CN1136390C - 冷冻机用压缩机的轴承及冷冻机用压缩机 - Google Patents
冷冻机用压缩机的轴承及冷冻机用压缩机 Download PDFInfo
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- F05C2201/00—Metals
- F05C2201/04—Heavy metals
- F05C2201/0469—Other heavy metals
- F05C2201/0475—Copper or alloys thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2360/00—Engines or pumps
- F16C2360/42—Pumps with cylinders or pistons
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
将多孔质青铜系合金(1b)和含浸在多孔质青铜系合金(1b)的孔内的树脂材料(1c)形成在里衬金属(1b)上并构成轴承(1)。在与曲轴(5)的接触面中稀疏地露出有多孔质青铜系合金(1b)和树脂材料(1c)。且接触面(1d)中多孔质青铜系(1b)的露出面积的比例在5%以上和60%以下。由此能获得临界润滑时的发热胶着耐力大且滑动磨耗量少的冷冻机用压缩机的轴承及具有这种轴承的冷冻机用压缩机。
Description
技术领域
本发明涉及冷冻机用压缩机的轴承及冷冻机用压缩机。
背景技术
以往作为冷冻机用压缩机的制冷剂系采用CFC(含氯氟烃)或HCFC(氢含氯氟烃)。然而近年来,为防止由于这些CFC、HCFC中所含的氯破坏臭氧层,正在采用不含氯的HFC(氢氟烃)作为替代制冷剂。
随着制冷剂的改变,必须改变冷冻机用压缩机的轴承材料。其原因是由于以往轴承上所用的含Al(铝)材料易被作为替代制冷剂的HFC腐蚀。因此正在考虑采用含青铜的材料等作为轴承的材料。作为将含青铜的材料用于轴承的技术例如有日本专利特开昭59-194128号公报。
在上述公报中揭示了一种将浸含由合成树脂和润滑剂构成的复合物质的多孔质青铜系合金烧结在里衬金属上形成的冷冻机用压缩机的轴承。而且,这种轴承形成为该多孔质青铜系合金和复合物质两方稀疏地露出在与轴的接触面中。
然而,在上述公报中对于与轴的接触面中的多孔质青铜系合金的露出比例则并未揭示。因此,在上述公报的轴承中存在由于在临界润滑时等的发热胶着耐力降低而产生发热胶着,并存在由于滑动引起的磨耗量增加而使轴承间隙变大并产生翘曲、发热胶着等损伤的问题。
发明概况
本发明的目的在于提供一种临界润滑时等的发热胶着耐力大、由于滑动引起的磨耗量少的冷冻机用压缩机的轴承及具有该轴承的冷冻机用压缩机。
本申请的发明人经深入研究发现,在冷冻机用压缩机的轴承中,通过改变在与轴的接触面(滑动面)中的多孔质青铜系合金的露出比例,耐发热胶着性及耐磨耗性即变化。另外,本申请的发明人还发现,通过使该露出比例控制在预定范围内,即能得到同时满足适于冷冻机用压缩机的轴承的耐发热胶着性及耐磨耗性的轴承。
因此,本发明的冷冻机用压缩机的轴承中具有多孔质青铜系合金和含浸在多孔质青铜系合金的孔内的树脂材料,滑动面中露出有多孔质青铜系合金和树脂材料,且滑动面中多孔质青铜系合金的露出面积的比例在5%以上和60%以下。
在本发明的冷冻机用压缩机的轴承中,滑动面中多孔质青铜系合金的露出面积的比例在5%以上和60%以下,如不满5%则滑动磨耗量大大增加,而一旦超过60%则发热胶着耐力急剧降低且易于产生发热胶着。由此能获得临界润滑时等的发热胶着耐力大、由滑动引起的磨耗量少的冷冻机用压缩机的轴承。
另外,在采用多孔质青铜系合金的情况下,青铜系合金对于替代制冷剂难以腐蚀,且由于青铜系合金的热传导率高,故能防止轴承发热胶着。而且在青铜系合金为多孔质的情况下,由于树脂进入孔内而使青铜系合金与里衬金属牢固结合,以防止滑动时青铜系合金因摩擦而洒落。还有,由于只有青铜系合金的情况下容易产生发热胶着,而采用树脂材料能防止轴承发热胶着。
而且,最好使多孔质青铜系合金和树脂材料稀疏地露出在与轴的接触面中。由此能尽量均匀地发挥青铜系合金的耐磨耗性和树脂材料的耐发热胶着性的效果。
另外,在本说明书中所说的多孔质青铜系合金是指在铜与锡的合金的青铜中含有多孔质的材料,包括仅由多孔质青铜组成的材料及除多孔质青铜外还包含其它物质的材料。
在上述冷冻机用压缩机的轴承中,滑动面中多孔质青铜系合金的露出面积的比例最好在5%以上和30%以下。
滑动面中多孔质青铜系合金的露出面积的比例为30%以下时,在该范围中能获得最大的耐发热胶着性的效果。
在上述冷冻机用压缩机的轴承中,最好还具有里衬且里衬上形成有多孔质青铜系合金和树脂材料。
由此,由于树脂进入多孔质青铜系合金的孔内而能使青铜系合金与里衬金属牢固结合,故能防止滑动时青铜系合金因摩擦而洒落。
在上述冷冻机用压缩机的轴承中,由冷冻机用压缩机加以压缩的制冷剂最好为不含氯的HFC系的替代制冷剂。
通过采用这种替代制冷剂,能防止臭氧层的破坏,而且在采用这种替代制冷剂的情况下,本发明的轴承难以腐蚀。
在上述冷冻机用压缩机的轴承中,树脂材料最好包含由合成树脂和润滑剂组成的复合物质。
由此,能根据各种使用状况适当选择树脂材料。
在上述冷冻机用压缩机的轴承中,最好是合成树脂含有四氟乙烯,润滑剂含有铅。
由此,能适当地选择合成树脂的材质,而铅则使润滑性提高。
在上述冷冻机用压缩机的轴承中,树脂材料最好是含有含油聚缩醛树脂。
由此,能适当地选择树脂材料。
本发明的冷冻机用压缩机中包括:具有可动涡旋件的涡旋式压缩部件,用于将驱动力传递到可动涡旋件的驱动轴,配置在驱动轴的滑动部的轴承,该轴承包括多孔质青铜系合金和含浸在多孔质青铜系合金的孔内的树脂材料,滑动面中露出有多孔质青铜系合金和树脂材料,且滑动面中多孔质青铜系合金的露出面积的比例在5%以上和60%以下。
由此,能获得具有临界润滑时等的发热胶着耐力大、且由于滑动引起的磨耗量小的轴承的冷冻机用压缩机。
在上述冷冻机用压缩机中,轴承最好为配置在可动涡旋件和驱动轴的滑动部中的滑动轴承。
由此,能在可动涡旋件和驱动轴的滑动部中增大临界润滑时等的发热胶着耐力,同时能减小由于滑动引起的磨耗量。
在上述冷冻机用压缩机中,轴承最好为配置在壳体和驱动轴的滑动部中的滑动轴承。
由此,能在壳体和驱动轴的滑动部中增大临界润滑时等的发热胶着耐力,同时能减小由于滑动引起的磨耗量。
在上述冷冻机用压缩机中,最好为具有能从设于驱动轴上的给油用孔将油供给轴承的结构。
如上所述,采用本发明的轴承能增大发热胶着耐力,并减小由于滑动引起的磨耗量。因此即使在向轴承部的给油一时恶化而成为临界润滑状态的情况下也能防止发热胶着和磨耗,从而适用于具有上述给油路径的冷冻机用压缩机。
附图简单说明
图1为部分地示出本发明的一实施形态的冷冻机用压缩机的构成的概略剖面图。
图2为示出滑动轴承的剖面结构的图。
图3为示出与曲轴的接触面中青铜露出率与发热胶着面压力的关系的图。
图4为示出与曲轴的接触面中青铜露出率与磨耗量的关系的图。
图5为示出将滑动轴承配置在壳体与曲轴的滑动部的状态的概略剖面图。
实施本发明的最佳形态
以下根据附图说明本发明的实施形态。
参照图1,在密闭容器20内主要配设有马达(未图示)和压缩部件CF。
在与马达的转子(未图示)连接的曲轴5的上端部设有对于曲轴5偏心的偏心部5a,在该偏心部5a中嵌设有圆筒状的滑动衬套3。该滑动衬套3被装入可动涡旋件11的轮毂部11b内。而且安装在轮毂部11b的内周面上的滑动轴承1的内周面与滑动衬套3的外周面构成滑动部。由此将曲轴5的驱动力经滑动衬套3传递到可动涡旋件11而使可动涡旋件11公转。
由于该可动涡旋件11公转,由可动涡旋件11和固定涡旋件13的各涡旋状齿部11a、13a构成的压缩室从涡旋的外周侧向内周侧一面渐渐减少体积一面移动。由此将压缩室中的制冷剂气体渐渐压缩并至最内周的压缩室而从排出口排出。
另外,在曲轴5上设有从冷冻机用压缩机的下方(未图示)通至偏心部5a的端面的给油用孔5b。通过该给油用孔5b将油从冷冻机用压缩机的下方的油槽导至偏心部5a的端面后,再供给滑动轴承1和滑动衬套3的滑动部。
其次对图1中的滑动轴承1的构成作具体说明。
参照图2,滑动轴承1具有里衬1a、多孔质青铜1b、树脂1c。里衬1a上形成有多孔质青铜1b和含浸在该多孔质青铜1b的孔内的树脂1c。在与滑动衬套3的接触面(滑动面)1d上稀疏地露出有多孔质青铜1b和树脂1c。而且多孔质青铜1b在接触面1d上的露出面积的比例最好在5%以上和60%以下。
本申请发明人采用图1和图2所示的冷冻机用压缩机对在使青铜露出面积的比例(露出率)变化情况下轴承面压强与磨耗量进行了测定。其结果如图3和图4所示。
首先参照图3,可知当青铜的露出率提高时轴承面压强降低。尤其是当青铜的露出率超过60%时,轴承面压强降低到3MPa的程度,故容易发生发热胶着。而当青铜的露出率在30%以下时,轴承面压强能大大提高到10MPa的程度,故能获得耐发热胶着性的最大效果。
其次,参照图4,可知当青铜的露出率提高时能减少磨耗量。当青铜的露出率不满5%时,磨耗量急剧增加。
根据上述图3和图4的结果,可知当青铜的露出面积的比例在5%以上和60%以下时,能获得耐发热胶着性和耐磨耗性两方面均优的冷冻机用压缩机的轴承。而当青铜的露出率在5%以上和30%以下时,能获得耐发热胶着性更好的冷冻机用压缩机的轴承。
由于本实施形态的滑动轴承1在耐发热胶着性和耐磨耗性两方面均优,故特别适用于如图1所示那样通过给油用孔5b将油供至滑动轴承1与滑动衬套3的滑动部上构成的冷冻机用压缩机。
另外,在本实施形态中虽然是采用多孔质青铜1b,但并不限于多孔质青铜1b,也可采用含多孔质青铜的材质,就是说也可采用多孔质青铜系合金。另外,在本实施形态中虽然是采用树脂1c,但也可在该部分1c采用含树脂的材料,例如也可采用由合成树脂和润滑剂组成的复合物质,另外也可采用含有PTFE(聚四氟乙烯)和铅的材质。在这种场合,铅起提高润滑性的作用。另外,树脂1c的材质也可含有含油聚缩醛树脂。
另外,在图1的结构中,虽然为了通过上部壳体7支承曲轴5而采用滚动轴承9,但也可如图5所示那样采用由里衬金属1a、多孔质青铜1b和树脂1 c组成的图2所示构成的滑动轴承1来代替滚动轴承9。另外,虽然在图1中未示出,但在下部壳体与曲轴5之间也可采用图2所示构成的滑动轴承。
另外,在图1的结构中,虽然作为压缩部件CF对于涡旋式作了说明,但压缩部件并不限于此,只要是能用于冷冻机的压缩机任何结构均可。
上述实施形态中所述各点仅为示例而并不构成限定。本发明的范围并非上述说明,而由权利要求的范围示出,并应包含与权利要求的范围均等意义及范围内的一切变更。
工业上应用的可能性
本发明能有利地适用于要求耐发热胶着性和耐磨耗性的冷冻机用压缩机的轴承及具有这种轴承的冷冻机用压缩机。
Claims (11)
1.一种冷冻机用压缩机的轴承(1),具有多孔质青铜系合金(1b)和含浸在所述多孔质青铜系合金(1b)的孔内的树脂材料(1c),其特征在于,滑动面(1d)中露出有所述多孔质青铜系合金(1b)和所述树脂材料(1c),且所述滑动面(1d)中所述多孔质青铜系合金(1b)的露出面积的比例在5%以上和60%以下。
2.如权利要求1所述的冷冻机用压缩机的轴承,其特征在于,所述滑动面(1d)中所述多孔质青铜系合金(1b)的露出面积的比例在5%以上和30%以下。
3.如权利要求1所述的冷冻机用压缩机的轴承,其特征在于,还具有里衬(1a),且所述里衬(1a)上形成有所述多孔质青铜系合金(1b)和所述树脂材料(1c)。
4.如权利要求1所述的冷冻机用压缩机的轴承,其特征在于,由所述冷冻机用压缩机加以压缩的制冷剂为不含氯的HFC系的替代制冷剂。
5.如权利要求1所述的冷冻机用压缩机的轴承,其特征在于,所述树脂材料(1c)包含由合成树脂和润滑剂组成的复合物质。
6.如权利要求5所述的冷冻机用压缩机的轴承,其特征在于,所述合成树脂含有聚四氟乙烯,所述润滑剂含有铅。
7.如权利要求1所述的冷冻机用压缩机的轴承,其特征在于,所述树脂材料(1C)包含含油聚缩醛树脂。
8一种冷冻机用压缩机,包括:
具有可动涡旋件(11)的涡旋式压缩部件(CF),
用于将驱动力传递到所述可动涡旋件(11)的驱动轴(5),
配置在与所述驱动轴(5)的滑动部的轴承(1),
其特征在于,所述轴承(1)包括多孔质青铜系合金(1b)和含浸在所述多孔质青铜系合金(1b)的孔内的树脂材料(1c),所述滑动面(1d)中露出有所述多孔质青铜系合金(1b)和所述树脂材料(1c),且所述滑动面(1d)中所述多孔质青铜系合金(1b)的露出面积的比例在5%以上和60%以下。
9.如权利要求8所述的冷冻机用压缩机,其特征在于,所述轴承(1)为配置在所述可动涡旋件(11)和所述驱动轴(5)的滑动部中的滑动轴承。
10.如权利要求8所述的冷冻机用压缩机,其特征在于,所述轴承(1)为配置在壳体(7)和所述驱动轴(5)的滑动部中的滑动轴承。
11.如权利要求8所述的冷冻机用压缩机,其特征在于,具有能从设于所述驱动轴(5)上的给油用孔(5b)将油供给所述轴承(1)的结构。
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JP214018/1998 | 1998-07-29 | ||
JP21401898 | 1998-07-29 |
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CN1273625A CN1273625A (zh) | 2000-11-15 |
CN1136390C true CN1136390C (zh) | 2004-01-28 |
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US (1) | US6416851B1 (zh) |
EP (3) | EP1020642B1 (zh) |
JP (1) | JP3823325B2 (zh) |
KR (1) | KR100496214B1 (zh) |
CN (1) | CN1136390C (zh) |
ES (2) | ES2605399T3 (zh) |
WO (1) | WO2000006902A1 (zh) |
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- 1999-07-23 US US09/446,483 patent/US6416851B1/en not_active Expired - Lifetime
- 1999-07-23 ES ES99931530.2T patent/ES2605399T3/es not_active Expired - Lifetime
- 1999-07-23 EP EP99931530.2A patent/EP1020642B1/en not_active Expired - Lifetime
- 1999-07-23 WO PCT/JP1999/003981 patent/WO2000006902A1/ja active IP Right Grant
- 1999-07-23 JP JP56298799A patent/JP3823325B2/ja not_active Expired - Lifetime
- 1999-07-23 ES ES10181963T patent/ES2704001T3/es not_active Expired - Lifetime
- 1999-07-23 KR KR10-2000-7001927A patent/KR100496214B1/ko not_active IP Right Cessation
- 1999-07-23 EP EP10181963.9A patent/EP2278166B1/en not_active Expired - Lifetime
- 1999-07-23 EP EP07015043A patent/EP1845261A3/en not_active Ceased
- 1999-07-23 CN CNB99801091XA patent/CN1136390C/zh not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
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JP3823325B2 (ja) | 2006-09-20 |
EP1020642A4 (en) | 2004-05-12 |
EP1845261A2 (en) | 2007-10-17 |
KR20010023293A (ko) | 2001-03-26 |
KR100496214B1 (ko) | 2005-06-21 |
WO2000006902A1 (fr) | 2000-02-10 |
CN1273625A (zh) | 2000-11-15 |
EP2278166A8 (en) | 2012-03-07 |
ES2605399T3 (es) | 2017-03-14 |
EP1845261A3 (en) | 2008-06-11 |
EP1020642A1 (en) | 2000-07-19 |
EP2278166B1 (en) | 2018-12-05 |
US6416851B1 (en) | 2002-07-09 |
EP2278166A2 (en) | 2011-01-26 |
ES2704001T3 (es) | 2019-03-13 |
EP1020642B1 (en) | 2016-09-07 |
EP2278166A3 (en) | 2013-09-11 |
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