JP3757525B2 - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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Publication number
JP3757525B2
JP3757525B2 JP04194997A JP4194997A JP3757525B2 JP 3757525 B2 JP3757525 B2 JP 3757525B2 JP 04194997 A JP04194997 A JP 04194997A JP 4194997 A JP4194997 A JP 4194997A JP 3757525 B2 JP3757525 B2 JP 3757525B2
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JP
Japan
Prior art keywords
bearing
crankshaft
sub
fixing member
compression mechanism
Prior art date
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Expired - Fee Related
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JP04194997A
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Japanese (ja)
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JPH10238486A (en
Inventor
敏治 野洲
靖 饗場
弘之 福原
能宣 小嶋
飯田  登
卓士 佐々
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Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Priority to JP04194997A priority Critical patent/JP3757525B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は、冷暖房装置あるいは冷蔵庫などに用いられるスクロール圧縮機やロータリー圧縮機などの密閉型圧縮機に関するものである。
【0002】
【従来の技術】
従来より、冷暖房装置、あるいは冷蔵庫などの冷却装置にはスクロール圧縮機やロータリー圧縮機などの密閉型圧縮機が用いられている。この種類の圧縮機の従来技術として、スクロール圧縮機を例にとり図面とともに説明する。
【0003】
図7に示すように、密閉容器101の内部には、圧縮機構部102、電動機部103を構成する回転子104と固定子105、電動機部103の回転力を圧縮機構部102に伝達するクランク軸106、クランク軸106を支承する主軸受け107と副軸受け108が電動機部103の両側に設置されており、副軸受け108は固定部材109により支承されている。また、密閉容器下部にはオイル溜まり110が配設され、さらに、密閉容器101には、低圧冷媒ガスを吸入するための吸入管111、圧縮機構部102で圧縮された高圧冷媒ガスを密閉容器の外部へ吐出するための吐出管112が設けられ、クランク軸106の端部にはオイルポンプ113が設けられている。
【0004】
上記構成において、電動機部103の回転子104が回転すると、この回転力はクランク軸106によって圧縮機構部102に伝達される。圧縮機構部102に回転力が伝達されると、冷媒ガスに圧縮作用が生じる。この結果、吸入管111より吸入された低圧冷媒ガスは、圧縮機構部102で高圧冷媒ガスに圧縮されて、いったん密閉容器101内の吐出口側空間114に吐出された後、圧縮機構部102に設けられた連通口115及び固定子105に設けられた切り欠き部116を通り、副軸受け側空間117に至り、最終的に吐出管112より冷凍サイクル中へ吐き出される。
【0005】
以上の圧縮作用によりクランク軸106には、冷媒圧縮時のラジアル方向の荷重に加え、回転子104の自重、電動機部103に発生する吸引力が加わり、たわみ変形が生じる。その結果、特に副軸受け108に片当たりが発生し、摩耗、焼付きの原因となる。また、クランク軸106を両端にて支承する為、組立時に主軸受け107と副軸受け108の同軸精度が要求される。本従来例では、副軸受け108として転がり軸受けを使用し、固定部材109に圧入固定し、これを密閉容器101に溶接固定している。この転がり軸受けの内輪118と外輪119の間に生じるあそびにより調芯機能を有している。
【0006】
、オイル溜まり110の冷凍機油は、オイルポンプ113を介して汲み上げられた後、クランク軸106に設けられた連通口120を通り、圧縮機構部102へ供給される。この冷凍機油は、圧縮機構部102の摺動部を潤滑後オイル溜まり110に戻る。
【0007】
【発明が解決しようとする課題】
従来の技術では、副軸受けに転がり軸受けを採用することにより、クランク軸のたわみ変形に基づく片当たり、焼き付きを防止すると共に、軸受けの組立精度の緩和を行っている。しかしながら、転がり軸受けは非常にコストが高く、また固定部材に圧入し固定するため、固定部材側の精度も要求される。さらに運転時は、鋼球の転動音と内外輪のあそびにより滑り軸受けと比較して、音圧レベルの上昇および音質の不安定化、振動の増大といった圧縮機の性能の低下を引き起こす可能性が高くなる。また転がり軸受けの調芯に対する許容度は、内外輪のあそびによる程度であり、それを超える軸芯のずれが発生した場合、クランク軸の回転に必要なトルクが急激に上昇し、消費電力の上昇、または圧縮機の起動不良につながる。また、既に副軸受けを圧入固定した固定部材を密閉容器に溶接するため、溶接時の歪等による軸芯ずれが発生し易くなる。
【0008】
本発明は、上記の課題を解決するものであり、クランク軸のたわみ変形および製品組立時の軸芯のずれによる副軸受けの片当たりによる摩耗を防止する手段を低コストで達成するものである。さらに、転がり軸受けより発生する振動、騒音を排除するとともに、両軸受けの軸芯ずれにより発生する消費電力の増大を防止し、高い信頼性を有した組立が容易となる。高効率で低騒音の圧縮機を安価で提供する事を目的とする。
【0009】
【課題を解決するための手段】
上記課題を解決するために本発明は、密閉容器内の中央部に電動機を配設し、一方にクランク軸を介して前記電動機で駆動する圧縮機構部を、他方に前記クランク軸の副軸部を支承する副軸受けと前記副軸受けを支承する固定部材を具備した密閉型圧縮機において、前記固定部材の副軸受けとの接触部が反電動機側にテーパ形状でくぼみ、テーパ形状部と接する前記副軸受けの外周の一端が球形状を有し、前記副軸受けを前記クランク軸と固定部材で挟み込むものである。
【0010】
上記により、クランク軸がたわみ変形や組立時の両軸受けの軸芯ずれにより傾斜すると、副軸受けはこれに追従して傾斜しようとするが、このとき副軸受けと副軸受けを支承する固定部材の接触部は、球形状とテーパ形状の組み合わせで構成されるため副軸受けはスライドし易く、クランク軸に容易に追従でき、その結果片当たりを防止することができる。さらに本仕様では、クランク軸に発生するスラスト方向の荷重を受ける、スラスト軸受けを兼ねることができる。
【0015】
【発明の実施の形態】
請求項1に記載の発明は、密閉容器内の中央部に電動機を配設し、一方にクランク軸を介して前記電動機で駆動する圧縮機構部を、他方に前記クランク軸の副軸部を支承する副軸受けと前記副軸受けを支承する固定部材と潤滑油を圧縮機構部に供給するオイルポンプを具備した密閉型圧縮機において、前記固定部材の副軸受けとの接触部が電動機側にテーパ形状でくぼみ、前記固定部材の反電動機側に外周の角部を球形状とする副軸受けを配設し、反電動機側にテーパ形状のくぼみを有する前記オイルポンプと前記固定部材で前記副軸受けを挟み込むものである。
【0016】
請求項に記載の発明は、固定部材及びオイルポンプの副軸受けとの接触部が球形状または球形状とテーパ形状の組み合わせとするものである。
【0017】
【実施例】
以下本発明の実施例について図面を参照して説明する。
【0018】
(実施例1)
図1に示すように、密閉容器1の内部には、圧縮機構部2、電動機部3を構成する回転子4と固定子5、電動機部3の回転力を圧縮機構部2に伝達するクランク軸6、クランク軸6を支承する主軸受け7と副軸受け8が電動機部3の両側に設置されており、副軸受け8は固定部材9により支承されている。また、密閉容器下部にはオイル溜まり10が配設され、さらに、密閉容器1には、低圧冷媒ガスを吸入するための吸入管11、圧縮機構部2で圧縮された高圧冷媒ガスを密閉容器の外部へ吐出するための吐出管12が設けられ、クランク軸6の端部にはオイルポンプ13が設けられている。
【0019】
上記構成において、電動機部3の回転子4が回転すると、この回転力はクランク軸6によって圧縮機構2に伝達される。圧縮機構部2に回転力が伝達されると、冷媒ガスに圧縮作用が生じる。この結果、吸入管11より吸入された低圧冷媒ガスは、圧縮機構部2で高圧冷媒ガスに圧縮されて、いったん密閉容器1内の吐出口側空間14に吐出された後、圧縮機構部2に設けられた連通口15及び固定子5に設けられた切り欠き部16を通り、副軸受け側空間17に至り、最終的に吐出管12より冷凍サイクル中へ吐き出される。
【0020】
以上の圧縮作用によりクランク軸6には、冷媒圧縮時のラジアル方向の荷重に加え、回転子4の自重、電動機部3に発生する吸引力が加わり、たわみ変形が生じる。その結果、特に副軸受け8に片当たりが発生し、磨耗、焼付きの原因となる。また、クランク軸6を両端にて支承する為、組立時に主軸受け7と副軸受け8の同軸精度が要求される。
【0021】
そこで本発明では、固定部材9の副軸受け8との接触部をテーパ形状にし、このテーパ形状部と接する副軸受け8の外周の一端を球形状で構成し、副軸受け8をクランク軸6と固定部材9で挟み込んでいる。そしてこの構成によればクランク軸6が、たわみ変形や組立時の主軸受け7と副軸受け8の軸芯ずれにより傾斜すると、副軸受け8はクランク軸6のスラスト方向力を受け、これに追従して傾斜しようとするが、このとき副軸受け8と副軸受け8を支承する固定部材9の接触部は、球形状とテーパ形状の組み合わせで構成されるため副軸受け8はスライドし易く、クランク軸6に容易に追従でき、その結果片当たりを防止することができる。
【0022】
(実施例2)
図2では、固定部材9の副軸受け8との接触部を球形状にて構成している。これによりクランク軸6が、たわみ変形や組立時の主軸受け7と副軸受け8の軸芯ずれにより傾斜すると、これに追従して副軸受け8の球形状部と固定部材9の球形状部がスライドして、片当たりを防止することができる。
【0023】
(実施例3)
図3では、固定部材9の副軸受け8との接触部が電動機側にテーパ形状でくぼんでおり、この固定部材9の反電動機側に外周の角部を球形状とする副軸受け8を配設し、さらにこの副軸受け8の反電動機側にテーパ形状でくぼんだ補助固定部材18を設けて、副軸受けを挟み込む構成にしている。
【0024】
この構成によれば、クランク軸6が傾斜すると、副軸受け8へのスラスト荷重が均等な分布から偏分布になる。その結果副軸受け8は、スラスト荷重が均等に分布するようにクランク軸6に追従して傾斜しょうとするが、このとき副軸受け8と副軸受け8を支承する固定部材9及び補助固定部材18の接触部は、球形状とテーパ形状の組み合わせで構成されるため副軸受け8はスライドし易く、クランク軸6に容易に追従でき、その結果、上記実施例と同様に片当たりを防止することができる。さらに本仕様では、反電動機方向より、順次部品の組み付けをクランク軸6を基準として行うことができ組立易い。
【0025】
(実施例4)
図4では、固定部材9及び補助固定部材18の副軸受け8との接触部が球形状または球形状とテーパ形状の組み合わせとするものである。これにより上記実施例と同様の効果を得ることができる。
【0026】
(実施例5)
図5では、上記実施例3及び4にて仕様の補助固定部材18の代替として潤滑油を圧縮機構部に供給するオイルポンプ13に反電動機側にテーパ形状のくぼみを形成し、このオイルポンプ13と固定部材9で副軸受け8を挟み込む構成としている。これにより部品点数を増加させることなく、上記実施例と同等の効果を得ることができる。
【0027】
(実施例6)
図6では、固定部材9及びオイルポンプ13の副軸受け8との接触部が、球形状または球形状とテーパ形状の組み合わせとしている。これにより上記実施例と同等の効果を得ることができる。
【0028】
【発明の効果】
上記実施例から明らかなように、請求項1に記載の発明は、密閉容器内の中央部に電動機を配設し、一方にクランク軸を介して前記電動機で駆動する圧縮機構部を、他方に前記クランク軸の副軸部を支承する副軸受けと前記副軸受けを支承する固定部材と潤滑油を圧縮機構部に供給するオイルポンプを具備した密閉型圧縮機において、前記固定部材の副軸受けとの接触部が電動機側にテーパ形状でくぼみ、前記固定部材の反電動機側に外周の角部を球形状とする副軸受を配設し、反電動機側にテーパー形状のくぼみを有する前記オイルポンプと前記固定部材で前記副軸受を挟み込んだことを特徴としており、この構成によれば、クランク軸が、たわみ変形や組立時の主軸受けと副軸受けの軸芯ずれにより傾斜すると、副軸受けはクランク軸よりスラスト方向の力を受け、これに追従して傾斜しようとするが、このとき副軸受けと副軸受けを支承する固定部材の接触部は、球形状とテーパ形状の組み合わせで構成されるため副軸受けはスライドし易く、クランク軸に容易に追従でき、その結果片当たりを防止することができ副軸部の摩耗、焼き付き等のない信頼性の高い密閉型圧縮機を、反電動機側より、クランク軸を基準に組み付けを行うことで容易に組み立てる事が可能となる。
【図面の簡単な説明】
【図1】本発明の実施例1における密閉型圧縮機の断面図
【図2】本発明の実施例2における密閉型圧縮機の部分断面図
【図3】本発明の実施例3における密閉型圧縮機の部分断面図
【図4】本発明の実施例4における密閉型圧縮機の部分断面図
【図5】本発明の実施例5における密閉型圧縮機の部分断面図
【図6】本発明の実施例6における密閉型圧縮機の部分断面図
【図7】従来例の密閉型圧縮機の断面図
【符号の説明】
1 密閉容器
2 圧縮機構部
3 電動機部
4 回転子
5 固定子
6 クランク軸
7 主軸受け
8 副軸受け
9 固定部材
10 オイル溜まり
11 吸入管
12 吐出管
13 オイルポンプ
14 吐出側空間
15 連通口
16 切り欠き部
17 副軸受け側空間
18 補助固定部材
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a hermetic compressor such as a scroll compressor or a rotary compressor used in an air conditioner or a refrigerator.
[0002]
[Prior art]
Conventionally, a hermetic compressor such as a scroll compressor or a rotary compressor has been used for a cooling device such as a cooling / heating device or a refrigerator. As a conventional technique of this type of compressor, a scroll compressor will be described as an example with reference to the drawings.
[0003]
As shown in FIG. 7, the airtight container 101 includes a compression mechanism unit 102, a rotor 104 and a stator 105 constituting the motor unit 103, and a crankshaft that transmits the rotational force of the motor unit 103 to the compression mechanism unit 102. 106, a main bearing 107 and a sub bearing 108 that support the crankshaft 106 are installed on both sides of the electric motor unit 103, and the sub bearing 108 is supported by a fixing member 109. In addition, an oil reservoir 110 is disposed at the lower part of the sealed container. Further, the sealed container 101 receives the high-pressure refrigerant gas compressed by the compression pipe 102 and the suction pipe 111 for sucking the low-pressure refrigerant gas. A discharge pipe 112 for discharging to the outside is provided, and an oil pump 113 is provided at the end of the crankshaft 106.
[0004]
In the above configuration, when the rotor 104 of the electric motor unit 103 rotates, this rotational force is transmitted to the compression mechanism unit 102 by the crankshaft 106. When the rotational force is transmitted to the compression mechanism unit 102, the refrigerant gas is compressed. As a result, the low-pressure refrigerant gas sucked from the suction pipe 111 is compressed into the high-pressure refrigerant gas by the compression mechanism unit 102, and is once discharged into the discharge port side space 114 in the sealed container 101, and then into the compression mechanism unit 102. It passes through the notch 116 provided in the communication port 115 and the stator 105 provided, reaches the sub bearing side space 117, and is finally discharged from the discharge pipe 112 into the refrigeration cycle.
[0005]
As a result of the compression action described above, the crankshaft 106 is subjected to deflection due to the weight of the rotor 104 and the suction force generated in the motor unit 103 in addition to the radial load during refrigerant compression. As a result, the sub-bearing 108 is particularly hit and causes wear and seizure. Further, since the crankshaft 106 is supported at both ends, coaxial accuracy of the main bearing 107 and the sub-bearing 108 is required at the time of assembly. In this conventional example, a rolling bearing is used as the sub-bearing 108, press-fitted and fixed to the fixing member 109, and this is fixed to the sealed container 101 by welding. A centering function is provided by the play generated between the inner ring 118 and the outer ring 119 of the rolling bearing.
[0006]
Hand, refrigerating machine oil of the oil reservoir 110, after being pumped through the oil pump 113 through the communication port 120 provided on the crank shaft 106, is supplied to the compression mechanism unit 102. The refrigerating machine oil returns to the oil reservoir 110 after lubricating the sliding portion of the compression mechanism portion 102.
[0007]
[Problems to be solved by the invention]
In the prior art, by adopting a rolling bearing as the sub-bearing, it is possible to prevent seizure and seizure due to bending deformation of the crankshaft and to reduce the assembly accuracy of both bearings. However, the rolling bearing is very expensive, and since it is press-fitted and fixed to the fixing member, accuracy on the fixing member side is also required. In addition, during operation, the rolling noise of the steel balls and the play of the inner and outer rings may cause a decrease in compressor performance such as increased sound pressure level, unstable sound quality, and increased vibration compared to sliding bearings. Becomes higher. In addition, the tolerance for the alignment of the rolling bearing is only due to the play of the inner and outer rings, and if the shaft misalignment exceeds that, the torque required for rotation of the crankshaft increases rapidly, resulting in an increase in power consumption. Or, it will lead to the start failure of the compressor. In addition, since the fixing member that has already press-fitted and fixed the sub-bearing is welded to the sealed container, misalignment of the shaft due to distortion during welding is likely to occur.
[0008]
The present invention solves the above-described problems, and achieves at low cost means for preventing wear due to contact of a sub-bearing due to deflection of the crankshaft and displacement of the shaft core during product assembly. Furthermore, vibrations and noises generated from the rolling bearings are eliminated, and an increase in power consumption caused by shaft misalignment between both bearings is prevented, so that highly reliable assembly is facilitated. The purpose is to provide a low-cost compressor with high efficiency and low noise.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides an electric motor in the central part of a sealed container, a compression mechanism that is driven by the electric motor via a crankshaft on one side, and an auxiliary shaft part of the crankshaft on the other side. In the hermetic compressor comprising a secondary bearing for supporting the secondary bearing and a fixing member for supporting the secondary bearing, the contact portion of the stationary member with the secondary bearing is recessed toward the counter-motor side in a tapered shape, and the secondary compressor is in contact with the tapered shape portion. One end of the outer periphery of the bearing has a spherical shape, and the auxiliary bearing is sandwiched between the crankshaft and a fixing member.
[0010]
As a result, when the crankshaft is tilted due to deflection deformation or misalignment of both bearings during assembly, the secondary bearing tends to tilt following this, but at this time, the contact between the secondary bearing and the fixing member that supports the secondary bearing Since the portion is composed of a combination of a spherical shape and a tapered shape, the secondary bearing is easy to slide and can easily follow the crankshaft. Furthermore, in this specification, it can also serve as a thrust bearing that receives a load in the thrust direction generated on the crankshaft.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, an electric motor is disposed in the central portion of the sealed container, and a compression mechanism portion driven by the electric motor via a crankshaft is supported on one side and a countershaft portion of the crankshaft is supported on the other side. A hermetic compressor including an auxiliary pump that supports the auxiliary bearing, an oil pump that supplies lubricating oil to the compression mechanism, and a contact portion of the fixed member with the auxiliary bearing is tapered toward the motor side. An indentation is provided with a secondary bearing having a spherical outer peripheral corner on the anti-motor side of the fixed member, and the auxiliary pump is sandwiched between the oil pump having the tapered recess on the anti-motor side and the fixed member. It is.
[0016]
According to the second aspect of the present invention, the contact portion between the fixing member and the sub-bearing of the oil pump has a spherical shape or a combination of a spherical shape and a tapered shape.
[0017]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0018]
Example 1
As shown in FIG. 1, inside the sealed container 1, a crankshaft that transmits the rotational force of the compressor 4, the rotor 4 and the stator 5 that constitute the motor unit 3, and the motor unit 3 to the compression mechanism 2. 6. A main bearing 7 and a sub-bearing 8 for supporting the crankshaft 6 are installed on both sides of the motor unit 3, and the sub-bearing 8 is supported by a fixing member 9. In addition, an oil reservoir 10 is disposed at the lower part of the sealed container. Further, the sealed container 1 receives a high-pressure refrigerant gas compressed by the suction pipe 11 for sucking the low-pressure refrigerant gas and the compression mechanism unit 2 in the sealed container. A discharge pipe 12 for discharging to the outside is provided, and an oil pump 13 is provided at the end of the crankshaft 6.
[0019]
In the above configuration, when the rotor 4 of the electric motor unit 3 rotates, this rotational force is transmitted to the compression mechanism 2 by the crankshaft 6. When the rotational force is transmitted to the compression mechanism unit 2, the refrigerant gas is compressed. As a result, the low-pressure refrigerant gas sucked from the suction pipe 11 is compressed into the high-pressure refrigerant gas by the compression mechanism unit 2, and is once discharged into the discharge port side space 14 in the sealed container 1, and then into the compression mechanism unit 2. It passes through the communication port 15 provided and the notch 16 provided in the stator 5, reaches the auxiliary bearing side space 17, and is finally discharged from the discharge pipe 12 into the refrigeration cycle.
[0020]
As a result of the compression action described above, the crankshaft 6 is subjected to deflection due to the weight of the rotor 4 and the suction force generated in the motor unit 3 in addition to the radial load during refrigerant compression. As a result, the sub-bearing 8 is particularly likely to come into contact with each other, causing wear and seizure. Further, since the crankshaft 6 is supported at both ends, the coaxial accuracy of the main bearing 7 and the sub-bearing 8 is required during assembly.
[0021]
Therefore, in the present invention, the contact portion of the fixing member 9 with the auxiliary bearing 8 is tapered, and one end of the outer periphery of the auxiliary bearing 8 in contact with the tapered portion is formed in a spherical shape, and the auxiliary bearing 8 is fixed to the crankshaft 6. It is sandwiched between the members 9. According to this configuration, when the crankshaft 6 is inclined due to deflection deformation or misalignment of the main bearing 7 and the subbearing 8 at the time of assembly, the subbearing 8 receives the thrust direction force of the crankshaft 6 and follows this. At this time, the contact portion of the sub-bearing 8 and the fixing member 9 that supports the sub-bearing 8 is composed of a combination of a spherical shape and a tapered shape, so that the sub-bearing 8 is easy to slide and the crankshaft 6 Can be easily followed, and as a result, the piece contact can be prevented.
[0022]
(Example 2)
In FIG. 2, the contact portion of the fixing member 9 with the auxiliary bearing 8 is formed in a spherical shape. As a result, when the crankshaft 6 is tilted due to deflection deformation or misalignment of the main bearing 7 and the sub-bearing 8 during assembly, the spherical portion of the sub-bearing 8 and the spherical portion of the fixing member 9 slide following this. Thus, it is possible to prevent contact with one piece.
[0023]
Example 3
In FIG. 3, the contact portion of the fixed member 9 with the auxiliary bearing 8 is recessed in a tapered shape on the motor side, and the auxiliary bearing 8 having a spherical corner on the outer periphery is disposed on the counter motor side of the fixed member 9. Further, an auxiliary fixing member 18 having a tapered shape is provided on the counter-motor side of the auxiliary bearing 8 so as to sandwich the auxiliary bearing.
[0024]
According to this configuration, when the crankshaft 6 is inclined, the thrust load applied to the sub-bearing 8 is changed from the uniform distribution to the uneven distribution. As a result, the secondary bearing 8 tries to incline following the crankshaft 6 so that the thrust load is evenly distributed. At this time, the auxiliary bearing 8 and the fixing member 9 supporting the auxiliary bearing 8 and the auxiliary fixing member 18 Since the contact portion is composed of a combination of a spherical shape and a tapered shape, the secondary bearing 8 is easy to slide and can easily follow the crankshaft 6. As a result, as in the above embodiment, it is possible to prevent one-side contact. . Furthermore, in this specification, the parts can be assembled sequentially from the counter-motor direction with reference to the crankshaft 6 so that assembly is easy.
[0025]
(Example 4)
In FIG. 4, the contact portions of the fixing member 9 and the auxiliary fixing member 18 with the secondary bearing 8 are spherical or a combination of a spherical shape and a tapered shape. As a result, the same effect as in the above embodiment can be obtained.
[0026]
(Example 5)
In FIG. 5, a tapered recess is formed on the side opposite to the electric motor in the oil pump 13 that supplies lubricating oil to the compression mechanism as an alternative to the auxiliary fixing member 18 specified in the third and fourth embodiments. And the auxiliary bearing 8 is sandwiched between the fixing members 9. As a result, the same effect as the above embodiment can be obtained without increasing the number of parts.
[0027]
(Example 6)
In FIG. 6, the contact portion between the fixing member 9 and the sub-bearing 8 of the oil pump 13 has a spherical shape or a combination of a spherical shape and a tapered shape. Thereby, an effect equivalent to that of the above embodiment can be obtained.
[0028]
【The invention's effect】
As apparent from the above embodiment, the invention according to claim 1 is characterized in that an electric motor is disposed in the central portion of the sealed container, and a compression mechanism portion driven by the electric motor via a crankshaft is provided on the other side. A hermetic compressor including a sub-bearing that supports the sub-shaft portion of the crankshaft, a fixing member that supports the sub-bearing, and an oil pump that supplies lubricating oil to the compression mechanism portion . The oil pump having a tapered recess on the motor side, a secondary bearing having a spherical corner on the outer periphery on the counter-motor side of the fixed member , and the taper-shaped recess on the counter-motor side; and and characterized by a fixed member by sandwiching the sub-bearing, according to this configuration, when the crank shaft is inclined by the main bearing and the shaft misalignment of the sub-bearing during deflection and assembly, the sub-bearing crankshaft It receives thrust in the thrust direction and tries to incline and follow this, but at this time the contact part of the fixed member that supports the secondary bearing and the secondary bearing is composed of a combination of a spherical shape and a tapered shape, A highly reliable hermetic compressor that is easy to slide and can easily follow the crankshaft, and as a result can be prevented from hitting the countershaft without causing wear or seizure of the countershaft. By assembling to the standard, it becomes possible to assemble easily.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a hermetic compressor in Embodiment 1 of the present invention. FIG. 2 is a partial cross-sectional view of a hermetic compressor in Embodiment 2 of the present invention. FIG. 4 is a partial cross-sectional view of a hermetic compressor according to a fourth embodiment of the present invention. FIG. 5 is a partial cross-sectional view of a hermetic compressor according to a fifth embodiment of the present invention. FIG. 7 is a partial cross-sectional view of a hermetic compressor in Example 6 of the present invention. FIG. 7 is a cross-sectional view of a hermetic compressor of a conventional example.
DESCRIPTION OF SYMBOLS 1 Airtight container 2 Compression mechanism part 3 Electric motor part 4 Rotor 5 Stator 6 Crankshaft 7 Main bearing 8 Sub bearing 9 Fixing member 10 Oil sump 11 Suction pipe 12 Discharge pipe 13 Oil pump 14 Discharge side space 15 Communication port 16 Notch Part 17 Sub-bearing side space 18 Auxiliary fixing member

Claims (2)

密閉容器内の中央部に電動機を配設し、一方にクランク軸を介して前記電動機で駆動する圧縮機構部を、他方に前記クランク軸の副軸部を支承する副軸受けと前記副軸受けを支承する固定部材と潤滑油を圧縮機構部に供給するオイルポンプを具備した密閉型圧縮機において、前記固定部材の副軸受けとの接触部が電動機側にテーパ形状でくぼみ、前記固定部材の反電動機側に外周の角部を球形状とする副軸受けを配設し、反電動機側にテーパ形状のくぼみを有する前記オイルポンプと前記固定部材で前記副軸受けを挟み込んだことを特徴とする密閉型圧縮機。  An electric motor is disposed in the center of the sealed container, one side is a compression mechanism driven by the electric motor via a crankshaft, and the other side is a sub-bearing that supports the sub-shaft portion of the crankshaft and the sub-bearing. A hermetic compressor including an oil pump for supplying a fixing member and lubricating oil to a compression mechanism, wherein a contact portion of the fixing member with a secondary bearing is recessed in a tapered shape on the motor side, and the anti-motor side of the fixing member A hermetic compressor, wherein a secondary bearing having a spherical shape at the outer peripheral corner is disposed in the oil pump, and the secondary bearing is sandwiched between the oil pump having a tapered recess on the counter-motor side and the fixing member. . 固定部材及びオイルポンプの副軸受けとの接触部が球形状または球形状とテーパ敬称の組み合わせであることを特徴とする請求項記載の密閉型圧縮機。The hermetic compressor of claim 1, wherein a contact portion between the sub-bearing of the fixed member and the oil pump is a combination of spherical or spherical shape and a tapered titles.
JP04194997A 1997-02-26 1997-02-26 Hermetic compressor Expired - Fee Related JP3757525B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP04194997A JP3757525B2 (en) 1997-02-26 1997-02-26 Hermetic compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04194997A JP3757525B2 (en) 1997-02-26 1997-02-26 Hermetic compressor

Publications (2)

Publication Number Publication Date
JPH10238486A JPH10238486A (en) 1998-09-08
JP3757525B2 true JP3757525B2 (en) 2006-03-22

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3731068B2 (en) * 2002-06-05 2006-01-05 ダイキン工業株式会社 Rotary compressor
CN102678566A (en) * 2011-03-18 2012-09-19 乐金电子(天津)电器有限公司 Rotary compressor
CA2935489C (en) * 2014-01-03 2022-01-04 Koninklijke Douwe Egberts B.V. System for preparing beverage consumptions
WO2019229842A1 (en) * 2018-05-29 2019-12-05 三菱電機株式会社 Compressor

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