CN1773111A - Sealed electric compressor - Google Patents
Sealed electric compressor Download PDFInfo
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- CN1773111A CN1773111A CN 200510114182 CN200510114182A CN1773111A CN 1773111 A CN1773111 A CN 1773111A CN 200510114182 CN200510114182 CN 200510114182 CN 200510114182 A CN200510114182 A CN 200510114182A CN 1773111 A CN1773111 A CN 1773111A
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- Prior art keywords
- electric compressor
- sealed electric
- ball bearing
- thrust
- frequency
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Links
- 230000005484 gravity Effects 0.000 claims abstract description 7
- 239000003507 refrigerant Substances 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 22
- 238000005461 lubrication Methods 0.000 claims description 15
- 239000004215 Carbon black (E152) Substances 0.000 claims description 12
- 229930195733 hydrocarbon Natural products 0.000 claims description 12
- 150000002430 hydrocarbons Chemical class 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000007787 solid Substances 0.000 claims description 11
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 8
- 239000011737 fluorine Substances 0.000 claims description 8
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 claims description 2
- 230000001050 lubricating effect Effects 0.000 abstract description 15
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000010721 machine oil Substances 0.000 description 50
- 239000000446 fuel Substances 0.000 description 27
- 230000006866 deterioration Effects 0.000 description 16
- 230000015572 biosynthetic process Effects 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 239000002480 mineral oil Substances 0.000 description 6
- 235000010446 mineral oil Nutrition 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 238000005304 joining Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000010725 compressor oil Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 229920002620 polyvinyl fluoride Polymers 0.000 description 1
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Abstract
To prevent abrasion of a slide part occurring when the lubricating state of the slide part is worsened, in an inverter drive type hermetic electric compressor. In the hermetic electric compressor on which an inverter device 150 is loaded, by disposing a thrust ball bearing 114 on a thrust surface 107a of a bearing part 107 receiving the gravity load of a rotor 104, since a load applied in a thrust direction is all received by the thrust ball bearing 114 even in a state that a lubricating state is worsened, a friction factor in a rotation direction is decreased and friction can be prevented from occurring.
Description
Technical field
The present invention relates to the sealed electric compressor of a kind of use in fridge-freezer etc.
Background technique
In existing this sealed electric compressor, generally be provided with the thrust washer that forms fluid lubrication by compressor oil (hereinafter to be referred as " machine oil "), an example wherein can be opened flat 10-54361 with reference to the Japanese patent gazette spy.
With reference to the accompanying drawings existing sealed electric compressor is described.
Fig. 7 is the side cross-sectional, view that above-mentioned Japanese patent gazette spy opens the existing sealed electric compressor among the flat 10-54361, and Fig. 8 is the schematic representation of part important structure after amplifying in this existing sealed electric compressor.
As shown in Fig. 7 and Fig. 8, motor drive mechanism 2 is housed and by these motor drive mechanism 2 compressor driven structures 5 in the seal container 1, motor drive mechanism 2 is made of stator 3 and the inner rotor 4 that is provided with the permanent magnet (not shown).Storage organic oil 6 on the bottom of sealing appearance 1.
Be provided with in the compressing mechanism 5: be provided with bearing 7 and form the cylinder block 9 of cylinder 8; Bent axle 10 with eccentric part 10a and main shaft portion 10b; Reciprocating piston 11 in cylinder 8; With the connecting rod 12 that the eccentric part 10a on the bent axle 10 and piston 11 are connected.In addition, in the lower end of the eccentric part 10a of bent axle 10, the fuel supply line 13 that constitutes centrifugal pump is installed.
In the groove part that forms between bent axle 10 and the rotor 4 thrust washer 14a and the 14b that Chilled Hardened Steel is made is installed, and holding of forming of the upper end of bearing 7 push away face 7a and between slide.Bearing 7 is made by cast iron or aluminium, and the face 7a of pushing away that holds of its upper end is provided with the oily spout 7b that allows machine oil 6 that fuel supply line 13 drinks up flow out.
Frequency-converter device 50 is electrically connected with stator 3.Control circuit 51 is used for frequency-converter device 50 is controlled, and mains supply 52 is electrically connected with control circuit 51 and frequency-converter device 50.
Below the operational circumstances in the sealed electric compressor with above formation is described.
The power that provides from mains supply 52 is added on the motor drive mechanism 2 through control circuit 51 and frequency-converter device 50, and the rotor 4 in the motor drive mechanism 2 can be rotated with rotating speed arbitrarily.
When rotor 4 rotations, bent axle 10 is rotation thereupon also, and is promptly reciprocating in cylinder 8 with the joining piston 11 of eccentric part 10a of bent axle 10 by connecting rod 12, and refrigerant gas is compressed.
Meanwhile, the machine oil 6 that fuel supply line 13 will be stored in the seal container 1 picks up, and supplies in each sliding parts, and these sliding partss are lubricated; Afterwards, machine oil 6 flows out from oily spout 7b, and the machine oil 6 that flows out from oily spout 7b is lubricated the sliding parts that pushes away on the face 7a that holds of the upper end that is formed on bearing 7 again.
But in above-mentioned existing formation, the motor that frequency-converter device 50 is installed is different with induction motor, might carry out work on the frequency of mains frequencies being lower than.Be lower than in the working state of mains frequencies in frequency, provide to the amount of the machine oil 6 of sliding parts and will reduce, cause the lubricating status deterioration by fuel supply line 13.
In addition, when just starting, the machine oil 6 that provides by fuel supply line 13 also no show hold push away the slip surface that forms between face 7a and the thrust washer 14a, and the main shaft portion 10b of bent axle 10 and bearing 7 between on the slip surface that forms, also do not kept supplying oil on these sliding partss.At this moment, these sliding partss can only lean on machine oil remaining, attached thereto to be lubricated, so lubricating status will deterioration.
In addition, carry out under the occasion of work with for example 25Hz or following very low operation frequency at frequency-converter device 50, to push away the oil pressure that produces on the slip surface that forms between face 7a and the thrust washer 14a very low holding, and causes directly contact mutually between the metal easily.
When above-mentioned state takes place, will produce the problems that abrasions take place easily for the main shaft portion 10b that pushes away face 7a, bent axle 10 and bearing 7 of holding.
Summary of the invention
The present invention is intended to solve the above-mentioned problems in the prior art, and its purpose is to provide a kind of sealed electric compressor that frequency-converter device is installed and has high reliability.
In order to solve the above-mentioned problems in the prior art, the face of pushing away that holds of the bearing part of the gravity load of bear rotor is provided with thrust ball bearing in the frequency variator drive-type sealed electric compressor of the present invention.Like this, even under the state of lubricating status deterioration, all loads on the thrust direction are born by ball bearing, therefore, can produce the friction factor that reduces sense of rotation, prevent the effect of wearing and tearing.
In addition, in order to solve the above-mentioned problems in the prior art, in the frequency variator drive-type sealed electric compressor of the present invention at the radial ball bearing that is provided with between bent axle and the bearing part more than 2 or 2.Like this, even under the state of lubricating status deterioration, the load of radial direction is also all by being born by ball bearing.Therefore, can produce the friction factor that reduces sense of rotation, prevent the effect of wearing and tearing.
In addition, in order to solve the above-mentioned problems in the prior art, the face of pushing away that holds of the bearing part of bear rotor gravity load is provided with the thrust washer that has the solid lubrication coating in the frequency variator drive-type sealed electric compressor of the present invention.Like this, even under the state of lubricating status deterioration, also can reach and reduce friction factor, prevent the effect of wearing and tearing by the self-lubrication of solid lubrication coating.
The technique effect that the present invention produces is as follows.Sealed electric compressor of the present invention can improve the sliding mode of sliding parts in frequency variator drive-type sealed electric compressor, improve the reliability of sealed electric compressor.
The specific embodiment of the present invention is summarized as follows.In the solution of the present invention 1 described sealed electric compressor, be equipped with in the seal container refrigerant is carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism; Comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device.Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and the face of pushing away that holds that bears the gravity load of described rotor in the described bearing part is provided with thrust ball bearing.Like this, in frequency variator drive-type sealed electric compressor, machine oil also was not supplied under the occasion of sliding parts when the oil level that is lower than mains frequencies, supply in frequency of okperation seldom reached and just started, deterioration has taken place even hold the lubricating status of the face of pushing away, but be provided with thrust ball bearing owing to hold the face of pushing away, thrust load is all born by ball bearing, therefore, can reduce the slide area of sense of rotation, reduce friction factor, prevent to hold the face of pushing away and wear and tear, thereby a kind of sealed electric compressor of high reliability can be provided.
The solution of the present invention 2 is, in the sealed electric compressor described in the scheme 1, described thrust ball bearing is clamped by 2 or more thrust plate.Like this, by clamping thrust ball bearing, in the not good thrust part of surface smoothness, also can adopt ball bearing, thereby a kind of sealed electric compressor of high reliability can be provided with 2 thrust plates.
Be that at the sealed electric compressor described in the scheme 2, at least one side in described thrust ball bearing and the thrust washer is formed by the nonmagnetic material material in the solution of the present invention 3.Use after the material of nonmagnetic material, the permanent magnet that belongs to terres rares that material just can not be set at the stator interior of sealed electric compressor magnetizes, hold impurity such as just can not adsorbing iron powder on the face of pushing away, a kind of sealed electric compressor of high reliability so just can be provided, and can reduce the iron loss in the sealed electric compressor, raise the efficiency.
In the sealed electric compressor in scheme 4, be equipped with in the seal container refrigerant is carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism, comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device; Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and be provided with 2 or more radial ball bearing between described bent axle and described bearing part, described bent axle positions by described radial ball bearing.Like this, in frequency variator drive-type sealed electric compressor, be lower than mains frequencies in frequency of okperation, the oil level of supplying with reaches seldom that machine oil also is not supplied under the occasion of sliding parts when just having started, even deterioration has taken place in the lubricating status of bent axle and bearing part, because bent axle and bearing part and between be provided with radial ball bearing more than 2 or 2, the load of all radial direction is all born by ball bearing, therefore, the friction factor of sense of rotation can reduce, thereby a kind of wearing and tearing that can prevent bent axle and bearing part can be provided, the sealed electric compressor that reliability is high.
The solution of the present invention 5 is, in scheme 4 described sealed electric compressors, in the described radial ball bearing at least 1 is formed by the nonmagnetic material material.Use after the material of nonmagnetic material, the permanent magnet that belongs to terres rares that material just can not be set at the stator interior of sealed electric compressor magnetizes, just can not adsorb impurity such as iron powder on the slip surface of bent axle and bearing part, a kind of sealed electric compressor of high reliability so just can be provided, and can reduce the iron loss in the sealed electric compressor, raise the efficiency.
In the sealed electric compressor described in the scheme 6, be equipped with in the seal container refrigerant is carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism, comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device.Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and the face of pushing away that holds that bears the gravity load of described rotor in the described bearing part is provided with the thrust washer that has the solid lubrication coating.Like this, in frequency variator drive-type sealed electric compressor, machine oil also was not supplied under the occasion of sliding parts when the oil level that is lower than mains frequencies, supply in frequency of okperation seldom reached and just started, deterioration has taken place even hold the lubricating status of the face of pushing away, but owing to can reduce friction factor, thereby can provide a kind of sealed electric compressor that can prevent the thrust wearing and tearing and have high reliability by the self-lubrication of solid lubrication coating.
The solution of the present invention 7 is that the refrigeration agent that uses in each of above-mentioned scheme 1～6 is the hydrocarbon class refrigerant of not chloride element and fluorine element.Because the meltage of hydrocarbon class refrigerant in machine oil is a lot, when starting, be easy to generate foam, after being inhaled into, foam encumbers fuel feeding easily; Under the few occasion of the oil level that is operated on the frequency that is lower than mains frequencies at frequency variator drive-type sealed electric compressor in addition, supplies with, and also be not fed in the sliding parts under the occasion just starting back machine oil, deterioration can take place in the lubricating status that holds the face of pushing away and bent axle and bearing part.But even under such occasion, owing to by the countermeasure of scheme 1～6 thrust load is all born by ball bearing, so the slide area of sense of rotation can reduce, friction factor can reduce; Simultaneously, owing to the load of radial direction is also all born by ball bearing, so the friction factor of sense of rotation can reduce.In addition, owing to rely on the self-lubrication of solid lubrication coating also can reduce friction factor, therefore can provide a kind of sealed electric compressor that can prevent to hold the wearing and tearing of the face of pushing away, bent axle and bearing part and have very high reliability.
Description of drawings
Fig. 1 is the side cross-sectional, view of the sealed electric compressor of the embodiment of the invention 1,
Fig. 2 is the enlarged diagram of the part important structure in the sealed electric compressor of the embodiment of the invention 1,
Fig. 3 is the side cross-sectional, view of the sealed electric compressor of the embodiment of the invention 2,
Fig. 4 is the enlarged diagram of the part important structure in the sealed electric compressor of the embodiment of the invention 2,
Fig. 5 is the side cross-sectional, view of the sealed electric compressor of the embodiment of the invention 3,
Fig. 6 is the enlarged diagram of the part important structure in the sealed electric compressor of the embodiment of the invention 3,
Fig. 7 is the side cross-sectional, view of existing sealed electric compressor,
Fig. 8 is the enlarged diagram of the part important structure in the existing sealed electric compressor.
In above-mentioned accompanying drawing, 101,201,301 is seal container, 102,202,302 is motor drive mechanism, 103,203,303 is stator, 104,204,304 is rotor, 105,205,305 is compressing mechanism, 107,207,307 is bearing part, and 107a, 307a are for holding the face of pushing away, and 110,210,310 is bent axle, 114 is thrust ball bearing, 118a, 118b are thrust plate, and 150,250,350 is frequency-converter device, and 214a, 214b are radial ball bearing, 314a, 314b are thrust washer, and 314c is the solid lubrication coating.
Embodiment
Below, come some embodiments of the present invention are elaborated with reference to accompanying drawing.Need to prove that such embodiment does not produce the effect of the present invention that limits.
(embodiment 1)
The side cross-sectional, view of the sealed electric compressor of Fig. 1 embodiment of the invention 1, Fig. 2 is the enlarged diagram of the part important structure in the sealed electric compressor among this embodiment.
As shown in Fig. 1, Fig. 2, motor drive mechanism 102 is housed in the seal container 101 and motor drive mechanism 102 carries out compressor driven structure 105.Motor drive mechanism 102 is made of stator 103 and the inner rotor 104 that is provided with the permanent magnet (not shown), and the machine oil of being made by mineral oil 106 is being stored in the bottom of seal container 101.In addition, the not chloride element of refrigerant use and the hydrocarbon class refrigerant of fluorine element.
Be provided with in the compressing mechanism 105: the cylinder block 109 that is provided with bearing part 107, formation cylinder 108; Bent axle 110 with eccentric part 110a and main shaft portion 110b; Reciprocating piston 111 in cylinder 108; The connecting rod 112 that is connected with eccentric part 110a and piston 111 with bent axle 110.In addition, on the underpart of the eccentric part 110a of bent axle 110, the fuel supply line 113 that constitutes centrifugal pump is installed.
Bearing part 107 is made of aluminum, and the face 107a of pushing away that holds of its upper end is provided with the oily spout 107b that the machine oil 106 that allows fuel supply line 113 supply with flows out, and holds to push away between face 107a and the rotor 104 to have clamped thrust ball bearing 114.
Thrust ball bearing 114 is made of guide plate 117 and thrust plate 118a, 118b.Guide plate 117 is provided with a plurality of bullports 116 that are used for maintaining in rotation mode freely thrust ball 115, and thrust plate 118a, 118b are separately positioned on the upper and lower of thrust ball 115, and taking place to roll with thrust ball 115 contacts.
Frequency-converter device 150 is electrically connected with stator 103, and control circuit 151 is used for frequency-converter device 150 is controlled, and mains supply 152 is added on control circuit 151 and the frequency-converter device 150.
Below working condition in the sealed electric compressor with said structure and effect thereof are described.
The power that provides from mains supply 152 is added on the motor drive mechanism 102 through control circuit 151, frequency-converter device 150, thereby the rotor 104 in the motor drive mechanism 102 can be rotated with rotating speed arbitrarily.
When rotor 104 rotations, bent axle 110 is rotation thereupon also, and piston 111 compresses refrigerant gas by reciprocating in cylinder 108 with the joining connecting rod 112 of the eccentric part 110a of bent axle 110.
At this moment, the machine oil 106 that fuel supply line 113 can will be stored in the seal container 101 picks up, and supplies in each sliding parts, and each sliding parts is lubricated, and flows out from oily spout 107b then.The machine oil 106 that flows out from oily spout 107b pushes away face 107a, thrust ball bearing 114 and thrust plate 118a, 118b and is lubricated holding again.
The motor that frequency-converter device 150 is housed here is different with general induction motor, can operate under for example 25Hz or the frequency that is lower than mains frequencies such as lower.Be lower than in frequency under the working state of mains frequencies, provide to the amount of the machine oil 106 of sliding parts from fuel supply line 113 and will reduce lubricating status generation deterioration.In addition, when just starting, the machine oil of being supplied with by fuel supply line 113 106 also not have arrival to hold to push away therefore, do not have oil to supply in these sliding partss on the slip surface that face 107a, thrust ball bearing 114 and thrust plate 118a, 118b form.
Like this, hold lubricated will under the amount state seldom of the machine oil of supplying with 106, the carrying out on the slip surface that pushes away face 107a, thrust ball bearing 141 and thrust plate 118a, 118b formation, perhaps can only be undertaken by machine oil remaining, attached thereto.
But, owing to be provided with thrust ball bearing 114 in the present embodiment, and what the thrust ball in the thrust ball bearing 114 115 and thrust plate 118a, 118b carried out is to roll to contact, so the friction factor of sense of rotation is very little, even therefore the amount of the machine oil 106 that adds seldom or only relies on little by little machine oil attached thereto, also can prevent bonding, wear and tear hardly between thrust ball 115 and thrust plate 118a, the 118b, thereby can realize very high reliability.
In addition, by reducing the friction factor on the sense of rotation, can reduce slippage loss, its result can make the working efficiency of compressor be improved.
On the other hand, by with the nonmagnetic material material for example pottery form thrust ball bearing 114 and thrust plate 118a, 118b, can make thrust ball bearing 114 and thrust plate 118a, 118b can not be set at the permanent magnet (not shown) magnetization of the inside of rotor 104, thereby can not produce the phenomenon of foreign material such as absorption iron powder, reliability can further be improved.
What use in the present embodiment in addition, is the hydrocarbon class refrigerant of not chloride element and fluorine element in the refrigerant.Though the mutual dissolubility between hydrocarbon class refrigerant and the machine oil 106 made by mineral oil is very high, refrigerant gas can evaporate from machine oil 106 when making starting, make fuel supply line 113 be stopped up by refrigerant gas, and make to hold and push away face 107a, thrust ball bearing 114 and thrust plate 118a, fuel feeding state generation deterioration on the slip surface that 118b forms, but, even if under such occasion, owing to be provided with thrust ball bearing 114 in the present embodiment, and thrust ball bearing 114 and thrust ball 115 and thrust plate 118a, 118b carrying out like that as previously described be the contact of rolling, the friction factor of sense of rotation can reduce, even if therefore only also can prevent bonding, therefore can realize a kind of thrust ball 115 and thrust plate 118a by its a spot of machine oil attached thereto, wear and tear hardly between the 118b, and the compressor that reliability is high.
(embodiment 2)
The side cross-sectional, view of the sealed electric compressor in Fig. 3 embodiment of the invention 2, Fig. 4 is the enlarged diagram of the part important structure in the sealed electric compressor among this embodiment.
As shown in Fig. 3, Fig. 4, motor drive mechanism 202 is housed and in the seal container 201 by this motor drive mechanism 202 compressor driven structure 205 in addition.Motor drive mechanism 202 is made of stator 203 and the inner rotor 204 that is provided with the permanent magnet (not shown), and the bottom storage of seal container 201 has the machine oil of being made by mineral oil 206.What in addition, refrigerant used is the hydrocarbon class refrigerant of not chloride element and fluorine element.
Be equipped with in the compressing mechanism 205: the cylinder block 209 that is provided with bearing part 207, formation cylinder 208; Bent axle 210 with eccentric part 210a and main shaft portion 210b; The piston 211 that in cylinder 208, moves back and forth; The connecting rod 212 that is connected with eccentric part 210a and piston 211 with bent axle 210.In addition, on the underpart of the eccentric part 210a of bent axle 210, the fuel supply line 213 that constitutes centrifugal pump is installed.
Bearing part 207 is made of aluminum, and 2 radial ball bearing 214a, 214b are pressed into motor drive mechanism side and compressing mechanism side respectively, and thrust load is born by the radial ball bearing 214a that is pressed into top one side.
Comprise respectively among 2 radial ball bearing 214a, 214b: inner ring guided rings 215a, 215b, outer ring guided rings 216a, 216b and be clipped between above-mentioned inner ring guided rings 215a, 215b and outer ring guided rings 216a, the 216b rotation radially ball 217a, 217b freely.
And 2 radial ball bearing 214a, 214b aperture surface separately is pressed on the main shaft portion 210b of bent axle 210.On the main shaft portion 210b outer circumferential face, be carved with the oil guide slot 218 that is connected with fuel supply line 213, this oil guide slot 218 1 is through to the radial ball bearing 214a place that is in the top.
Frequency-converter device 250 is electrically connected with stator 203.Control circuit 251 is used for frequency-converter device 250 is controlled, and mains supply 252 is electrically connected with control circuit 251 and frequency-converter device 250.
Working condition and effect thereof to sealed electric compressor with above-mentioned formation is described below.
The power of supplying with from mains supply 252 is added on the motor drive mechanism 202 through control circuit 251, frequency-converter device 250, and the rotor 204 of motor drive mechanism 202 can be rotated with rotating speed arbitrarily.
When rotor 204 rotations, bent axle 210 is rotation thereupon also, and piston 211 is reciprocating in cylinder 208 under acting on the joining connecting rod 212 of the eccentric part 210a of bent axle 210, and refrigerant gas is compressed.
At this moment, the machine oil 206 that fuel supply line 213 can will be stored in the seal container 201 picks up, and supplies with each sliding parts, and each sliding parts is lubricated.
The motor that frequency-converter device 250 is installed here is different with general induction motor, can for example work on 25Hz or the frequency that is lower than mains frequencies below the 25Hz.Be lower than in frequency under the working state of mains frequencies, the amount that is supplied to the machine oil 206 of sliding parts by fuel supply line 213 will reduce, and lubricating status can deterioration.In addition, when just starting, the machine oil 206 that fuel supply line 213 provides does not also arrive on the slip surface of bent axle 210 and bearing part 207 formation, does not also arrive in the sliding parts.
Like this, the lubricated of bent axle 210 and bearing part 207 will carry out under the amount state seldom of the machine oil of supplying with 206, perhaps can only be undertaken by machine oil remaining, attached thereto.
But, owing to be provided with radial ball bearing 214a in the present embodiment, 214b, and radial ball bearing 214a, radially ball 217a among the 214b, 217b is at the inner ring guided rings 215a that is pressed on the bent axle, 215b and the outer ring guided rings 216a that is pressed on the bearing part 207, be rotated rolling contact freely between the 216b, so the friction factor of sense of rotation is very little, even therefore the amount of the machine oil 106 that adds seldom or only relies on little by little machine oil attached thereto, also can prevent bonding, ball 217a radially, 217b, inner ring guided rings 215a, 215b and outer ring guided rings 216a, wear and tear hardly between the 216b, thereby can realize very high reliability.
In addition, by reducing the friction factor on the sense of rotation, can reduce slippage loss, its result can improve the working efficiency of compressor.
On the other hand, by with the nonmagnetic material material for example pottery form radial ball bearing 214a, 214b, can make radial ball bearing 214a, 214b can not be set at the permanent magnet (not shown) magnetization of the inside of rotor 104, thereby can not produce the phenomenon of foreign material such as absorption iron powder, reliability can further improve.
What use in the present embodiment in addition, is the hydrocarbon class refrigerant of not chloride element and fluorine element in the refrigerant.Though the mutual dissolubility between hydrocarbon class refrigerant and the machine oil 206 made by mineral oil is very high, refrigerant gas can evaporate from machine oil 206 in the time of can making starting, make fuel supply line 213 be stopped up by refrigerant gas, and make the fuel feeding state generation deterioration on the slip surface that bent axle 210 and bearing part 207 form, but, even if under such occasion, owing to be provided with radial ball bearing 214a in the present embodiment, 214b, and ball 217a radially, 217b and inner ring guided rings 215a, 215b and outer ring guided rings 216a, 216b carrying out like that as previously described be the contact of rolling, the friction factor of sense of rotation can reduce, even if therefore only also can prevent bonding by its a spot of machine oil that is adhering to, therefore can make radially ball 217a, 217b and inner ring guided rings 215a, 215b and outer ring guided rings 216a, wear and tear hardly between the 216b, realize very high reliability.
(embodiment 3)
The side cross-sectional, view of the sealed electric compressor in Fig. 5 embodiment of the invention 3, Fig. 6 is the enlarged diagram of the part important structure in the sealed electric compressor among this embodiment.
As shown in Fig. 5, Fig. 6, motor drive mechanism 302 is housed and in the seal container 301 by motor drive mechanism 302 compressor driven structures 305.Motor drive mechanism 302 is made of stator 303 and the inner rotor 304 that is provided with the permanent magnet (not shown).The bottom storage of sealing appearance 301 has the machine oil of being made by mineral oil 306.What in addition, refrigerant used is the hydrocarbon class refrigerant of not chloride element and fluorine element.
Be provided with in the compressing mechanism 305: the cylinder block 309 that is provided with bearing part 307, formation cylinder 308; Bent axle 310 with eccentric part 310a and main shaft portion 310b; Reciprocating piston 311 in cylinder 308; The connecting rod 312 that the eccentric part 310a and the piston 311 of bent axle 310 connected.In addition, the lower end of the eccentric part 310a of bent axle 310 is equipped with the fuel supply line 313 that constitutes centrifugal pump.
Bearing part 307 is made of aluminum, and the face 307a of pushing away that holds of its upper end is provided with the oily spout 307b that the machine oil 306 that allows fuel supply line 313 supply with flows out; Hold to push away and be lined with thrust washer 314a, the 314b that is provided with solid lubrication coating 314c between face 307a and the rotor 304.
Frequency-converter device 350 is electrically connected with stator 303.Control circuit 351 is used for frequency-converter device 350 is controlled, and mains supply 352 is electrically connected with control circuit 351 and frequency-converter device 350.
Below working condition in the sealed electric compressor with above formation and effect are described.
The power that provides from mains supply 352 supplies to the motor drive mechanism 302 through control circuit 351, frequency-converter device 350, and the rotor 304 in the motor drive mechanism 302 can rotated under the rotating speed arbitrarily.
When rotor 304 rotation, bent axle 310 also will rotate thereupon, piston 311 with the effect of the joining connecting rod 312 of the eccentric part 310a of bent axle 310 under reciprocating in cylinder 308, refrigerant gas is compressed.
At this moment, the machine oil 306 that fuel supply line 313 will be stored in the seal container 301 picks up, and supplies in each sliding parts, and each sliding parts is lubricated, and flows out from oily spout 307b then.The machine oil 306 that flows out from oily spout 307b pushes away face 307a and thrust washer 314a, 314b are lubricated to holding again.
The motor that frequency-converter device 250 is installed here is different with general induction motor, can for example carry out work on 25Hz or the frequency that is lower than mains frequencies below the 25Hz.Be lower than in frequency under the working state of mains frequencies, the amount that is supplied to the machine oil 306 of sliding parts from fuel supply line 313 will reduce, and lubricating status will deterioration.In addition, when just starting, the machine oil 306 that provides from fuel supply line 313 does not also have to arrive to hold and pushes away on the slip surface that face 307a and thrust washer 314a, 314b form, and does not also supply in these sliding partss.
Like this, hold the lubricated of slip surface that pushes away face 307a and thrust washer 314a, 314b formation and will under the amount state seldom of the machine oil of supplying with 306, carry out, perhaps can only be undertaken by machine oil remaining, attached thereto.
But, owing to be provided with thrust washer 314a, 314b among the present invention, and thrust washer 314a, 314b are provided with solid lubrication coating 314c, so the friction factor on the sense of rotation is very little, even therefore the amount of the machine oil 306 that adds seldom or only relies on little by little machine oil attached thereto, also can prevent bonding, hold to push away between face 307a and thrust washer 314a, the 314b and wear and tear hardly, thereby can realize very high reliability.
In addition, by reducing the friction factor on the sense of rotation, can reduce slippage loss, its result can improve the working efficiency of compressor.
What use in the present embodiment in addition, is the hydrocarbon class refrigerant of not chloride element and fluorine element in the refrigerant.Though the mutual dissolubility between hydrocarbon class refrigerant and the machine oil 306 that is made of mineral oil is very high, refrigerant gas can evaporate from machine oil 306 when the result made starting, make fuel supply line 313 be stopped up by refrigerant gas, and make to hold and push away face 307a and thrust washer 314a, fuel feeding state generation deterioration on the slip surface that 314b forms, but, even if under such occasion, owing to be provided with thrust washer 314a among the present invention, 314b, and thrust washer 314a, on the 314b as previously described be provided with solid lubrication coating 314c like that, the friction factor of sense of rotation can reduce, even if therefore only also can prevent bonding by its a spot of machine oil that is adhering to, therefore can make to hold and push away face 307a and thrust washer 314a, wear and tear hardly between the 314b, thereby can realize the compressor that a kind of reliability is very high.
In addition, though that the last setting of in the above embodiments thrust washer 314a, 314b is solid lubrication coating 314c, but, adopt additive method as molybdenum disulfide is carried out beam treatment (promptly, with the prill jet material surface is clashed into processing), the material of thrust washer 314a, 314b uses 4 PVFs etc., can reach too to prevent the effect of wearing and tearing.
In sum, in frequency variator drive-type sealed electric compressor of the present invention,, also can carry out the oneself and lubricate even deterioration has appearred in the lubricating status of sliding parts, therefore not only can use in fridge-freezer, can also be useful in air conditioner, the vending machine etc.
Claims (7)
1. sealed electric compressor is characterized in that: is equipped with in the seal container refrigerant carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism,
Comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device,
Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and the face of pushing away that holds that bears the gravity load of described rotor in the described bearing part is provided with thrust ball bearing.
2. the sealed electric compressor described in claim 1 is characterized in that: described thrust ball bearing is clamped by 2 or more thrust plate.
3. the sealed electric compressor described in claim 2, it is characterized in that: at least one side in described thrust ball bearing and the thrust washer is formed by the nonmagnetic material material.
4. sealed electric compressor is characterized in that: is equipped with in the seal container refrigerant carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism,
Comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device,
Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and be provided with 2 or more radial ball bearing between described bent axle and described bearing part, described bent axle positions by described radial ball bearing.
5. the sealed electric compressor described in claim 4 is characterized in that: at least 1 of described radial ball bearing is formed by the nonmagnetic material material.
6. sealed electric compressor is characterized in that: is equipped with in the seal container refrigerant carried out the compressor for compressing structure and drives the motor drive mechanism of described compressing mechanism,
Comprise stator and rotor in the described motor drive mechanism, driven with 2 kinds or more characteristic frequency by frequency-converter device,
Described compressing mechanism comprises: with described rotor fixed crankshaft and support the bearing part of described bent axle in addition, and the face of pushing away that holds that bears the gravity load of described rotor in the described bearing part is provided with the thrust washer that has the solid lubrication coating.
7. as each the described sealed electric compressor in the claim 1 to 6, it is characterized in that: use therein refrigeration agent is the hydrocarbon class refrigerant of not chloride element and fluorine element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004326215A JP2006138210A (en) | 2004-11-10 | 2004-11-10 | Hermetic electric compressor |
| JP2004326215 | 2004-11-10 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1773111A true CN1773111A (en) | 2006-05-17 |
| CN100545450C CN100545450C (en) | 2009-09-30 |
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ID=36619200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101141826A Expired - Fee Related CN100545450C (en) | 2004-11-10 | 2005-10-26 | Sealed electric compressor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2006138210A (en) |
| CN (1) | CN100545450C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101164818B1 (en) * | 2007-01-05 | 2012-07-18 | 삼성전자주식회사 | Rotary compressor and air conditioner having the same |
| JP5040488B2 (en) * | 2007-07-12 | 2012-10-03 | パナソニック株式会社 | Hermetic compressor |
| JP5503494B2 (en) * | 2010-10-21 | 2014-05-28 | 日立アプライアンス株式会社 | Hermetic compressor and refrigerator using the same |
| JP5257502B2 (en) * | 2011-11-10 | 2013-08-07 | パナソニック株式会社 | Hermetic compressor |
-
2004
- 2004-11-10 JP JP2004326215A patent/JP2006138210A/en active Pending
-
2005
- 2005-10-26 CN CNB2005101141826A patent/CN100545450C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100545450C (en) | 2009-09-30 |
| JP2006138210A (en) | 2006-06-01 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20180423 Address after: Singapore Bedok South 1 Street Patentee after: PANASONIC APPLIANCES REFRIGERATION DEVICES SINGAPORE Address before: Osaka Japan Patentee before: Matsushita Electric Industrial Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20090930 |