms on a side the slip surface only, so the bonding problem that is easy to generate can avoid between identical material is mutual lack of lubrication the time.Though forming iron the both sides of one group of member is that hard films also can be guaranteed bipartite high lubricity, wear resistance and sealing, only is located at once the side and can reduces cost.

In this example, fixed side turbine 31, movable side turbine 32 and partition ring 35 are made aluminium alloy element, especially shown in Fig. 1 (b), applying iron plating on movable side turbine 32 is hard films 100 as iron.The surface of this iron plating is carried out shot peening with solid lubricant, the moment ground dispersed melt processing again of formation solid lubricant layer on the skin section of the iron plating of fusion cooling.Preferably, the thickness of iron plating is 5-100 μ m, the thickness of melt processing layer is that 2-30 μ m, surface roughness Rmax are below the 8 μ m again.This iron plating, be formed on the movable lateral lobe sheet element 32A of movable side turbine 32, movable side mirror plate 32B, movable side shaft to thrust face 32C, back side 32E, with the engagement groove of the protrusions snap of partition ring 35, running shaft 32F on.Promptly be formed on all faces.

The side of fixed side vane member 31A and movable lateral lobe sheet element 32A contacts on a plurality of positions of being everlasting in the driving of movable side turbine 32.This contact position is along with movable side turbine 32 carries out the revolution of circular orbit motion and moves.It moves stenosis inchmeal from the peripheral part of pressing chamber 30A to central part.Utilization volume-variation at this moment can play the effect of described suction, compression, discharge.

On the other hand, lubricant oil 42 on container 10 inner bottom parts, utilize displacement pump 41 up to inhale from fuel supply line 43, by being located at the fuel supply line 43 on the bent axle 33, supply with to swivel bearing 33B, running shaft 32F, then, supply with to thrust face 32C to fixed side end thrust face 31C and movable side shaft by the fuel feeding road 32G that is formed at movable side turbine 32.To the lubricant oil 42 that this fixed side end thrust face 31C and movable side shaft are supplied with between thrust face 32C, in refrigeration agent sucks pressing chamber 30A, supply with to fixed side vane member 31A and movable lateral lobe sheet element 32A.

As mentioned above, to form iron be hard films 100 owing to apply iron plating on the movable side turbine 32 for the turbocompressor of low vibration on the principle, so can carry out the running under low friction, high wearing and tearing and dried state, and further utilize the lubricant oil 42 that is adsorbed on the movable lateral lobe sheet element 32A to guarantee the sealing of pressing chamber 30A, the leakage in the transition operation that often becomes not enough because of lubricant oil 42 startup etc. can also be reduced, the performance of compressor can be improved.In addition, with the engagement groove of the protrusions snap of partition ring 35 in, even but also high-speed starting under the transition operation of startup that lubricant oil 42 becomes not enough etc., effect at solid lubricant, its result can improve acceleration performance.

In addition, in the above-described embodiments, on movable side turbine 32, iron plating is being set, even and on fixed side turbine 31 and partition ring 35, iron plating is set and also can obtains same effect and effect.In addition, even be that hard films 100 adopts the iron spraying platings also can obtain same effect and effect as iron.In addition, the melt processing layer also can obtain same effect and effect promptly to use laser to form again, adopting the occasion of laser, the surface more porosity that becomes, so can expect high guarantor's oiliness, lower friction and high abrasion.In addition, as solid lubricant, can enumerate MoS2, WS2, graphite etc.

Fig. 2, example shown in Figure 3 are examples of rotary compressor occasion.Compression mechanical part 50 as shown in Figure 2 is accommodated in the container 10 with the same motor part 20 of Fig. 1 occasion, and the suction pipe 11 of container 10 and discharge tube 12 are formed by connecting with outer loop and are closed state, constitute compressor easy to maintenance.In addition, for putting on identical symbol with the common member of occasion shown in Figure 1 etc. and the repetitive description thereof will be omitted.

The piston 52 that compression mechanical part 50 has clutch release slave cylinder 51, rotate in clutch release slave cylinder 51, as shown in Figure 3 will by clutch release slave cylinder 51 become compression volume 50A with piston 52 formed apart and suck space 50B blade 53, seal the metal (upper member 54 and 55 shown in Figure 2 of the both ends of the surface of clutch release slave cylinder 51 and piston 52, driving force passed to the bent axle 56 of piston 52.

As shown in Figure 3, in clutch release slave cylinder 51, be provided with the blade groove 51A that blade 53 is housed, inlet hole 51B, the tap hole 51C of discharging refrigerant that sucks refrigeration agent.Blade 53 utilizes to be configured in the elastomer 53A at back and to be urged all the time to piston 52 sides as shown in Figure 3.Bent axle 56 as Fig. 2, shown in Figure 3, has crank portion 56A, and piston 52 is set at the periphery of this crank portion 56A.

On upper bearing element 54, be provided with the exhaust port that is communicated with not shown tap hole 51C.In the bottom of container 10, store oiling agent 42, the not shown lubricant pump that this oiling agent 42 utilizes head pressure or is located at the underpart of bent axle 56 is up inhaled and even is utilized head pressure to be supplied to the slide part of compression mechanical part 50.

Upper bearing element 54 and lower bearing member 55 under the state that piston 52 is loaded in the clutch release slave cylinder 51, sandwich clutch release slave cylinder 51 and to utilize bolt etc. fixing and it is sealed from two ends up and down.

In the less rotary compressor simple in structure of such part number, the piston 52 that the 1 group of member that slides over each other comprises clutch release slave cylinder 51, rotate in this clutch release slave cylinder 51, will become the blade 53 of clutch release slave cylinder 51 sides of compression volume 50A and suction space 50B by the apart that this clutch release slave cylinder 51 and piston 52 form, metal (upper member 54 and 55 that the both ends of the surface of clutch release slave cylinder 51 and piston 52 are sealed, driving force passed to the bent axle 56 of described piston 52, piston 52 usefulness aluminum alloys form, and the illustrated described iron of formation is hard films 100 on this piston 52.Like this, cause only is shaped as the aluminium alloy element that iron is hard films 100 with one of piston 52, so at the clutch release slave cylinder 51 that slides over each other with this piston 52, blade 53, metal (upper member 54 and 55 and and bent axle 56 between all slide parts in, can realize utilizing described iron is the sliding motion structure of dissimilar metal between mutually of hard films, guarantee high lubricity, wear resistance and sealing, and can improve the fatigue strength of piston 52, and, correspondingly can obtain simultaneously miniaturization for the balances of piston 52 eccentric rotations with the lightweight of the piston that obtains eccentric rotation, lightweight.

In this example, especially form clutch release slave cylinder 51 and the piston 52 that constitutes compression mechanical part 50 with aluminum alloy.Also can use agglomerated material as aluminum alloy.For piston 52 is that to apply as iron be that the iron plating of hard films 100 and the slide part that makes with the clutch release slave cylinder 51 of identical aluminium alloy element are the structure of dissimilar metal.The surface of this iron plating with solid lubricant by shot peening, moment be melted on the surface portion of iron plating of cooling and form solid lubricant by the layer of melt processing again after disperseing.Preferably, the thickness of iron plating is 5-100 μ m, the thickness of melt processing layer is that 2-30m, surface roughness Rmax are below the 8 μ m again.This iron plating is formed on the outer circumferential face of piston 52.

Along with bent axle 56 utilizes the rotation of motor part 20, piston 52 is made eccentric rotary in clutch release slave cylinder 51.Piston 52 is with the state of maintenance with blade 53 butts, and the direction of arrow to Fig. 3 in clutch release slave cylinder 51 is rotated.Along with this rotation, suck space 50B, during being in connected state, inlet hole 51B proceeds the suction of refrigeration agent.And piston 52 and contact position clutch release slave cylinder 51 finish the suction of refrigeration agent by inlet hole 51B the time.Then, as compression volume 50A compressed refrigerant.The contact position with clutch release slave cylinder 51 of piston 52 approaches tap hole 51C, is compressed into moment of authorized pressure at refrigeration agent, and the refrigeration agent in the compression volume 50A is discharged in the container 10 from tap hole 51C.

On the other hand, the lubricant oil 42 that is positioned at the bottom of container 10 utilizes along with the action of the lubricant pump of the rotation of bent axle 56 up to be inhaled, by be located on the bent axle 56 the fuel feeding road and up and down the slip surface of bearing components 54,55 and piston 52 supply with.To the lubricant oil 42 of compression volume 50A and suction space 50B supply, in refrigeration agent is discharged to container 10.

Like this, compare with turbocompressor, in the part number is few and price the is low rotary compressor, owing on outer circumferential face, form iron plating as the piston 52 of aluminium alloy element, so can under low friction, high abrasion and dried state, turn round, because piston 52 usefulness aluminum alloys and become further that light weight makes and its eccentric counterweight miniaturization, lightweight of rotating on the corresponding rotor 22, its result, but just can carry out the more running expansion capability control range of high speed.

In addition, in described embodiment, only on the outer circumferential face of piston 52, iron plating is set, even and iron is set on whole surface is hard films 100, also can obtain to comprise with clutch release slave cylinder 51 beyond the identical effect and the effect of slide part of member, be effective to the fatigue strength that improves piston 52.In addition, be hard films 100 as iron, even use the iron spraying plating also can obtain identical effect and effect.In addition, even use laser to form melt processing layer again, also can obtain identical effect and effect.Can expect to obtain high guarantor's oiliness, lower friction and high abrasion and make the surface become porosity with laser.In addition, can enumerate MoS2, WS2, graphite etc. as solid lubricant.

Fig. 4, example shown in Figure 5 are examples of opening impeller type rotary compressor occasion, and as shown in the figure, compression mechanical part 60 comprises clutch release slave cylinder 57, rotor 58, blade 59, anterior side plate 61a, rear portion side plate 61, live axle 62.Clutch release slave cylinder 57 is formed the tubular that inner peripheral surface is made sliding contact surface.These clutch release slave cylinder 57 usefulness bolt are between anterior side plate 61a and rear portion side plate 61.

The two ends of live axle 62 utilize the bearing 63 of anterior side plate 61a and the bearing 63A of rear portion side plate 61 being supported.Columned rotor 58 is installed on the intermediate portion of this live axle 62.On rotor 58, be formed with blade groove 64, in blade groove 64, holding impeller 59 sliding freely.The oil pressure of the lubricant oil 42 that utilization is supplied with to back pressure chamber 65, blade 59 are to from the outstanding direction application of force of blade groove 64.And the front end of blade 59 with inner peripheral surface sliding contact, one side and rotor 58 rotations of clutch release slave cylinder 57, forms suction chamber 66 and pressing chamber 67 on one side between adjacent vanes 59.Suction chamber 66 is communicated with suction port 68 in being located at clutch release slave cylinder 57, and pressing chamber 67 is communicated with exhaust port 69 in the clutch release slave cylinder 57.

In this example, clutch release slave cylinder 57, anterior side plate 60, rear portion side plate 61 and blade 59 are made aluminum alloy.Also can use agglomerated material as aluminum alloy.In the interior week of clutch release slave cylinder 57,, be that hard films 100 applies iron plating as iron as represented among the figure with solid line.The surface of this iron plating is carried out shot peening with solid lubricant, is forming oiling agent on the top layer of the cooled iron plating of fusion by the layer of melt processing again after disperseing to moment.Preferably, the thickness of iron plating is 5-100 μ m, the thickness of melt processing layer is that 2-30 μ m, surface roughness Rmax are below the 8 μ m again.This iron plating is formed on the inner peripheral surface of clutch release slave cylinder 57.

The rotary compressor that this is routine for example makes rotor 58 rotations for live axle 62 transmission of power from motor by driving belt.The centrifugal force that utilization produces because of this rotation and the oil pressure of back pressure chamber 65 make blade 59 outstanding from blade groove 64, the front end of blade 59 on one side with the inner peripheral surface sliding contact of clutch release slave cylinder 57, on one side and rotor 58 rotations.Along with the rotation of rotor 58, refrigeration agent is sucked into suction chamber 66 from suction port 68, then, in pressing chamber 67, compress, discharge to the outside through exhaust port 69, rear casing 61b.On the other hand, the part of lubricant oil 42 is supplied to clutch release slave cylinder 57, carries out the lubricated of crack and clutch release slave cylinder 57 inner peripheral surfaces between anterior side plate 60, rear portion side plate 61 and the rotor 58.

As mentioned above,, can under low friction, high abrasion and dried state, turn round, uprise because modulus of longitudinal elasticity further becomes big fatigue strength owing on the inner peripheral surface of clutch release slave cylinder 57, form iron plating.Its result, with only for the situation of aluminum alloy mutually specific energy under higher load, turn round, can further increase the maximum load that can turn round.Therefore, iron be hard films 100 shown in imaginary line among the figure, be located at the inner and outer circumferential surfaces both sides or all on the face, can improve fatigue strength.As long as electroplating operations on whole faces is just passable with simple impregnation method.

In addition, in the above-described embodiments, be provided with iron plating, but be hard films,, also can obtain identical effect and effect even use the iron spraying plating as iron.In addition, promptly use laser to form melt processing layer again, also can obtain same effect and effect.And on surface, become porosity, so can expect high guarantor's oiliness, low friction and high abrasion with laser beam machining.In addition, can enumerate MoS2, WS2, graphite etc. as solid lubricant.

Example shown in Figure 6 is an example that utilizes the shuttle Linearkompressor occasion of linear motor.As shown in the figure, in container 10, accommodate clutch release slave cylinder 71, piston 72, linear motor 73, spring mechanism portion 83.It is the state that seals that container 10 utilizes suction pipe 11 and discharge tube 12 to be formed by connecting with outer loop.

Linear motor 73 is by being embedded in stator 75 in the outer yoke 74, being configured in the magnet 77 that keeps that is fixed on the interior yoke 76 of the inboard of facing mutually with stator 75 and being constituted.Clutch release slave cylinder 71 has clutch release slave cylinder hole 71A and the lip part 71B that piston 72 is supported chimericly, yoke 74 outside connecting on lip part 71B.

On the other hand, piston 72 has along with the advance and retreat of himself suction valve 78 that keeps, yoke 76 in connecting with opening and closing on the lip part 72B of rear end on the opening portion 72A of its forward end.In addition, interior yoke 76 is supported on the periphery of clutch release slave cylinder 71 slidably, is fixing magnet 77 as described above like that.In addition, piston 72 has the inlet hole 79 that is used to import refrigeration agent.The front face side of clutch release slave cylinder 71 is discharged from valve-supporting body 80 and closes, and the front-end face of piston 72 between be formed with pressing chamber 81.In addition, the central part in expulsion valve supporting mass 80 is holding expulsion valve (not shown).In addition, expulsion valve supporting mass 80 is connected with spiral helicine discharge tube 12 by the baffler 82 that forms the anechoic chamber.

Fixing the resonant spring 84 of spring mechanism portion 83 outside on the rear end side of yoke 74 and piston 72.This resonant spring 84 is maintained on the container 10 by support spring 85.In addition, the support spring 85A that keeps on the front side of container 10 is keeping baffler 82.In the bottom of container 10, lubricant oil 42 is kept in storage.

In this example, form clutch release slave cylinder 71 and piston 72 with aluminum alloy.Also can use agglomerated material as aluminum alloy.On the outer circumferential face of piston 72, be that hard films 100 applies iron plating as iron.On the surface of this iron plating with solid lubricant by shot peening, on the skin section of the iron plating of moment ground fusion cooling, form the dispersed melt processing again of solid lubricant layer.Preferably, the thickness of iron plating is 5-100 μ m, the thickness of melt processing layer is that 2-30 μ m, surface roughness Rmax are below the 8 μ m again.

By in energising on the stator 75 of linear motor 73 and and magnet 77 between have foucault current to flow.Its result, piston 72 moves (promptly drawing back) to the opposite direction with discharge tube 12 sides.Therefore, the refrigeration agent that imports from inlet hole 79 makes suction valve 72A open, and is inhaled in the pressing chamber 81.In addition, utilize retreat resonant spring 84 and the support spring 85 of piston 72 to be pressed and to put aside energy.

Under this state, when stopping the energising of stator 75, emit the energy of being put aside in resonant spring 84 grades, piston 72 moves (promptly marching forward) to the direction of discharge tube 12.Thus, suction valve 78 cuts out, and the refrigeration agent in the pressing chamber 81 is compressed.And the refrigeration agent after the compression is pushed the expulsion valve of the central part that is located at expulsion valve supporting mass 80 open, discharges in baffler 82 and noise reduction, and is mobile and supply with to outer loop spiral helicine discharge tube 12 in.On the other hand, lubricant oil 42 utilizes the stirring action of resonant spring 84 and support spring 85 and disperses and be delivered to the clutch release slave cylinder 71 in compression mechanical part 70 and the slide part of piston 72 with refrigeration agent, lubricated slide part.

As mentioned above, owing to holding compression mechanical part 70, in small-sized Linearkompressor, on piston 72, form iron plating, in the inside of linear motor 73 so can under low friction, high abrasion and dried state, turn round.In addition, owing to the piston 72 that can prevent when starting or when stopping to produce contacts wearing and tearing or the burn that causes with the single face of clutch release slave cylinder 71,, save lubricant oil so can reduce essential lubricants capacity.

In addition, among the described embodiment, only on the outer circumferential face of piston 72, be provided with iron plating, even and iron plating is set on whole surface, also can obtain same effect and effect, be effectively to improving fatigue strength, electroplating operations is just passable with simple impregnation method.In addition, be hard films as iron, even adopt the iron spraying plating, also can obtain same effect and effect.In addition, promptly use laser to form melt processing layer again, also can obtain same effect and effect.And the surface after the employing laser beam machining forms porosity, can expect high guarantor's oiliness, further low friction and high abrasion.In addition, as solid lubricant, can enumerate MoS2, WS2, graphite etc.

By above explanation as can be known, adopt the described invention of claim 1, owing to use not chloride alternative refrigerant or CO2, so can not damage the ozone layer.In addition, owing to use the lubricant oil mix with it, so except lubricating of himself providing was provided, that can carry out also that refrigerant conveying causes lubricated.Especially, the at least 1 group member that slides over each other and contact with refrigeration agent is constituted with aluminum alloy, except the lightweight that can obtain to be directly proportional with the aluminium alloy element number, on at least 1 slip surface of aluminium alloy element, can guarantee by not resembling the low coefficient of frictionization that hard produced that crisp stable iron the alumite is hard films and because of the high-lubricity that oily adsorptivity produced of excellence, owing to can improve wear resistance chronically at the slide part of facing this slip surface, and described iron is the fatigue strength that hard films also improves aluminium alloy element chronically, so can obtain long lifetime.

Adopting the described invention of claim 2, is on the basis of the described invention of claim 1, also owing to be on the surface of hard films melt processing layer again to be set at iron, so can further improve wear resistance.

Adopting the described invention of claim 3, is on the basis of the described invention of claim 2, because also on the melt processing layer solid lubricant being disperseed again, so can do running.

Adopt claim 4 or 5 described inventions, be in the described invention of claim 1-3 on each the basis, also owing to fixed side turbine and movable side turbine at the 1 group of member that makes turbocompressor, or/and the both sides in the group of the member of movable side turbine and rotation constraint means make aluminium alloy element and more lightweight, and be that hard films realizes the sliding motion structure between the dissimilar metal by only on the slip surface of one side, forming described iron, so can avoid being easy to generate bonding problem during lack of lubrication between mutually in same material, even also can high-speed starting in the transition operation when the startup of lubricant oil deficiency, its result can improve acceleration performance.

Adopt the described invention of claim 6, be in the described invention of claim 1-3 on each the basis, also only that the part number is few, a piston in the rotary compressor simple in structure adopts and forms iron is the aluminum alloy of hard films, at this piston and the clutch release slave cylinder that slides over each other, blade, the metal (upper member and and bent axle between whole slide part on, can realize the structure that dissimilar metal slides over each other, guarantee that described iron is high-lubricity and the wear resistance that hard films produces, and can improve the fatigue strength of piston, and, obtain the lightweight of the piston of eccentric rotation, correspondingly can obtain the miniaturization of the counterweight of the eccentric rotation of relative piston simultaneously, lightweight, its result can turn round with higher speed, but expansion capability control range.

Adopt the described invention of claim 7, not eccentric rotation utilizes to the rotor in the rotary compressor of part number impeller type few and simple in structure, on one side other members are made aluminium alloy element and can obtain significantly lightweight, only iron being set on the slip surface of clutch release slave cylinder on one side is hard films, the clutch release slave cylinder that slides sharp and rotor and and blade between guarantee by iron to be high-lubricity, wear resistance and the sealing of hard films generation, and can improve fatigue strength, and can further increase the maximum load that can turn round as the clutch release slave cylinder of pressurized container.

Adopt the described invention of claim 8, be in the described invention of claim 1-3 on each the basis, also make both sides obtain lightweight owing on one side the clutch release slave cylinder of Linearkompressor and piston are made aluminium alloy element, to occasion at shuttle compressor, usually when starting and the piston in when stopping contact with the single face of clutch release slave cylinder to become easily and weares and teares or burn the former thereby situation of more lubricants capacity is set, utilization is that hard films can obtain high lubricity at least one square iron that becomes of piston and clutch release slave cylinder, wear resistance and sealing, thus can will be used to start the time and the essential lubricants capacity when stopping to be suppressed to less.And, be hard films and when improving fatigue strength, can further increase the maximum load that can turn round when form iron in the clutch release slave cylinder side that becomes pressurized container.

Claims

1. a compressor uses HFC series coolant, HC series coolant or CO2 as refrigeration agent; Use ester oil, ether oil, PAG oil, carbonic acid ester oil, alkane benzene oil, naphthene series mineral oil or paraffin series mineral oil lubricant oil as compression mechanical part, it is characterized in that, in the 1 group of member that slides over each other of compression mechanical part at least one formed by aluminum alloy, and forming iron on the slip surface of at least one member that is made of aluminum alloy is hard films.

2. compressor as claimed in claim 1 is characterized in that, at described iron is to be provided with melt processing layer again on the surface of hard films.

3. compressor as claimed in claim 2 is characterized in that, is dispersed with solid lubricant on the described layer of melt processing again.

4. as each described compressor among the claim 1-3, it is characterized in that 1 group of member in turbocompressor, is fixed side turbine and the movable side turbine that forms pressing chamber between mutually, both sides are formed by aluminum alloy.

5. as each described compressor among the claim 1-3, it is characterized in that 1 group of member is in turbocompressor, be and the fixed side turbine between form the movable side turbine of pressing chamber and the member of the rotation restraint device of circular orbit motion carried out in its constraint rotation, both sides are formed by aluminum alloy.

6. as each described compressor among the claim 1-3, it is characterized in that, 1 group of member be the clutch release slave cylinder in the rotary compressor, the piston that in this clutch release slave cylinder, rotates, will by the formed apart of this clutch release slave cylinder and piston become compression volume and suck the blade of the clutch release slave cylinder side in space, metal (upper member that the both ends of the surface of clutch release slave cylinder and piston are sealed, bent axle that driving force is transmitted to described piston, piston is formed by aluminum alloy, and forming described iron on this piston is hard films.

7. as each described compressor among the claim 1-3, it is characterized in that, 1 group of member, be the clutch release slave cylinder in the rotary compressor of impeller type, the rotor that is provided in this clutch release slave cylinder inside, axle this rotor of supporting and the anterior side plate that the rear and front end of described clutch release slave cylinder is sealed and rear portion side plate, be contained in the blade that is formed in the described epitrochanterian blade groove sliding freely, described clutch release slave cylinder, anterior side plate, rear portion side plate and blade are formed by aluminum alloy, and forming described iron on clutch release slave cylinder is hard films.

8. as each described compressor among the claim 1-3, it is characterized in that, 1 group of member is the clutch release slave cylinder in the Linearkompressor, the piston that is supported sliding freely along its axial direction in this clutch release slave cylinder, this clutch release slave cylinder and piston are formed by aluminum alloy, and forming iron on its at least one side is hard films.