CN101479493B - Heat-resistant, oil resistant rolling bearing and rolling bearing for use in a compressor of a refrigerating machine - Google Patents
Heat-resistant, oil resistant rolling bearing and rolling bearing for use in a compressor of a refrigerating machine Download PDFInfo
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- CN101479493B CN101479493B CN2007800242742A CN200780024274A CN101479493B CN 101479493 B CN101479493 B CN 101479493B CN 2007800242742 A CN2007800242742 A CN 2007800242742A CN 200780024274 A CN200780024274 A CN 200780024274A CN 101479493 B CN101479493 B CN 101479493B
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Abstract
A rolling bearing having heat and oil resistance which employs a resinous cage in which a low-molecular polymer, additive, colorant, or the like remaining therein in a slight amount is prevented from being released from the resin main body and deteriorating a lubricating oil; or a rolling bearing for use in compressors for refrigerating machines which neither deteriorates a refrigerating-machine oil nor impairs the function of capillaries in a refrigeration cycle. The rolling bearing having heat and oil resistance has a cage made of one or more crystalline resins having a melting point of 280 DEG C or higher selected among a polyamide resin (polyamide-4,6, polyamide-6T, or polyamide-9T), polyphenylene sulfide, and polyether ketone. Since the cage is made of the resin having a melting point not lower than the given value, it withstands high temperatures lower than the given melting point and does not release a resin component into a liquid present outside the bearing. Because the resin is crystalline, the resin absorbs the liquid outside the bearing only in a small amount and a low-molecular polymer, additive, colorant, or the like is less apt to be released from the resin main body.
Description
Technical field
The present invention relates to heat-resisting, oil resistant rolling bearing rolling bearing etc. and so on, that under heat-resisting, the oil resistance condition that contacts with refrigerator oil, refrigeration agent etc., use of compressor used for refrigerator for example and the compressor of refrigerating machine and use rolling bearing.
Background technique
Generally speaking; The freeze cycle of refrigerating machine transmits the heat pump effect of paramount thermal source from low heat through acting and with heat; Specifically; Repeat following circulation: the so-called refrigeration agent that becomes hot move media is inhaled into compressor and is compressed being mixed with under the state of machine oil, and the gas-liquid mixed state that becomes low-temp low-pressure with the expansion valve throttling expansion is accumulated behind cistern in heat release in the condenser at HTHP after oil separates and liquefying; In vaporizer, capture the heat of refrigeration agent and gasify, be inhaled into compressor once more.
In such freeze cycle; Require compressor used for refrigerator to have tolerance and heat-resisting, the oil resistant rolling bearing that are mixed with the contacted service condition of refrigeration agent of machine oil; Also require to be used to keep the self lubricity, reagent resistance, injection moulding property etc. of retainer (being also referred to as retainer) of the rolling element of rolling bearing, and used resinous retainer in order to prolong bearing life as far as possible.
A kind of compressor of such refrigerating machine is used rolling bearing, wherein as the plastics that are used to form the retainer that keeps the rolling bearing rolling element, known heat-curing resin, polyamidoimide, polyether-ether-ketone, polyphenylene sulfide (patent documentation 1).
Patent documentation 1: the spy opens flat 5-187355 communique
Summary of the invention
Yet; The compressor of above-mentioned refrigerating machine is in the past used rolling bearing; For example be installed on the compressor of refrigerating machine and pressurized conditions at high temperature when contacting with refrigerator oil and refrigeration agent down; Exist low-molecular weight polymer, additive or the colorant etc. of minimal residue in the resin-made cage to break away from, and promote the problem of refrigerator oil deterioration from resin body.
Such problem not only takes place in refrigerating machine; And (closed-loop system especially when under high temperature condition, the resin-made cage of rolling bearing being carried out oil lubrication; The i.e. circulating oil-feeding under enclosed environment or the condition of carrying out oil bath) also can take place, low-molecular weight polymer, additive or colorant etc. can weaken the durability of lubricant oil equally.
In addition; Resin expands when having the temperature rising and absorbs oil properties; And the inner low molecular weight substance of resin, additive also actively motion and from resin inside to external moving; The material that breaks away from is separated out with suspended matter in oil, has the problem of the sludge that also can become the capillary tube (capillary tube) that blocks freeze cycle.
Therefore; Problem of the present invention is; Address the above problem; Process a kind of heat-resisting, oil resistant rolling bearing that can not make the lubricant oil deterioration; It makes that low-molecular weight polymer, additive or the colorant etc. of minimal residue can not break away from from resin body in resin-made cage, and especially a kind of compressor with refrigerating machine is processed to make with rolling bearing and also is not mixed with impurity in refrigerator oil, the refrigeration agent and prevents their deterioration, thereby the production that perhaps suppresses sludge does not hinder the compressor of refrigerating machine of the capillary function of freeze cycle to use rolling bearing yet.
In order to solve above-mentioned problem, in the present invention, process heat-resisting, oil resistant rolling bearing with the retainer that forms by the crystalline resin of fusing point more than 280 ℃.
Of the present invention heat-resisting, the oil resistant rolling bearing that constitutes as stated; Because retainer is formed by the crystalline resin more than the regulation fusing point; Therefore tolerance can not make resinous principle in the outside liquid of bearing, break away from less than the high temperature of fusing point, and owing to be crystalline resin; Therefore synthetically given play to the few characteristic of amount of the outside liquid of resin absorbing bearing, low-molecular weight polymer, additive or colorant etc. are difficult for breaking away from from the resin body as base material.Therefore, obtain can not making heat-resisting, the oil resistant rolling bearing of lubricant oil, refrigeration agent deterioration.
As the crystalline resin of such fusing point more than 280 ℃, the preferred employing is selected from the resin more than a kind in polyamide-based resin, polyphenylene sulfide and the polyether-ketone, as polyamide-based resin, preferably adopts polyamide 4-6, polyamide 6 T or polyamide 9T.
In addition, above-mentioned heat-resisting, oil resistant rolling bearing, can be well as on the compressor that is installed on refrigerating machine and with refrigerator oil and the contacted condition of refrigeration agent under the compressor of employed refrigerating machine use rolling bearing.
As stated, the compressor that obtains following refrigerating machine is used rolling bearing, promptly; The retainer tolerance can not make resinous principle in the outside liquid of bearing, break away from less than the high temperature to a certain degree of regulation fusing point, and owing to be crystalline resin; Therefore the amount of the liquid of resin-made cage absorbing bearing outside is also few; Low-molecular weight polymer, additive or colorant etc. are difficult for breaking away from from resin body, therefore can not make the refrigerator oil deterioration, also can not hinder the capillary function of freeze cycle.
The present invention is owing to process heat-resisting, the oil resistant rolling bearing with the retainer that is formed by the crystalline resin of fusing point more than 280 ℃; Therefore has following advantage; Promptly; Become low-molecular weight polymer, additive or the colorant etc. that make minimal residue in the resin-made cage and can not break away from, thereby can not make heat-resisting, the oil resistant rolling bearing of lubricant oil deterioration from resin body.
In addition; Above-mentioned heat-resisting, oil resistant rolling bearing be installed on the compressor of refrigerating machine and with refrigerator oil and the contacted condition of refrigeration agent under when using; Has following advantage; That is, do not become and can make the refrigerator oil deterioration, can not hinder the compressor of refrigerating machine of the capillary function of freeze cycle to use rolling bearing yet.
Embodiment
For example there is the rolling element of shapes such as pearl, roller, pin in heat-resisting, structure that oil resistant rolling bearing has general bearing of the present invention between interior wheel and foreign steamer, have the retainer that keeps this rolling element with rotating freely.
The not special restriction of the shape of retainer can be any one in box, wave mode, the piece type.
Such retainer is in that compressor is inner when using, not only must withstand high temperatures (for example as after the test conditions stated 140～150 ℃), high pressure (for example as after pressure 55kgf/cm the test conditions stated
2=5.39MPa) environment also must be kept chemical stability, desirable strength characteristic to various refrigeration agents, waits moulding by the crystalline resin of fusing point more than 280 ℃ through melt molding.
By after the test result stated show; The fusing point of the crystalline resin of moulding retainer is to get final product more than 280 ℃, need not its CLV ceiling limit value is limited especially, and exerting oneself for illustrating then is 280～340 ℃; When adopting PEEK in the practicality is 334 ℃, at this moment can illustrate 280～334 ℃.
The concrete example of the resin that moulding is used as retainer; Can enumerate polyamide-based resin, polyphenylene sulfide (below, PPS made in brief note) and polyether-ketone, in the polyamide-based resin; As the polyamide-based resin of fusing point more than 280 ℃, can illustration polyamide 4-6, polyamide 6 T or polyamide 9T.
Above-mentioned polyamide 4-6 is also referred to as 46 nylon, is the crystalline resin of making through the copolycondensation of diaminobutane (carbon number 4) and adipic acid (carbon number 6), and fusing point is 290 ℃.In addition, the glass transition temperature of this resin is 78 ℃, because than 66 ℃ high of 66 nylon, therefore can be described as and has stable on heating resin.As commercially available polyamide 4-6, can enumerate Dutch DSM N. V. system: Stanyl.
Polyamide 6 T is also referred to as nylon 6T, is to make through the hexamethylene diamine (carbon number 6) and the copolycondensation of terephthalic acid, and fusing point is 310～320 ℃.In order to improve moldability, can also adopt copolymerization that the modification 6T of monomer is arranged.As copolymer composition, it is 75～80 ℃ that representative has adipic acid etc., glass transition temperature at this moment.As commercially available article, can enumerate the ARLEN of Mitsui Chemicals corporate system, the AMODEL of AMOCO corporate system etc.
Polyamide 9T is also referred to as 9T nylon, is that repetitive through polymer is that carbon number is that 9 diamines is the crystalline resin that the copolycondensation of nonamethylene diamine and terephthalic acid is made, and crystallization velocity is fast, and glass transition temperature is 75～80 ℃.As the example of commercially available article, can enumerate the Genestar of KURARAY corporate system etc.
The PPS that uses among the present invention is made up of the repetitive shown in the following Chemical formula 1, especially is typically the repetitive shown in the Chemical formula 2.The glass transition temperature of such PPS is 88 ℃, and fusing point is 285 ℃.
[Chemical formula 1]
In the formula ,-ph-is:
Q is halogen or the CH of F, Cl, Br
3, m representes 1～4 integer.
[Chemical formula 2]
This resin is commercially available with the trade mark of " Layton " by U.S. Phillips Petroleum company.Layton is through in N-crassitude ketone solvent; Under 160～250 ℃, pressurized conditions, make the reaction of paracide and dithiocarbonic acids sodium and make; Heat treatment through the back operation can freely be made and from resin, not had the resin of cross bond until the various degree of polymerization with partial cross-linked key fully, can adopt the resin of suitable melt viscosity.In addition, PPS not only can adopt cross-linked structure, can also adopt the straight chain shape.In addition, the PPS resin can also use the blended polymer materials with polyamide-imide resin, as commercially available article at this moment, and " AIPolymer " that can illustration Mitsubishi Chemical Ind etc.
The polyether-ketone that uses among the present invention is the resin with structure that aromatic ring combines through ether and ketone group, can enumerate for example all aromatic polyether-ketone (PEK), all aromatic polyether-ether-ketone (PEEK) etc.
PEEK is excellent aspect heat resistance, mechanical property, self lubricity, and to reach tensile elongation in ductility be that 50% this respect is excellent, thereby is preferred, and glass transition temperature is 143 ℃, and fusing point is 334 ℃.
The example of the repetitive of the polyether-ketone that can use in the present invention is shown in following chemical formula 3.In addition, can also be to make the unit copolymerization shown in repetitive shown in the chemical formula 4 and the chemical formula 3 and the resin that obtains.
[chemical formula 3]
[chemical formula 4]
Such polyether ketone resin is crystalline resin, and under the situation of PEEK, its maximum degree of crystallinity reaches 48%.As the commercially available article of the polyether-ketone that uses among the present invention, can enumerate VICTREX-PEK220G (VICTREX corporate system), VICTREX-PEEK150P, VICTREX-PEEK380P, VICTREX-PEEK450P, HOSTATEK (Hoechst corporate system), ULTRA PEK-A1000 (BASF AG's system).
In addition; In the shaping material of the retainer of heat-resisting, oil resistant rolling bearing of the present invention, can also cooperate inorganic system such as graphite fiber, glass fibre, ceramic fiber, glass bead, glass marble, mica to add solid lubricant, anti-burning material, stabilizer, colorants such as material, graphite, PTFE resin, molybdenum disulfide etc. and add material.These can cooperate separately or two or more combinations are cooperated, and in addition, can also add material to these and impose surface treatment such as coupling processing etc.
Usually, when in resin, cooperating reinforced fiber, when cooperating 5～30 weight %, can obtain the desired result that intensity is improved.
Using not special qualification of pattern of compressor of the used for refrigerator of rolling bearing of the present invention, can be reciprocal compressor (piston type, ramp type), rotary compressor (rotation blades such as rotary-piston type, bidentate, roots-type, eddy type), the screw type known compress modes such as (single axle, twin axles) of so-called reciprocating manner.
As the refrigerator oil that uses in these refrigerating machines, can enumerate mineral oil, polyatomic alcohol polybasic alcohol ester oil (POE), polyalkylene glycol oil artificial oils such as (PAG).
In addition; As the refrigeration agent that uses in the refrigerating machine; Can be set forth in hydrogen fluorohydrocarbon (HFC) series coolant of the so-called freon class of permissible conduct alternative on the environmental problem; Be the fluorinated hydrocarbons series coolant,, can also use other known refrigeration agent as the ammonia of natural refrigeration agent, no freon, carbon dioxide, hydrocarbon, water etc.Representational refrigeration agent can be enumerated the R134a of HFC series coolant, the R600a (isobutane) of HC system etc.
Embodiment
[embodiment 1～5, comparative example 1,2]
Come the retainer of moulding rolling bearing with resin material shown in the table 1 and the composition that adds material.(I) high temperature saturating test under the bearing that obtains is provided with, (II) high temperature-high-pressure impregnation test, its result is shown in Table 1 in the lump.
In embodiment 1～5 and comparative example 1,2, the desirable strength for the retainer that obtains rolling bearing has cooperated reinforced fiber in resin, and in this test, making the use level of reinforced fiber as far as possible is same amount.Especially form for the formed body (retainer) of polyamide-based resin, the use level that makes reinforced fiber is 25%.The raw material that is shaped to retainer uses commercially available article basically; For polyamide 6 T; Process the ARLEN A315 (GF15%) and the ARLEN A335 (GF35%) that strengthen level by the glass fibre (GF) that cooperates the Mitsui Chemicals corporate system with 50:50, and the adding up to 25% composition of the use level of reinforced fiber and the formed body that forms.
[test (I): high temperature saturating test]
Under 140 ℃ heated condition; The retainer that obtains in embodiment 1～5 and the comparative example 1,2 was flooded 48 hours in the refrigerator oil of being made up of colourless POE oil (KAO. Corp. SA's system: KAOLUBE 268); Then, detect by an unaided eye having or not to suspended matter in the painted and oil of refrigerator oil.In addition, the organic system affix and the copper that add in the material of comparative example 1,2 are affix, be non-oil-soluble rerum natura and can be in oil stripping or free affix.
[test (II): high temperature and high pressure saturating test]
Use with embodiment 1～5 and comparative example 1,2 in the retainer identical materials that obtains form test film (UL-Standard 94 [12.7 * 127 * 3.2mm]).Then; Suppose with rolling bearing be installed on the compressor of refrigerating machine and with refrigerator oil and the contacted condition of refrigeration agent under the user mode used; In the refrigerator oil of forming by colourless POE oil (KAO. Corp. SA's system: KAOLUBE268) in 50%; Add 50% the system R134a of E.I.Du Pont Company as refrigeration agent, in refrigerator oil that obtains and refrigerant mixed liquid, with above-mentioned test film in 150 ℃, sealing load 5.39MPa (=55kgf/cm
2) the following dipping 72 hours of heating and pressurizing state, then, suspended matter has or not in colored state in the refrigerator oil that detects by an unaided eye, the refrigerant mixed liquid and the oil.
Table 1
Result by table 1 also shows; Refrigerator oil (test I) or the refrigerator oil and refrigerant mixed liquid (testing II) of the comparative example 1,2 that forms less than the crystalline resin of 280 ℃ (260 ℃) by fusing point have been flooded; Visual all confirm as painted; See that also suspended matter is arranged, but flooded in the refrigerator oil or refrigerator oil and refrigerant mixed liquid by the fusing point embodiment 1～5 that the crystalline resin of (285～334 ℃) forms more than 280 ℃, do not see painted and suspended matter fully.
Can know by this test result; If the crystalline resin of fusing point more than 280 ℃; When then using under pressurization, heated condition and under refrigerator oil and the contacted condition of refrigeration agent; The low-molecular weight polymer of minimal residue, additive or colorant etc. can not break away to refrigerator oil and refrigeration agent from resin body in the resin-made cage, can not make refrigerator oil or refrigerator oil and refrigerant mixed liquid deterioration as lubricant oil.
Claims (1)
1. method of the compressor of refrigerating machine being used rolling bearing; Be by have retainer and be installed on the compressor with refrigerating machine capillaceous and with refrigerator oil that forms by polyatomic alcohol polybasic alcohol ester oil or polyalkylene glycol oil and the contacted condition of refrigeration agent under the method for using of heat-resisting, the oil resistant rolling bearing that uses; Said retainer by have the low-molecular weight polymer that prevents minimal residue in the resin or additive break away from character to refrigeration agent or the refrigerator oil, the crystalline resin of fusing point more than 280 ℃ form; Wherein, crystalline resin is polyamide 4-6.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP180792/2006 | 2006-06-30 | ||
| JP2006180792 | 2006-06-30 | ||
| JP167096/2007 | 2007-06-26 | ||
| JP2007167096A JP2008032218A (en) | 2006-06-30 | 2007-06-26 | Heat/oil resistant rolling bearing and compressor rolling bearing for refrigerator |
| PCT/JP2007/063098 WO2008001887A1 (en) | 2006-06-30 | 2007-06-29 | Rolling bearing with heat and oil resistance and rolling bearing for compressor in refrigerating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101479493A CN101479493A (en) | 2009-07-08 |
| CN101479493B true CN101479493B (en) | 2012-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007800242742A Expired - Fee Related CN101479493B (en) | 2006-06-30 | 2007-06-29 | Heat-resistant, oil resistant rolling bearing and rolling bearing for use in a compressor of a refrigerating machine |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2009144928A (en) |
| CN (1) | CN101479493B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2701034A1 (en) | 2007-09-27 | 2009-04-02 | Massachusetts Institute Of Technology | Cell rolling separation |
| JP5615649B2 (en) * | 2010-09-28 | 2014-10-29 | Ntn株式会社 | Ball bearing |
| CN101949412A (en) * | 2010-10-18 | 2011-01-19 | 无锡华洋滚动轴承有限公司 | Heat resistant polyamide bearing retainer |
| JP6093675B2 (en) * | 2013-09-04 | 2017-03-08 | 出光ライオンコンポジット株式会社 | Resin composition for sliding member |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0988967A (en) * | 1995-09-29 | 1997-03-31 | Ntn Corp | Pulley and ball bearing therefor |
| JP2002242940A (en) * | 2001-02-16 | 2002-08-28 | Denso Corp | Thrust bearing |
| JP4161563B2 (en) * | 2001-10-31 | 2008-10-08 | 三菱電機株式会社 | Functional parts, manufacturing method thereof, and refrigeration air conditioner using the same. |
| JP4457816B2 (en) * | 2004-09-07 | 2010-04-28 | 日本精工株式会社 | Rolling bearing unit and method for manufacturing the rolling bearing unit cage |
-
2007
- 2007-06-29 CN CN2007800242742A patent/CN101479493B/en not_active Expired - Fee Related
-
2009
- 2009-03-30 JP JP2009081989A patent/JP2009144928A/en active Pending
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| Publication number | Publication date |
|---|---|
| CN101479493A (en) | 2009-07-08 |
| JP2009144928A (en) | 2009-07-02 |
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