WO2008001887A1 - palier à roulement ayant une résistance à la chaleur et à l'huile et palier à roulement pour un compresseur dans une machine réfrigérante - Google Patents
palier à roulement ayant une résistance à la chaleur et à l'huile et palier à roulement pour un compresseur dans une machine réfrigérante Download PDFInfo
- Publication number
- WO2008001887A1 WO2008001887A1 PCT/JP2007/063098 JP2007063098W WO2008001887A1 WO 2008001887 A1 WO2008001887 A1 WO 2008001887A1 JP 2007063098 W JP2007063098 W JP 2007063098W WO 2008001887 A1 WO2008001887 A1 WO 2008001887A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin
- oil
- rolling bearing
- heat
- polyamide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/46—Cages for rollers or needles
- F16C33/56—Selection of substances
-
- 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
Definitions
- the present invention relates to a heat resistance such as a rolling bearing of a compressor for a refrigerator, which is in contact with a refrigerator oil or a refrigerant, etc. * heat resistance used under oil resistance conditions * oil resistance rolling bearing cage and refrigeration
- the present invention relates to a rolling bearing for a compressor of a machine.
- the refrigeration cycle of a refrigerator fulfills the action of a heat pump that spends work to carry heat from a low heat source to a high heat source, and specifically, a so-called refrigerant power machine oil that serves as a heat transfer medium.
- a so-called refrigerant power machine oil that serves as a heat transfer medium.
- it In a mixed state, it is sucked into the compressor, compressed, separated into oil, radiated and liquefied by a high-temperature and high-pressure condenser, stored in the receiver, and then throttled and expanded by an expansion valve.
- it becomes a gas-liquid mixed state it takes the heat of the refrigerant and vaporizes it in the evaporator, and when it is sucked into the compressor again, it repeats the drought cycle.
- a compressor for a refrigerator is required to have a heat-resistant and oil-resistant rolling bearing that can withstand the use conditions in contact with a refrigerant mixed with machine oil.
- a retainer also called a retainer
- a retainer is required to have self-lubricating properties, chemical resistance, and injection moldability, as well as those made of resin to extend the bearing life as much as possible. in use.
- a rolling bearing for a compressor of such a refrigerator which is a plastic that forms a cage for holding the rolling element of the rolling bearing, such as thermosetting resin, polyamideimide, polyether ether ketone, polyphenol Rensulfide is known (Patent Document 1).
- Patent Document 1 Japanese Patent Laid-Open No. 5-187355
- the conventional rolling bearing for a compressor of a refrigerator is attached to the compressor of the refrigerator and contacts a refrigerator oil and a refrigerant under a high-temperature pressurizing condition.
- Low molecular weight polymers, additives, or colorants that remain in trace amounts in the resin body There is a problem that the power is disengaged and the deterioration of the refrigerating machine oil is promoted.
- Such problems are not limited to refrigerators, but when lubricating oil bearing cages of rolling bearings under high temperature conditions (especially in closed-loop systems, that is, circulating oil or oil bath conditions in a closed environment) In the same way, low molecular weight polymers, additives, or colorants also reduce the durability of lubricating oils.
- the resin has a property of expanding and absorbing oil, and low molecular weight substances and additives inside the resin also actively move to move outside the resin and move away. There is a problem that the resulting product precipitates in the oil as suspended matter and becomes sludge that clogs the capillaries (capillary tubes) of the refrigeration cycle.
- the object of the present invention is to solve the above-described problems, and a low molecular weight polymer, an additive, or a colorant remaining in a small amount in a cage made of resin is separated from the power of the resin main body.
- the heat-resistant and oil-resistant rolling bearings that do not degrade the lubricating oil, especially the rolling bearings for the compressor of the refrigerator are deteriorated by preventing the impurities in the refrigerant of the refrigerator oil.
- rolling bearings for compressors of refrigerators that prevent sludge generation and prevent the function of capillaries in the refrigeration cycle.
- a heat-resistant and oil-resistant rolling bearing provided with a cage made of a crystalline resin having a melting point of 280 ° C or higher is provided.
- the cage is made of crystalline resin having a melting point equal to or higher than a predetermined melting point.
- the characteristic that the resin absorbs a small amount of liquid outside the bearing acts comprehensively, and low molecular weight polymers and additives or It is difficult to remove the main body of the resin which is a base material such as a colorant. For this reason, it will be a heat and oil resistant rolling bearing that does not degrade the lubricating oil or refrigerant.
- a crystalline resin having a melting point of 280 ° C or higher it is preferable to employ one or more kinds of resins selected from polyamide-based resin, polysulfide sulfide and polyether ketone power.
- Polyamide 46, polyamide 6T or polyamide 9T is preferably used as the system resin.
- the heat-resistant and oil-resistant rolling bearing described above is applicable to a compressor rolling bearing for a refrigerator that is attached to a compressor of a refrigerator and is used under the condition of contacting with the refrigerator oil and refrigerant. is there.
- the cage is a crystalline resin that can withstand a certain high temperature below a predetermined melting point and does not allow the liquid component outside the bearing to separate the resin component.
- Low molecular weight polymers, additives, or colorants that absorb the body in a small amount are not easily released from the main body of the resin, so the refrigeration cycle capillaries do not degrade the refrigerating machine oil. It becomes a rolling bearing for a compressor of a refrigerator that does not interfere with the function of.
- the present invention is a heat-resistant and oil-resistant rolling bearing having a cage made of crystalline resin having a melting point of 280 ° C or higher, a low molecular weight polymer that remains in a trace amount in a resin-made cage As a result, heat and oil-resistant rolling bearings that do not deteriorate the lubricating oil are prevented by preventing the release of additives, additives, or coloring agents.
- the above heat-resistant and oil-resistant rolling bearing is used in a refrigeration cycle without degrading the refrigerating machine oil when used in a condition where it is attached to the refrigerating machine compressor and is in contact with the refrigerating machine oil and refrigerant.
- the heat and oil resistant rolling bearing of the present invention has a general bearing structure.
- a rolling element having a shape of a ball, a roller, a needle or the like is interposed between an inner ring and an outer ring. It has a cage that holds it rotatably.
- the shape of the cage is not particularly limited, and may be any of a box shape, a wave shape, and a block shape.
- the melting point of the crystalline resin forming the cage is preferably 280 ° C or higher, and it is not particularly meaningful to limit the upper limit. If it is shown, it is 280 to 340 ° C, and practically it is 334 ° C when PEEK is adopted, and in this case, it can indicate 280 to 334 ° C.
- the resin for molding the cage include polyamide-based resin, polyphenylene sulfide (hereinafter abbreviated as PPS), and polyether ketone.
- PPS polyphenylene sulfide
- polyether ketone the melting point is 280.
- columns above ° C indicate polyamide 4 6, polyamide 6T or polyamide 9 T in column f.
- the above-mentioned polyamide 4 6 is also referred to as 46 nylon, and is a crystalline resin manufactured by a copolycondensation reaction of diaminobutane (carbon number 4) and adipic acid (carbon number 6), and has a melting point of 2 90 ° C.
- the glass transition point of this resin is 78 ° C, which is higher than 66 ° C of 66 nylon, so it can be said that it has heat resistance.
- Commercially available polyamide 4-6 includes Stanyl, manufactured by DSM, The Netherlands.
- Polyamide 6T is also referred to as nylon 6T, and is produced by a copolycondensation reaction of hexamethylenediamine (carbon number 6) and terephthalic acid, and has a melting point of 310 to 320 ° C. is there .
- modified 6T obtained by copolymerizing monomers can also be used.
- a typical example of the copolymerization component is adipic acid. In this case, the glass transition temperature is 75 to 80 ° C.
- Examples of commercial products include Aalen manufactured by Mitsui Engineering Co., Ltd. and Amodel manufactured by Amoko.
- Polyamide 9T is also referred to as 9T nylon, and is a crystalline resin produced by a copolycondensation reaction of nonanediamine having a polymer repeating unit of 9 carbon atoms and terephthalic acid.
- the glass transition temperature is 75-80 ° C.
- a commercial product there is a dienesta made of Kurarene soil.
- the PPS used in the present invention also has a repeating unit force represented by the following chemical formula 1, and a typical one represented by the chemical formula 2 is typical.
- Such PPS has a glass transition temperature of 88 ° C and a melting point of 285 ° C.
- Q is F, C and halogen of Br or C ⁇ 3 , and m is an integer of 1 to 4.
- This rosin is marketed under the trademark "Ryton” by Philips Petroleum, USA.
- Ryton is produced by reacting p-dichlorobenzene with disulfuric acid soda in N-methylpyrrolidone solvent at 160-250 ° C under pressure, without any cross-linking in the resin. From a product having a partial cross-linkage, those having various degrees of polymerization can be freely produced by a post-treatment heat treatment, and those having an appropriate melt viscosity can be adopted.
- the PPS may be a straight chain having a cross-linked structure.
- the PPS resin it is also possible to use a polymer alloy material with polyamide imide resin, and examples of commercially available products in this case include “AI polymer” manufactured by Mitsubishi Chemical Corporation.
- the polyether ketone used in the present invention is a resin having a structure in which an aromatic ring is bonded with an ether group and a ketone group.
- a wholly aromatic polyether ketone (PEK) or a wholly aromatic polyether ether examples include ketones (PEEK).
- PEEK is excellent in heat resistance, mechanical properties, and self-lubricity, and has a glass transition temperature of 143 ° C and a melting point of 334 °, which are preferable in terms of excellent flexibility at 50% tensile elongation. C.
- a repeating unit of polyether ketone that can be used in the present invention is shown in the following chemical formula 3. Further, it may be a rosin obtained by copolymerizing a repeating unit represented by Chemical Formula 4 with a unit represented by Chemical Formula 3. [0032] [Chemical 3]
- Such a polyetherketone resin is V, both of which are crystalline resin, and in the case of PEEK, its maximum crystallinity reaches 48%.
- Polyetherketone products used in this invention include VICTREX—PEK220G (Vitatrex), VICTREX—PEEK15 OP 380P, 450P, HOSTATEK (Hekist), ULTRA PEK—A1000 (BASF) Manufactured).
- the molding material of the cage of the heat-resistant and oil-resistant rolling bearing of the present invention includes carbon fiber, glass fiber, ceramic fiber, glass bead, glass balloon, inorganic power additive such as my strength, black ship, Additives such as solid lubricants such as PTFE resin and disulfurium molybdenum, metal antioxidants, stabilizers, and colorants may be added. These may be blended singly or in combination of two or more, and these additives may be subjected to a surface treatment such as a coupling treatment.
- a blending amount of 5 to 30% by weight can provide a favorable result for improving the strength.
- the type of the compressor for the refrigerator in which the rolling bearing of the present invention is used is particularly limited.
- Reciprocating type reciprocating compressors (piston type, swash plate type), rotary compressors (rotary piston type, double tooth rotary vanes, roots type, scroll type), screw type (single axis type, twin axis type) It may be a well-known compression method.
- refrigerator oil used in these refrigerators examples include synthetic oils such as mineral oil, polyol ester oil (PO E), and polyalkylene glycol oil (PAG).
- synthetic oils such as mineral oil, polyol ester oil (PO E), and polyalkylene glycol oil (PAG).
- the refrigerant used in the refrigerator is a so-called substitute fluorocarbon (HFC) refrigerant, that is, a fluorinated hydrocarbon refrigerant or a natural refrigerant, which is a so-called alternative fluorocarbon that is accepted due to environmental problems.
- HFC substitute fluorocarbon
- Non-fluorocarbons include ammonia, carbon dioxide, hydrocarbons, water and the like, and other known refrigerants may be used.
- Typical refrigerants include HFC refrigerant R134a and HC R600a (isobutane).
- Roller bearing cages were formed from the composition of the resin material and additives shown in Table 1. The obtained bearings were subjected to the following (I) high temperature immersion test and (II) high temperature / high pressure immersion test, and the results are also shown in Table 1.
- the reinforcing fiber was blended in the resin to obtain the required strength of the rolling bearing cage, but the blending amount of the reinforcing fiber was the same as possible in this test. In quantity. In particular, with regard to the composition (retainer) of polyamide-based resin, the amount of reinforcing fiber was 25%.
- the material used to mold the cage is basically a commercially available product, but for Polyamide 6T, glass fiber (GF) reinforced grades of Allen A315 (GF15%) and A335 (GF35) manufactured by Mitsui Chemicals, Inc. %) was blended at 50:50 to obtain a molded product having a compositional power of 25% in the total amount of reinforcing fibers.
- refrigeration oil (Test I) or refrigeration oil in which Comparative Examples 1 and 2 comprising crystalline rosin having a melting point of less than 280 ° C (260 ° C) were soaked Refrigerant mixture (Test ⁇ ) was visually recognized as being colored, and suspended solids were observed.
- Examples 1 to 5 consisting of crystalline rosin having a melting point of 280 ° C or higher (285 to 334 ° C) In the refrigerating machine oil or the refrigerating machine oil / refrigerant mixture soaked, no coloring or suspended matter was observed.
- a crystalline resin having a melting point of 280 ° C or higher can be used when it is used under the condition of being in contact with the refrigerating machine oil and the refrigerant in a pressurized and heated state.
- Low molecular weight polymers, additives, or colorants that remain in trace amounts are not separated into the refrigerating machine oil and refrigerant from the main body of the resin, and the refrigerating machine oil or refrigerating machine oil / refrigerant mixture that is the lubricating oil is not It turns out that it does not deteriorate.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Compressor (AREA)
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007800242742A CN101479493B (zh) | 2006-06-30 | 2007-06-29 | 耐热、耐油性滚动轴承以及冷冻机的压缩机用滚动轴承 |
| US12/227,644 US20090129716A1 (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 |
| DE112007001488T DE112007001488T5 (de) | 2006-06-30 | 2007-06-29 | Wärmebeständiges, ölbeständiges Wälzlager und Wälzlager zur Verwendung bei einem Kompressor einer Kältemaschine |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-180792 | 2006-06-30 | ||
| JP2006180792 | 2006-06-30 | ||
| JP2007-167096 | 2007-06-26 | ||
| JP2007167096A JP2008032218A (ja) | 2006-06-30 | 2007-06-26 | 耐熱・耐油性転がり軸受および冷凍機の圧縮機用転がり軸受 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008001887A1 true WO2008001887A1 (fr) | 2008-01-03 |
Family
ID=38845650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/063098 Ceased WO2008001887A1 (fr) | 2006-06-30 | 2007-06-29 | palier à roulement ayant une résistance à la chaleur et à l'huile et palier à roulement pour un compresseur dans une machine réfrigérante |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20090129716A1 (ja) |
| JP (1) | JP2008032218A (ja) |
| DE (1) | DE112007001488T5 (ja) |
| WO (1) | WO2008001887A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10275709B2 (en) | 2015-09-30 | 2019-04-30 | Fotonation Limited | Method and system for tracking an object |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5615649B2 (ja) * | 2010-09-28 | 2014-10-29 | Ntn株式会社 | 玉軸受 |
| US9605677B2 (en) | 2012-07-23 | 2017-03-28 | Emerson Climate Technologies, Inc. | Anti-wear coatings for scroll compressor wear surfaces |
| CN104662300B (zh) | 2012-07-23 | 2018-01-26 | 艾默生环境优化技术有限公司 | 用于压缩机的注入模制密封件 |
| DE102014222283A1 (de) * | 2014-10-31 | 2016-05-04 | Aktiebolaget Skf | Kunststoffaufweisender selbstschmierender Lagerkäfig |
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| JPH11108064A (ja) * | 1997-09-30 | 1999-04-20 | Ntn Corp | ころがり軸受用保持器 |
| JP2005090657A (ja) * | 2003-09-18 | 2005-04-07 | Nsk Ltd | 転がり軸受用保持器及び該保持器を組み込んだ転がり軸受 |
| JP2005256893A (ja) * | 2004-03-10 | 2005-09-22 | Nsk Ltd | ターボチャージャ用転がり軸受 |
| JP2006077804A (ja) * | 2004-09-07 | 2006-03-23 | Nsk Ltd | 転がり軸受ユニット及び前記転がり軸受ユニット用保持器の製造方法 |
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2007
- 2007-06-26 JP JP2007167096A patent/JP2008032218A/ja active Pending
- 2007-06-29 WO PCT/JP2007/063098 patent/WO2008001887A1/ja not_active Ceased
- 2007-06-29 DE DE112007001488T patent/DE112007001488T5/de not_active Withdrawn
- 2007-06-29 US US12/227,644 patent/US20090129716A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05187355A (ja) * | 1992-01-10 | 1993-07-27 | Hitachi Ltd | 冷凍機用圧縮機の転がり軸受とそれを用いた冷凍機用圧縮機 |
| JPH11108064A (ja) * | 1997-09-30 | 1999-04-20 | Ntn Corp | ころがり軸受用保持器 |
| JP2005090657A (ja) * | 2003-09-18 | 2005-04-07 | Nsk Ltd | 転がり軸受用保持器及び該保持器を組み込んだ転がり軸受 |
| JP2005256893A (ja) * | 2004-03-10 | 2005-09-22 | Nsk Ltd | ターボチャージャ用転がり軸受 |
| JP2006077804A (ja) * | 2004-09-07 | 2006-03-23 | Nsk Ltd | 転がり軸受ユニット及び前記転がり軸受ユニット用保持器の製造方法 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10275709B2 (en) | 2015-09-30 | 2019-04-30 | Fotonation Limited | Method and system for tracking an object |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112007001488T5 (de) | 2009-05-07 |
| JP2008032218A (ja) | 2008-02-14 |
| US20090129716A1 (en) | 2009-05-21 |
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