CN1036021C - Closed type electromotive compressor - Google Patents
Closed type electromotive compressor Download PDFInfo
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- CN1036021C CN1036021C CN93119077A CN93119077A CN1036021C CN 1036021 C CN1036021 C CN 1036021C CN 93119077 A CN93119077 A CN 93119077A CN 93119077 A CN93119077 A CN 93119077A CN 1036021 C CN1036021 C CN 1036021C
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
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Abstract
To realize a closed type compressor of high reliability without seizure generated at a bearing part even with substitute fleon gas used as refrigerant in this closed type compressor of such structure that the main journal bearing part of a crankshaft is supported in the cantilever state from a frame having a sliding bearing part. In the structure of a closed type compressor, at least one of a main journal part 6b of a crankshaft 6 and the sliding bearing part 7a of a frame 7 is provided with a taper part 18, for instance, corresponding to the inclination of the crankshaft 6 in a clearance so that the contact part of a compressor mechanism part side concentrated load part between the crankshaft main journal part 6b and the frame sliding bearing part 7a is of such shape as to be in surface contact through an oil film. This structure prevents the rupture of the oil film causing the direct metal contact between the crankshaft and the frame which leads to wear and seizure, and enables cost reduction by omitting surface treatment heretofore in need and the improvement of reliability of a refrigerating air-conditioning system or the like using substitute fleon.
Description
The present invention relates to a kind of enclosed motor compressor, particularly be included in as the enclosed motor compressor in air regulator or the refrigerator, this compressor comprises piston or the bent axle that connects with off-centre, this refrigerator uses the not refrigerant replacement chlorofluorocarbon of chloride atom, because its use is restricted.Or rather, the present invention relates to a kind of hermetic motor compressor, for example, the closed type electromotive compressor of dog link type, for it, the lubrication property of the to-and-fro motion part between piston and the cylinder or the supporting bearing part of crankshaft main journal can improve, and wear resistance also can be improved.
Recently, the problem that the problem that environment is destroyed, particularly ozonosphere are destroyed has appearred in the whole world.Therefore, the use of the chlorine type refrigerant that damages the ozone layer is restricted, and the dichloro fluomethane (hereinafter referred to as " R12 ") that uses in the refrigeration cycle of the refrigerating device as refrigerating machine as refrigerant is exactly the example of chlorine type refrigerant.As a kind of alternative refrigerant, the refrigerant of novelty that meets chlorofluorocarbon regulation is developed.Recently, do not damage the ozone layer 1,1,1,2-HFC-134a (hereinafter referred to as " R134a ") is used.Yet, to compare with traditional refrigerant R12, the characteristic of above-mentioned new refrigerant must be improved.
When using new refrigerant and use to be adapted to the cooling machine oil of new refrigerant, the variation of lubrication property can take place, the new oil supply structure that can compensate the lubrication property deterioration designs.
At first, be described in conjunction with Figure 19 to 22 pair of common dog link type closed type electromotive compressor.Figure 19 is the sectional arrangement drawing of common closed type electromotive compressor.Figure 20 is described in a part plan sectional view of piston and cylinder portion in the compression process arbitrarily.Figure 21 describes the side pressure position curve figure that acts on the piston guide part in the compression process.Figure 22 describes piston is in heeling condition with respect to state shown in Figure 20 sectional drawing.
In general, shell as shown in figure 19, closed type electromotive compressor has structure shown in Figure 19, it have one the sealing shell 1, motor part 2 is equipped with in its bottom, compression set is equipped with on top, and closed type electromotive compressor flexibly is bearing in the closed casing 1 by spring 17.Motor part 2 has stator 4 and rotor 5, and rotor 5 is connected with the bent axle 6 of rotation, and bent axle 6 has eccentric part 6a (hereinafter referred to as " bent plate pin "), and when its axis normal was provided with, bent axle 6 shrink fit were contained in the rotor.
The a part of cold oil that is sprayed onto cylinder 9 downwards flows and arrives the formed chamfered part 9b of entrance that cylinder 9 inserts pistons 10 along the outer surface 9a of cylinder 9.This part above-mentioned cold oil and that part of oil that is sprayed onto outer surface of piston 10a downwards together because the pressure reduction that in suction process, between cylinder 9 inner and outer portions, produces and flow to the targeting part of piston 10 by the gap between the sliding parts.Then, wetting effect makes oil form oil film on the opposite inner face 9a of cylinder g, and the oil that consequently offers sliding parts and lubricated sliding parts has been recycled.On the other hand, the oil that is sprayed onto valve plate 11 outer surfaces and outlet valve 12 outer surfaces downwards flow back in the oil sump that is contained in the bottom along outer wall, thereby has carried out heat exchange.Japanese patent publication No.2-59309 has described the reciprocal compressor of the above-mentioned type.
The conventional art that constitutes is fed to the gap that forms between cylinder and the piston to the oil that is used to lubricate like this, and the supply of lubricant oil is realized by the pressure reduction that produces between the inside and outside portion of suction process cylinder.The possibility that oil enters into the piston guide part is directly proportional with the size in gap.Yet if the compression ratio height, if just the pressure reduction between exhaust pressure and the pressure of inspiration(Pi) is big, when compression stroke, pressurized gas sprays by the gap, causes that volumetric efficiency reduces.Moreover oil turns back to and inserts the entrance that piston passed through, thereby has stoped the formation of lubricant film on the piston guide part.
Form by the oil supplying device of independent setting and to force fuel feeding to think feasible.In fact caused to increase inevitably the quantity of structural element.Therefore, because component costs and the required cost of these parts of assembling can not reduce, just produced the irreducible problem of processing cost.Though disclose another kind of conventional art in Japanese patent publication No.61-14358, disclosed structure can not suck the lubricant oil of the atomizing of splashing from compressor section, therefore, also there is similar problem.
Each above-mentioned conventional construction all causes the less amount of lubrication oil of returning from the external refrigeration circulation to enter cylinder by suction pipe.Yet above-mentioned amount is not enough for the gap between lubricated cylinder and the piston.Another problem of Chu Xianing is that returning of lubricant oil is irregular in these cases.
In order to overcome the problems referred to above, a kind of technology is disclosed in Japanese unexamined model utility announcement No.61-212677, wherein an end of V-type groove links to each other with the oil sump hole, and the other end links to each other with air intake passage.Yet above-mentioned structure can not be provided to space between cylinder and the piston to the lubricant oil of q.s.What is worse, must finish to forming the auxilliary operation that adds of oil sump etc.
In traditional closed type electromotive compressor as shown in figure 19, the gap between the internal surface 9a of cylinder 9 and the outer surface 10a of piston (hereinafter referred to as " sideshake ") maintains very little size, to reduce the leakage that is produced by compression pressure, causes and improves performance.This sideshake must enough have the oil film of the refrigerant R12 of good lubrication performance and the lubricating oil of R12 compatibility (for example, paraffin wax type mineral oil) greatly with formation.
To narrate the compression stroke that cylinder 9 and piston 10 are finished in the dog link type closed type electromotive compressor below.
As shown in figure 20, crank pin 6a rotates with turning radius R around rotating center O.At this moment, piston 10 to-and-fro motion suction and pressurized gas in cylinder 9.In compression process, on piston 10, produce a moment by represented gas pressure distribution X of arrow and the power Y that affacts on the piston 10 with crank pin 6a, the side pressure that this moment produces on piston concentrates on 2 points, and they are entrance W that guiding point Z on the piston 10 and piston enter cylinder 9.The crank angle is depended in the variation of side pressure, and so as shown in figure 21, before outlet valve was opened, side pressure was raised to maximum value immediately.
On the other hand, the sideshake that exists between piston 10 and the cylinder 9 produces above-mentioned action effect causes piston 10 to tilt in sideshake, as shown in figure 22.As a result, contact has appearred on two points a little, Here it is the targeting part 10c of piston 10 and the intake section 9b that piston enters cylinder 9.Like this, side pressure concentrates on above-mentioned 2.
Therefore, the side pressure of the piston 10 in the dog link type compressor is born by two above-mentioned points, causes that the surface pressure of above-mentioned part excessively raises.Particularly, the hot gas heating that the targeting part 10c of piston 10 is heated by compression reduces oil viscosity.Therefore, You bearing capacity sharply descends.
Therefore, if in order to eliminate afore mentioned rules at chlorofluorocarbon, it is suitable using R134a to replace R12 at the closed type electromotive compressor of the above-mentioned type, the fact that R134a does not contain the chlorine atom cause ferric chloride not resemble to be narrated usually with excellent wear form.So lubrication property has worsened, in addition, produced a problem, the reliability that is exactly sliding parts sharply worsens.Especially, it is that surface pressure is too high that dog link type compressor encounters problems, and oil film destroys easily.The targeting part of piston, particularly piston sharply weares and teares.
Therefore, the model utility of Japan's examination announces that No.63-25341 has the compressor of a rotating sloping disk type, its piston targeting part have an inclination angle be about 45 ° tiltedly and, and the outer surface from this inclined-plane to piston is tapered, the cone angle of appropriateness is 3 ° to 5 °, and chamfered portion and tapering part are progressive forming.Have, outer surface, tapering part and chamfered portion are coated with fluororesin again.
Yet above-mentioned conventional art is to handle like this, and said structure is the setting because the shock surface between piston and the cylinder comes off in order to prevent the outer surface of piston coating, and impact produces when connecting piston and cylinder each other.Therefore, this structure can not help to improve the some contact sliding mode that is occurred in the piston guide part during the compression process of dog link type compressor.
The model utility of Japanese unexamined announces that No.64-39485 discloses a kind of technology, has wherein formed many oil grooves in the skirt section of piston, and every oil groove all has the transverse section of waveform.Because many oil grooves, above-mentioned technology can be improved the sliding properties between piston and the cylinder surfaces.Yet big sideshake has worsened the sealing of air, causes excessive leakage is taken place by compression.Therefore, volumetric efficiency has reduced, so, produced the worry that cooling power may reduce.Moreover above-mentioned disclosed technology can not be improved the some contact of piston guide part and slide.
Owing to fluid compression and act on the load that produces on the piston and born by means of bent axle by the bearing part of bearing, like this, a kind of typical hermetic motor compressor also runs into above-mentioned problem.Here it is makes a kind of typical hermetic motor compressor of bearing part integration use cantilever structure so that simplified structure in order to reduce overall dimensions.Above-mentioned compressor mainly uses integral ring-shaped bearing, causes the bearing part of crank spindle neck portion and bearing all cylindrical, and enough big gap is arranged between them.Hermetic motor compressor with cantilever structure bearing discloses in Japan uncensored patent announcement No.4-110277.
Because the structure of above-mentioned hermetic motor compressor makes the direction that acts on the compressive load on the piston inconsistent with the direction that acts on the bearing sliding bearing part, load can not all be born by the bearing sliding bearing.Further, sliding bearing need have the gap and causes on two ends of bent axle and sliding bearing with EDGE CONTACT.So, load occurred and concentrated the eccentric contact condition that bears by two points.At this moment, for trimming moment, maximum load is created in the end points adjacent with compressor section, and piston is arranged in compressor, and except having produced maximum load, the other factor that produces above-mentioned some contact at the edge is the formation that has stoped oil film.Therefore, the surface pressure of this part sharply raises, and the result abrades sliding parts, the problem that occurs blocking.
As the measure that overcomes the problems referred to above, the lengthening sliding parts is with the load on the minimizing effect bearing, and bent axle carried out wearing face handle to guarantee reliability.Yet sliding parts can not extend arbitrarily, even extended, the load that acts on the sliding bearing part of bearing can be less than the compressive load on the piston yet.Carry out the surface-treated measure and can not prevent Metal Contact between the sliding bearing part of crankshaft main journal and bearing.So lubricating status is in the Boundary lubrication state, the slippage loss of bearing has been increased.
Japanese patent publication No.3-233181 discloses another kind of method, wherein also assists in the lower end of bent axle to have added a bearing.Announce that in Japanese Utility Model No.53-9930 discloses another method, for bearing being installed so that similarly support this axle in the every end that is tilted in piston that stops axle.Yet said method makes and the complicated and size increasing of compressing mechanism has produced the problem that cost obviously improves.
The refrigerant that contains the chlorofluorocarbon of chlorine as alternative tradition can not form ferric chloride, and ferric chloride presents good wear resistance and stop the character of blocking.Therefore, the fact of sliding parts reliability control breakdown is suggested.In the situation of the bent axle main journal adjacent with compressing mechanism and very high for above-mentioned surface pressure, oil film is difficult for situation about forming for load concentration, and crankshaft wear and the measure of blocking from being not effective to common preventing of taking.
The present invention proposes for the problems referred to above that overcome conventional art and be subjected to, therefore, the purpose of this invention is to provide and a kind ofly be suitable for using substitute refrigerants to satisfy the closed type electromotive compressor of the regulation that bans use of the chlorofluorocarbon regulations, gap between cylinder and the piston can be reduced to very little degree with prevent volumetric efficiency and degenerate and can be between piston and cylinder reliably and effectively fuel feeding and oiling agent, it is easy to process and assemble and is there is no need obviously to show efficient that still can keep good under the situation that changes conventional construction and the reliability of being satisfied with.It can reduce the local surface pressure that causes owing to the some contact in piston guide contact segment partly, contact segment between crankshaft main journal and bearing sliding bearing can effectively form oil film, thereby avoided making the slippage loss of the sliding parts of the sliding parts of piston or crankshaft main journal, improved wear resistance, also do not prevented abnormal wearing and tearing and stuck even do not carry out surface treatment like this.
To achieve these goals, comprise according to closed type electromotive compressor provided by the present invention:
The closed casing that holds cooling machine oil;
Be contained in the motor in the closed casing, the axle of its running shaft becomes vertical and is provided with:
Include the compressor section of piston and cylinder, the upper end of piston and motor links to each other when inserting with the integrally formed bent axle of running shaft, piston is to-and-fro motion in cylinder, compressor section is with the centralized system bearing load, this load is produced by compression work to be finished in the compression stroke, this loading in a side of piston guide part and cylinder with the relative inlet part of piston guide part one side;
Above-mentioned running shaft comprises oil duct, and oil duct is shaped with boring on its axial direction, and the main journal of this end bearing bent axle partly rotates towards the sliding bearing of bearing, and its lower end is as open part and immerse in the cold oil;
Make the part of compressor section and/or running shaft bear the surperficial contact device of the load that becomes the surface contact in a concentrated manner;
Guide the oil-guide device of a part of cooling machine oil, cold oil moves upward by above-mentioned oil duct along with the rotation of running shaft and is sprayed onto the surperficial contact device to compressor section from the running shaft top.
The device that a part of cooling machine oil is inducted in the cylinder is an oil duct, and this oil duct is communicated with the suction port that forms on the exhaust valve plate of compressor section and valve plate outer peripheral portion between dividing, and the cross-section area of oil duct is 0.3～2% of a suction port cross-section area.
In pressing the enclosed motor compressor of above-mentioned formation, the oil that sprays from the bent axle top continues to be sprayed onto the outer surface of exhaustion plate or valve plate downwards, and along this flow downwards, thereby enter into the oil duct that exhaust valve plate or valve plate outer surface and suction port form between the two.This oil duct is for having formed connection between the two.The pressure of suction port opening end is lower than the pressure of intake section one end in the outer periphery in the oil duct, and this is owing to the gas that flows into cylinder when induction stroke is determining by the flow velocity behind the suction port.Therefore, the gas of oil in the oil duct and suction enters cylinder with the form of atomizing together.Oil as above-mentioned suction cylinder forms oil film on cylinder inner wall, oil can enter the targeting part of piston at an easy rate when compression process.So, realized fuel feeding and lubricated.
Closed type electromotive compressor according to the present invention is included in the device that keeps oil film in the gap between cylinder and the piston.
The device that keeps oil film between cylinder and piston is to lean against the local a kind of shape that forms of piston guide part to finish, and the targeting part with piston of this shape is that face contacts with cylinder in that oil film maximum load point place is arranged each other.More particularly, the shape that realizes the surface contact is to form with continuous curved surface track in the piston guide part, this curved surface has a plane of inclination, and to alleviate in each the locational interference in cylinder surfaces of cylinder-bore axis direction upper piston, the inclination with the curved surface of plane of inclination and piston is consistent.
For the scratch of piston guide part in the compressor that prevents to use the refrigerant that substitutes chlorofluorocarbon, piston guide is partly made above-mentioned shape obtaining the surface contact, and does not use no oily metal or similar metal manufacturing piston.
As the device that keeps oil film, can drive oil groove at the outer surface of piston, the oil groove fuel feeding, oil can enter into the outer surface of piston from the chamfered part that cylinder inserts the ingress of piston, arrives sliding position.Oil groove has an end approximately to become 90 ° facing to the end face of piston and with the axis of piston, and oil groove also has the part of making inclined surface near the end face of piston.
In the closed type electromotive compressor according to above-mentioned formation according to the present invention, the internal surface of the targeting part of piston and cylinder is that the surface contacts when lubricant oil.Therefore, can prevent that side pressure from concentrating on the point, and can reduce surface pressure greatly.Therefore, because surface pressure can not cause that cylinder directly contacts with piston metal each other, can prevent the destruction of oil film, thereby prevent wearing and tearing.
Because the intake section of cylinder is not directly heated by the pressurized gas of heat, the temperature at above-mentioned position can remain on low-level on.Even oil body is higher, surface pressure is also bigger, and oil film also can be kept an effective anti-cripping load.Therefore, can avoid occurring cylinder entry abrasion problem.
In closed type electromotive compressor according to the present invention, crankshaft main journal and with finish near realizing that the surface contacts by being processed into a kind of shape between the bearing sliding bearing of compressor section load concentration, for example, taper shape, this taper shape is consistent with the inclination in the gap of bent axle between main journal and/or sliding bearing.
Because said structure, the contact between the bearing sliding bearing that is close to compressor section of crankshaft main journal and load concentration are mutual face contact when oil film.Therefore, can prevent the traditional problem of load concentration on a point, so surface pressure greatly reduces.Its result can prevent the rupture of oil film that produces owing to the load that applies above the oil film ability to bear.Therefore, can avoid between bent axle and the bearing because of the directly scratch that produces of contact and stuck of metal.
In addition, the lubricated of sliding bearing can maintain under the critical lubricating status that causes Metal Contact.Therefore, can provide a kind of high efficiency compressor.
Below accompanying drawing of the present invention is made brief description
Fig. 1 is the sectional view according to valve plate critical piece in the dog link type closed type electromotive compressor of a specific embodiment of the present invention:
Fig. 2 is arranged on the planimetric map of exhaust valve plate in the compressor section shown in Figure 1;
Fig. 3 is the planimetric map of valve plate that has the compressor section of oil circuit according to a further embodiment of the invention;
Fig. 4 is the sectional view of critical piece that comprises the compressor of valve plate shown in Figure 3;
Fig. 5 is the sectional view of the critical piece of piston and cylinder in the compressor shown in Figure 1;
Fig. 6 describes because the sideshake of piston shown in Figure 5 and cylinder produces the amplification sectional view of tilting of the piston in compression process arbitrarily;
Fig. 7 is the partial enlarged drawing that the corresponding piston guide of inclination of description and piston shown in Figure 5 partly is formed slopely;
Fig. 8 is a partial enlarged drawing of describing the geometric locus that smooth connection piston guide shown in Figure 7 partly tilts to form;
Fig. 9 is the sectional view of piston and cylinder major component of piston guide part shown in Figure 8 in compression process;
Figure 10 is the enlarged view of outer surface of piston major component according to another embodiment of the present invention;
Figure 11 is the sectional view according to the outer surface of piston major component of further embodiment of this invention;
Figure 12 is the sectional view that is described in the part amplification of the oil groove shape of processing on the outer surface of piston shown in Figure 11;
Figure 13 is the sectional view according to the bearing critical piece that slides in crankshaft main journal of further embodiment of this invention;
Figure 14 is the enlarged view of critical piece shown in Figure 13;
Figure 15 is an illustraton of model of describing the method for processing tilt component according to further embodiment of this invention;
Figure 16 is the sectional view according to the another embodiment's of structure shown in Figure 13 bearing sliding parts critical piece;
Figure 17 describes the example schematic that hermetic motor compressor according to the present invention is applied to refrigeration cycle;
Figure 18 is the characteristic curve of comparison according to the bearing wear amount and the measurement result between the legacy equipment of Figure 13-16 illustrated embodiment;
Figure 19 is the vertical cross-section diagram of traditional closed type electromotive compressor;
The partial cross section view of Figure 20 piston that is compressor shown in Figure 19 in compression process arbitrarily and cylinder;
Figure 21 is the plotted curve that piston guide part lateral pressure changes in the expression compression process shown in Figure 20;
Figure 22 is a partial cross section view of describing tilting of the piston state shown in Figure 21;
Figure 23 describes the crankshaft rotating position and acts on graph of relation between the load on the piston;
Figure 24 is the illustraton of model of plain bearing;
Figure 25 is the sectional view of traditional hermetic motor compressor middle (center) bearing critical piece;
Figure 26 is the enlarged view of critical piece shown in Figure 25.
Narrate most preferred embodiment of the present invention below in conjunction with accompanying drawing.
1 and 2 introduce one embodiment of the present of invention in detail in conjunction with the accompanying drawings.
Fig. 1 has described the major component of closed type electromotive compressor valve member.Fig. 2 has described among Fig. 1 outlet valve in the compressor section, and this outlet valve has an Oil Guide passage.
The valve of closed type electromotive compressor shown in Figure 1 is to constitute like this, and outlet valve 12 shown in Figure 2 installs in the reciprocal compressor shown in Figure 1.Promptly as shown in Figure 1, Aspirating valves 13, valve plate 11, outlet valve 12, sealing gasket 14 and end cap 15 were contained on the cylinder 9 before fastening by bolt (omission) successively.As a result, oil duct 12c makes in outlet valve 12 between outlet valve 12 outer peripherys and the suction port 12a and has set up contact.
The cross-section area of oil duct 12c shown in Fig. 1 and 2 is made 0.3～2% of the suction port 11a area that processes on the valve plate 11.Its reason is as follows: if the cross-section area of oil duct 12c is too big, the flow velocity that difference between the pressure of the pressure at the edge of suction port 12a and end, 12b ingress, outer periphery and gas stream are crossed suction port 12a reduces inversely.As a result, You suction characteristic has degenerated.More groove is, the gas of suction directly sucks by oil duct 12c without the air suction silencer that designs, and the operating noise that drains to Aspirating valves from oil duct 12c has produced the problem that noise raises.If the cross-section area of oil duct 12c is too little, the oil of suction is too big through the resistance that oil channel 12c takes place, and therefore, the suction fluency of oil has degenerated.If the suction resistance of oil is big, be drawn in the cylinder and and refrigerant a part of lubricant oil circuit quantitative change in refrigeration cycle of discharging together too much, cause the thick oil film of heat exchanger generation that is arranged in the refrigeration cycle.Therefore, the problem that produces in this case is that refrigerating function is worsened.Yet this embodiment can suck correct oil mass and lubricate space between cylinder and the piston, has overcome the danger of too much suction excessive oil.
Narrate the working condition of above-mentioned closed type electromotive compressor now.
Similar with conventional art shown in Figure 19, when bent axle 6 rotations, cooling machine oil 18 moves upward along the shaft hole inner wall 6b of oil supply gallery, be sprayed onto on the compressor section 3 from the top 6e of bent axle 6, and be spread across on the periphery wall of cylinder 9, piston 10, valve plate 11, exhaust valve plate 12 and other each parts.
The oil that sprays from bent axle 6 top 6e arrives suction port 12a and 11a through oil channel 12c, is drawn in the cylinder 9 with the form of atomizing to cause oil.The oil that sucks cylinder has like this formed oil film on the inwall 9a of cylinder 9.In addition, oil is easy to be provided on the targeting part 10c of piston 10, and is lubricated to form.As shown in Figure 1, if the targeting part 10c of piston 10 makes taper, so that play a part surface contact portion, when compression stroke, the breaking of the oil film that forms on the undesirable cylinder 9 inwall 9a that just can avoid in sliding and running, being caused by piston 10 targeting part 10c.
Because this embodiment can make the gap between piston 10 and the cylinder 9 be decreased to minimum degree, so can prevent the deterioration of volumetric efficiency.In addition, can realize fully the fuel feeding of pistons reciprocating targeting part in lacking cylinder and lubricated, and needn't change this structure significantly, make and have only oil duct just must be formed on the traditional element.In addition, processing and assembling are also finished easily, have avoided increasing new element.Its result can provide a kind of low cost, satisfactory reliable closed type electromotive compressor.
Fig. 3 is the planimetric map of describing according to the valve plate that has oil duct in another embodiment of the present invention.Fig. 4 is a cross-sectional view of describing the valve member major component of the compressor that valve plate shown in Figure 3 is housed.Because element shown in Figure 4 element same as shown in Figure 3 represents that with identical label therefore description of them has been omitted here.
In order to be communicated with between the suction port 11a that sets up formed thereby on the valve plate 11 and the valve plate 11 outer periphery 11b, valve plate 11 shown in Figure 3 has oil duct 11c, and oil duct 11c forms and is fixed on the valve plate 11 on the surface of valve plate 11.
The cross-section area of oil duct 11c is made on the plate 11 0.3～2% of the suction port 11a cross-section area that forms.The reason of oil duct 12c is identical on its reason and the exhaust valve plate 12 shown in Figure 2.
This structure as shown in Figure 4, valve plate 11 installs on the cylinder 9.Fig. 3 and embodiment shown in Figure 4 and Fig. 1 be the same with embodiment shown in Figure 2 to have identical functions and advantage.
According to each embodiment of the present invention, in the closed type electromotive compressor that is provided, gap between cylinder and the piston can be very little of to prevent that volumetric efficiency from worsening, and between cylinder and piston fuel feeding and lubricated sufficiently, this compressor is processing and assembling easily, and can keep good efficient and satisfied reliability, can avoid obviously changing conventional construction.
Satisfy in use under the situation of new refrigerant HFC134a of chlorofluorocarbon regulation,, can preferentially be used as oil supplying device according to closed type electromotive compressor of the present invention in order to compensate the deterioration of oil lubrication performance.
Narrate an alternative embodiment of the invention in conjunction with Fig. 5 to Figure 12.
Fig. 5 has described the piston and the cylinder portion of dog link type closed type electromotive compressor.Fig. 6 has described the situation of the tilting of the piston that is caused by sideshake in any one compression process.Fig. 7 has described situation about partly tilting with the corresponding piston guide of tilting of the piston shown in Figure 5.Fig. 8 has described by connecting the resulting curve of piston guide part inclined trajectory shown in Figure 7.Fig. 9 has described piston guide part piston and cylinder portion in compression process shown in Figure 8.The compressor that is applicable to present embodiment is the same with common dog link type closed type electromotive compressor shown in Figure 19.
Referring to Fig. 5, L, L
1And L
2The length of having represented piston 10 motion compresses stroke in cylinder 9.The position of piston-top surface 10d motion is represented in double dot dash line.Symbol L represents when piston 10 is in lower dead centre from piston-top surface 10d to the distance the cylinder end face 9c.In addition, L
1And L
2Be illustrated in the distance that piston-top surface 10d moves from lower dead centre in arbitrary compression process.In this case, keep L
2＞L
1Relation.
Fig. 6 has described cylinder 9 and piston 10 interference state each other, when piston-top surface 10d moves to arbitrary position m apart from cylinder end face 9c, because the inclination of the piston 10 that sideshake produces increases, causes to interfere.
Fig. 7 has described a kind of structure, interferes in order to prevent in this structure, as the length L as shown in Figure 7 of compression process, L
1Or L
2The time, piston guide part 10c being provided a gap of avoiding interfering tilt, it is corresponding with the inclination of piston 10.
The track that the piston guide part 10c shown in Figure 7 that Fig. 8 represents to obtain continuously tilts, this track is represented with curve 10e.
Claims (13)
1. closed type electromotive compressor comprises:
A closed casing that holds cooling machine oil,
A motor that is contained in the described closed casing, the axis normal setting of its running shaft,
A compressor section that comprises piston and cylinder, when the top of inserting a piston during with the integrally formed bent axle of running shaft and described motor links, piston to-and-fro motion in described cylinder, described compressor section is with the centralized system bearing load, this load is produced by compression work to be finished in the compression stroke, it acts in a side and the cylinder of targeting part of described piston the relative inlet part of a described side with described piston guide part
Described running shaft contains on its axial direction the oil duct that is shaped by boring, and this running shaft partly rotates at the main journal of the one side bearing bent axle sliding bearing towards bearing, and its lower end is as open part and immerse in the cold oil,
It is characterized in that described compressor also comprises:
The load that the part of described compressor section and/or running shaft is born with centralized system becomes the surperficial contact device of surface contact; With
Be used to guide the oil-guide device of a part of cooling machine oil, cooling machine oil is along with the rotation of described running shaft moves upward by described oil duct, and is sprayed onto the described surperficial contact device towards described compressor section from the upper end of described running shaft.
2. closed type electromotive compressor as claimed in claim 1 is characterized in that, described surperficial contact device is made up of the curved surface with described piston guide part, and described piston guide part is relative with the inwall of described cylinder.
3. closed type electromotive compressor as claimed in claim 1, it is characterized in that, the oil-guide device of a part of described cooling machine oil of described guiding is formed in the valve plate that is incorporated within the described cylinder or in the exhaust valve plate, and a part of cooling machine oil is supplied with in the described cylinder so that this part oil is directed to the surface contact portion of the guide portion office of described piston.
4. closed type electromotive compressor as claimed in claim 1 is characterized in that, described surperficial contact device or be arranged on the main journal of described bent axle or on the sliding bearing part of described bearing.
5. closed type electromotive compressor as claimed in claim 1 is characterized in that, the refrigerant that is used for being connected the refrigeration cycle on the described closed type electromotive compressor be not chloride atom for replacing the refrigerant that substitutes that chlorofluorocarbon is used.
6. closed type electromotive compressor as claimed in claim 1, it is characterized in that, guide described a part of cooling machine oil in the cylinder of described compressor section in order to the described oil-guide device of guiding the surperficial contact device of a part of cooling machine oil to described compressor section.
7. closed type electromotive compressor as claimed in claim 6, it is characterized in that, the described oil-guide device that a part of cooling machine oil is directed in the described cylinder is an oil duct, be used between the suction port that forms on the compressor section exhaust valve plate and this exhaust valve plate outer surface, forming and be connected, and the oil duct cross-section area is the 0.3-2% of suction port area.
8. closed type electromotive compressor as claimed in claim 1 is characterized in that, comprising:
In order to guide the oil-guide device of a cooling machine oil to the described surperficial contact device of described compressor section, guide described a part of cooling machine oil in the described cylinder of described compressor section, described a part of cooling machine oil contacts with the cylinder surface of described compressor section, described compressor section is born a load with centralized system and described surperficial contact device is kept the oil film that is formed by the described a part of cooling machine oil that directs in the described surperficial contact device, and described oil film remains in the gap between described cylinder and the described piston.
9. closed type electromotive compressor as claimed in claim 8, it is characterized in that, being the surperficial surface configuration that contacts each other with the described piston guide part and the internal surface of described cylinder is the continuous path that is processed into the curved surface that has inclination on the targeting part of described piston, so that eliminate each the locational interference from the lower dead centre of compression stroke on described cylinder-bore axis direction of described piston, described curved surface has and the corresponding to inclined-plane of the inclination of described piston degree.
10. closed type electromotive compressor as claimed in claim 8, it is characterized in that, described device in order to maintenance oil film in the gap between cylinder and piston is the oil groove on the outer surface of described piston, and described oil groove is fed to a sliding parts to the oil that the chamfered part that inserts the insertion portion end of piston from described cylinder is directed to the outer surface of described piston.
11. closed type electromotive compressor as claimed in claim 8, it is characterized in that, at the described oil groove that described outer surface of piston forms, approximately do at an angle of 90 facing to the end face of described piston and with the axis of described piston the one end, and described oil groove is inclined surface with the part of close piston-top surface.
12. closed type electromotive compressor as claimed in claim 1 is characterized in that, comprising:
Being received in described surperficial contact device on the running shaft with centralized system is provided with described a part of cooling machine oil is sprayed onto on the compressor section on the main journal of bent axle and/or the device on the internal surface of the sliding bearing of bearing part, and form a shape, when having oil film, just can obtain the surface contact at least at maximum load point place with this shape.
13. described closed type electromotive compressor as claim 12, it is characterized in that, obtain the shape of surface contact in order to the maximum load point place between the internal surface of the sliding bearing of crankshaft main journal and bearing part at least, it assigns to realize by means of little tapered portion of formation, this tapering part is consistent with the inclination of bent axle in the gap of main journal and sliding bearing, and this tapering part has the tiltangle that a tilt angle equals this bent axle
0, and keep 2 θ＞θ
0The relation of＞θ, it is on the main journal and/or form on the sliding bearing part.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP04243151A JP3140201B2 (en) | 1992-09-11 | 1992-09-11 | Hermetic electric compressor |
| JP243151/92 | 1992-09-11 | ||
| JP4307393A JP2997373B2 (en) | 1992-11-18 | 1992-11-18 | Hermetic electric compressor |
| JP307393/92 | 1992-11-18 | ||
| JP146372/93 | 1993-06-17 | ||
| JP05146372A JP3130704B2 (en) | 1993-06-17 | 1993-06-17 | Hermetic compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1090376A CN1090376A (en) | 1994-08-03 |
| CN1036021C true CN1036021C (en) | 1997-10-01 |
Family
ID=27319166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN93119077A Expired - Fee Related CN1036021C (en) | 1992-09-11 | 1993-09-11 | Closed type electromotive compressor |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR940007372A (en) |
| CN (1) | CN1036021C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0153343B1 (en) * | 1995-10-13 | 1999-03-20 | 김광호 | Reciprocating compressor |
| JP5170111B2 (en) * | 2008-05-12 | 2013-03-27 | パナソニック株式会社 | Hermetic compressor and refrigeration apparatus using the same |
| JP5406260B2 (en) * | 2011-09-29 | 2014-02-05 | Ｊｘ日鉱日石金属株式会社 | Method for separating aluminum and manganese |
| JP5161361B1 (en) * | 2011-12-28 | 2013-03-13 | Ｊｘ日鉱日石金属株式会社 | Method for separating metal in mixed metal solution |
| JP5404839B2 (en) * | 2012-03-29 | 2014-02-05 | 三菱電機株式会社 | Fuel supply device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4576555A (en) * | 1984-11-13 | 1986-03-18 | Tecumseh Products Company | Oil dispersing device |
-
1993
- 1993-09-08 KR KR1019930017952A patent/KR940007372A/en not_active Application Discontinuation
- 1993-09-11 CN CN93119077A patent/CN1036021C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4576555A (en) * | 1984-11-13 | 1986-03-18 | Tecumseh Products Company | Oil dispersing device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR940007372A (en) | 1994-04-27 |
| CN1090376A (en) | 1994-08-03 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19971001 Termination date: 20120911 |