JP2005344600A - Hermetic compressor - Google Patents

Hermetic compressor Download PDF

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JP2005344600A
JP2005344600A JP2004164767A JP2004164767A JP2005344600A JP 2005344600 A JP2005344600 A JP 2005344600A JP 2004164767 A JP2004164767 A JP 2004164767A JP 2004164767 A JP2004164767 A JP 2004164767A JP 2005344600 A JP2005344600 A JP 2005344600A
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Prior art keywords
stator
press
bearing
rotating shaft
compression mechanism
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Izumi Onoda
泉 小野田
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Toshiba Carrier Corp
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Toshiba Carrier Corp
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Priority to JP2004164767A priority Critical patent/JP2005344600A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/0085Prime movers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic compressor improving productivity by reducing press fitting stress at a time of press-fitting a stator into a bearing and making alignment work of the stator unnecessary, and improving lubricating characteristics by regulating stay and blow up of lubricating oil. <P>SOLUTION: An electric compressor main body 5 connecting a compression mechanism part 3 and a motor part 4 via a rotary shaft 2 is stored in a hermetic case 1. The compression mechanism part is provided with a main bearing 15 pivotally supporting the rotary shaft. The motor part constructs an outer rotor type motor part which consists of the stator 9 provided with an attachment hole 9a which is press-fitted and fixed on an outer diameter part of a main bearing boss part 15b and an umbrella type rotor 10 attached on the rotary shaft and extending with keeping a predetermined gap with an outer circumference surface of the stator. A space release part 17 keeping a gap with a rotary shaft circumference surface is provided on an inner diameter part of a main bearing boss part. An oil release hole 18 communicating to the space release part and the bearing outer diameter part and opening in the hermetic case is provided. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、回転軸を軸支する軸受けに固定される固定子と、回転軸に取付けられ固定子の外周面と所定間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を備えた密閉型圧縮機に関する。   The present invention is a so-called outer rotor type comprising a stator that is fixed to a bearing that supports a rotating shaft, and an umbrella-type rotor that is attached to the rotating shaft and extends so as to have a predetermined gap from the outer peripheral surface of the stator. The present invention relates to a hermetic compressor including an electric motor section.

たとえば冷凍サイクル構成機器として用いられる密閉型圧縮機は種々の形態があるが、一般的には密閉ケース内に、回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容している。近時、上記圧縮機構部は2シリンダタイプが多用されるとともに、電動機部として、いわゆるアウターローター型のものが提案されている。
上記アウターローター型電動機部は、軸受けの内径部に回転軸を軸支し、この軸受けの外径部に固定子を取付け固定する。回転子は、回転軸に取付けられ端部が固定子外周に延出される傘部と、この傘部の端部に取付けられ固定子外周面と所定の間隙を存して並行な回転子部とからなり、いわゆる傘型回転子を備える。
具体的には、たとえば[特許文献1]および[特許文献2]に開示されるようになっている。いずれも、回転軸は圧縮機構部を構成する主軸受けに軸支され、この主軸受けの外径部に固定子孔部が圧入固定される。回転軸は主軸受け上端および固定子上端面から突出し、この突出部に傘型回転子の傘部が嵌着される。
特開2001−268832号公報 特開2002− 21733号公報
For example, there are various forms of hermetic compressors used as refrigeration cycle components, but in general, an electric compressor main body in which a compression mechanism and an electric motor are connected via a rotating shaft in a hermetic case. Is housed. Recently, a two-cylinder type is often used as the compression mechanism, and a so-called outer rotor type has been proposed as an electric motor.
The outer rotor type electric motor part supports a rotating shaft on the inner diameter part of the bearing, and attaches and fixes a stator to the outer diameter part of the bearing. The rotor includes an umbrella portion that is attached to the rotation shaft and has an end portion extending to the outer periphery of the stator, and a rotor portion that is attached to the end portion of the umbrella portion and that is parallel to the stator outer peripheral surface with a predetermined gap. It comprises a so-called umbrella rotor.
Specifically, for example, it is disclosed in [Patent Document 1] and [Patent Document 2]. In either case, the rotating shaft is supported by a main bearing that constitutes the compression mechanism, and a stator hole is press-fitted and fixed to the outer diameter portion of the main bearing. The rotary shaft protrudes from the upper end surface of the main bearing and the upper end surface of the stator, and the umbrella portion of the umbrella-type rotor is fitted into the protruding portion.
JP 2001-268832 A JP 2002-21733 A

ところで、上述の[特許文献1]と[特許文献2]に開示される密閉型圧縮機において、上記主軸受けは内径部に回転軸を回転自在に支持し、外径部に固定子孔部を圧入しなければならない。そのため、主軸受けにおける内外径の同軸度を極めて高精度に仕上げる必要があり、工数の増大化を招いている。
また、上記主軸受け内径部に固定子を圧入することで圧入ストレスが発生し、これにより主軸受けの内径変形が生じ易い。回転軸の回転特性の低下を招いたり、軸信頼性を確保し難いこととなる。固定子は回転子の回転中心に対して傾きやズレが生じ易く、調芯作業に手間がかかってコストに悪影響を及ぼす。
By the way, in the hermetic compressor disclosed in the above-mentioned [Patent Document 1] and [Patent Document 2], the main bearing rotatably supports the rotating shaft on the inner diameter portion and the stator hole portion on the outer diameter portion. Must be press-fitted. Therefore, it is necessary to finish the coaxiality of the inner and outer diameters of the main bearing with extremely high accuracy, resulting in an increase in man-hours.
Further, press-fitting stress is generated by press-fitting a stator into the inner diameter portion of the main bearing, thereby easily deforming the inner diameter of the main bearing. As a result, the rotational characteristics of the rotating shaft are degraded, and it is difficult to ensure shaft reliability. The stator is liable to be inclined or misaligned with respect to the rotation center of the rotor, which takes time for alignment work and adversely affects cost.

いずれの密閉型圧縮機においても、主軸受けは回転軸の下部側一部を軸支し、固定子は上下方向全長の略半分程度だけ主軸受けに圧入される。したがって、主軸受け上端から上方部位は回転軸周面と固定子孔部との間に、主軸受け肉厚分の空隙部が形成されている。
一方、密閉ケース内底部には潤滑油を貯溜する油溜り部が形成されていて、回転軸の回転にともなって油溜り部から潤滑油が吸い上げられ、圧縮機構部を構成する各摺動部に給油される。これら潤滑油の一部は、主軸受けの上端から流出し、再び油溜り部に戻されるようになっている。
In any hermetic compressor, the main bearing pivotally supports a part of the lower side of the rotating shaft, and the stator is press-fitted into the main bearing only about half of the entire length in the vertical direction. Accordingly, an upper portion from the upper end of the main bearing is formed with a gap corresponding to the thickness of the main bearing between the rotating shaft peripheral surface and the stator hole.
On the other hand, an oil reservoir for storing lubricating oil is formed at the bottom of the sealed case, and the lubricating oil is sucked up from the oil reservoir as the rotating shaft rotates, and is attached to each sliding portion constituting the compression mechanism. Refueled. A part of these lubricating oils flows out from the upper end of the main bearing and is returned to the oil reservoir.

ところが、回転軸上部と固定子孔部との間に主軸受け肉厚分の空隙部が形成されているので、主軸受けの上端から流出した潤滑油が上記空隙部に溜ったまま油溜り部に戻らない。その結果、油溜り部の潤滑油貯溜量が減少し、たとえば起動時など多量の潤滑油を必要とする際に不足し勝ちになり、潤滑特性に影響を与えてしまう。
さらに、起動時において上記空隙部に溜っていた潤滑油が回転軸の回転駆動にともなって空隙部から吹き上がり、密閉ケース上端部に接続される吐出管から圧縮冷媒とともに吐出され易い。圧縮機内の潤滑油が冷凍サイクル回路内に導かれてしまい、油溜り部における潤滑油の絶対量が不足することとなる。
なお、特に[特許文献2]において圧縮機構部は、いわゆるロータリー型をなし、回転軸にはローラーに嵌合する偏心部が一体に設けられる。そのため、傘型回転子を構成する傘部には、回転軸の回転にともなうアンバランスを規制するためにバランサが別部品として用意され、取付けられている。また、バランサの取付け位置を、傘型回転子の傘部である広い範囲から選択しなければならず、困難をともなう。
However, since a gap corresponding to the thickness of the main bearing is formed between the upper part of the rotating shaft and the stator hole, the lubricating oil flowing out from the upper end of the main bearing remains in the gap while remaining in the gap. Dont return. As a result, the amount of stored lubricating oil in the oil reservoir is reduced, and when a large amount of lubricating oil is required, for example, at the time of start-up, the lubricating oil characteristic is affected.
Further, the lubricating oil accumulated in the gap at the time of start-up blows up from the gap as the rotary shaft rotates, and is easily discharged together with the compressed refrigerant from the discharge pipe connected to the upper end of the sealed case. The lubricating oil in the compressor is introduced into the refrigeration cycle circuit, and the absolute amount of lubricating oil in the oil reservoir is insufficient.
In particular, in [Patent Document 2], the compression mechanism portion is a so-called rotary type, and an eccentric portion fitted to the roller is integrally provided on the rotation shaft. For this reason, a balancer is prepared and attached as a separate part to the umbrella portion constituting the umbrella-type rotor in order to regulate unbalance accompanying rotation of the rotation shaft. Moreover, the mounting position of the balancer must be selected from a wide range that is the umbrella portion of the umbrella-type rotor, which is difficult.

本発明は上記事情に着目してなされたものであり、第1の目的とするところは、アウターローター型電動機部を備えることを前提として、軸受けに固定子を圧入する際の圧入ストレスの低減を図り、固定子の調芯作業を不要として生産性の向上を得られ、回転軸と固定子との間からの油溜りと吹き上がりを規制して、潤滑特性の向上化を得る密閉型圧縮機を提供しようとするものである。
第2の目的とするところは、アウターローター型電動機部を備えることを前提として、軸受けに固定子を圧入する際の圧入力を低減して、圧入作業の向上化を図り、かつ圧入部の倒れを防止して、組立て精度を確保する密閉型圧縮機を提供しようとするものである。
第3の目的とするところは、アウターローター型電動機部および複数のシリンダからなるロータリー型圧縮機構部を備えることを前提として、バランサの位置設定の容易化と、バランサ重量の製造誤差の許容範囲を拡大して、構成の簡素化を図れる密閉型圧縮機を提供しようとするものである。
The present invention has been made paying attention to the above circumstances, and the first object is to reduce the press-fitting stress when the stator is press-fitted into the bearing on the premise that the outer rotor-type electric motor unit is provided. This is a hermetic compressor that can improve productivity by eliminating the need for aligning the stator and improving productivity and restricting oil accumulation and blowing from between the rotating shaft and the stator. Is to provide.
The second object is to provide an outer rotor type electric motor part, and to reduce the pressure input when the stator is press-fitted into the bearing, to improve the press-fitting work and to collapse the press-fitting part. Therefore, it is an object of the present invention to provide a hermetic compressor that prevents the above-described problems and ensures assembly accuracy.
The third object is to provide an easy-to-set balancer position and a tolerance for balancer weight manufacturing errors on the premise that an outer rotor type electric motor unit and a rotary type compression mechanism unit comprising a plurality of cylinders are provided. The present invention intends to provide a hermetic compressor that can be enlarged and simplified in configuration.

上述の第1の目的を満足するため本発明の密閉型圧縮機は、密閉ケース内に回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容し、圧縮機構部は回転軸を軸支する軸受けを備え、電動機部は軸受けの外径部に圧入固定される孔部を備えた固定子と、回転軸に取付けられ固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、軸受けの内径部に回転軸周面と間隙を存する空間逃げ部が設けられ、この空間逃げ部と軸受け外径部とを連通し密閉ケース内に開放する油逃し孔が設けられる。   In order to satisfy the above first object, a hermetic compressor of the present invention accommodates an electric compressor main body formed by connecting a compression mechanism part and an electric motor part via a rotating shaft in a hermetic case, and the compression mechanism The portion includes a bearing that supports the rotating shaft, and the electric motor portion includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and a predetermined gap between the stator and the outer peripheral surface of the stator. A so-called outer rotor type electric motor part composed of an umbrella-type rotor that is extended so that a space escape part is provided on the inner diameter part of the bearing, with a clearance between the rotation shaft peripheral surface and the outer diameter. An oil relief hole that communicates with the portion and opens into the sealed case is provided.

上述の第2の目的を満足するため本発明の密閉型圧縮機は、密閉ケース内に回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容し、圧縮機構部は回転軸を軸支する軸受けを備え、電動機部は軸受けの外径部に圧入固定される孔部を備えた固定子と、回転軸に取付けられ固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、軸受けの外径部は軸方向に沿い互いに所定間隔を存して設けられ固定子の孔部に圧入固定される複数の圧入固定部と、これら複数の圧入固定部の相互間に設けられ固定子と間隙を存する逃げ用凹部とを備えた。   In order to satisfy the second object described above, a hermetic compressor of the present invention accommodates an electric compressor body in which a compression mechanism and an electric motor are connected via a rotating shaft in a hermetic case, and the compression mechanism The portion includes a bearing that supports the rotating shaft, and the electric motor portion includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and a predetermined gap between the stator and the outer peripheral surface of the stator. A so-called outer rotor type electric motor part composed of an umbrella-type rotor that extends so that the outer diameter part of the bearing is provided at predetermined intervals along the axial direction and is press-fitted and fixed in the hole of the stator. A plurality of press-fit fixing portions, and a relief recess provided between the plurality of press-fit fixing portions and having a gap.

上述の第3の目的を満足するため本発明の密閉型圧縮機は、密閉ケース内に回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容し、圧縮機構部は回転軸を軸支する軸受けを備え、電動機部は軸受けの外径部に圧入固定される孔部を備えた固定子と、回転軸に取付けられ固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、圧縮機構部は複数のシリンダを備えたいわゆるロータリー型圧縮機構部であり、回転軸に回転軸の回転バランスをとるためのバランサを少なくとも1つもしくはそれ以上が取付けられる。   In order to satisfy the above third object, a hermetic compressor of the present invention accommodates an electric compressor main body formed by connecting a compression mechanism part and an electric motor part through a rotating shaft in a hermetic case, and the compression mechanism The portion includes a bearing that supports the rotating shaft, and the electric motor portion includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and a predetermined gap between the stator and the outer peripheral surface of the stator. A so-called outer rotor type electric motor unit comprising an umbrella-type rotor that extends so that the compression mechanism unit is a so-called rotary type compression mechanism unit having a plurality of cylinders, and the rotational axis of the rotary shaft is balanced with the rotational axis. At least one or more balancers for taking are attached.

本発明によれば、アウターローター型電動機部を備え、軸受けに固定子を圧入する際の圧入ストレスの低減を図り、固定子の調芯作業を不要として生産性の向上を得られ、回転軸と固定子との間での油溜りと吹上がりを規制して油量不足を解消し、潤滑特性の向上を図った密閉型圧縮機を提供できる。
さらに本発明によれば、アウターローター型電動機部を備え、軸受けに固定子を圧入する際の圧入力を低減して、圧入作業を向上しながら圧入部の長手方向の倒れを防止し、組立て精度を確保する密閉型圧縮機を提供できる。
さらに本発明によれば、アウターローター型電動機部および複数のシリンダからなるロータリー型圧縮機構部を備え、バランサの位置設定の容易化と、バランサ重量の製造誤差の許容範囲を拡大して構成の簡素化を図れる密閉型圧縮機を提供できる。
According to the present invention, the outer rotor type electric motor portion is provided, the press-fitting stress is reduced when the stator is press-fitted into the bearing, and the productivity is improved by eliminating the need for the stator alignment work. It is possible to provide a hermetic compressor that regulates oil accumulation and blowing with the stator, eliminates the shortage of oil, and improves lubrication characteristics.
Furthermore, according to the present invention, the outer rotor type electric motor part is provided, the press input when the stator is press-fitted into the bearing is reduced, the press-fitting work is prevented from falling down while improving the press-fitting work, and the assembly accuracy is improved. It is possible to provide a hermetic compressor that ensures the above.
Furthermore, according to the present invention, the rotary type compression mechanism portion comprising an outer rotor type electric motor portion and a plurality of cylinders is provided, the balancer weight can be easily set, and the tolerance range of the balancer weight can be increased to simplify the configuration. A hermetic compressor can be provided.

以下、図面を参照して本発明の実施の形態に係る密閉型圧縮機について説明する。
図1は第1の実施の形態における密閉型圧縮機の断面図であり、図2は要部を拡大した断面図である。
図中1は密閉ケースであって、これは下部ケース1Aと上部ケース1Bを組合せてなる組立て体である。下部ケース1Aおよび上部ケース1Bとも、浅絞り用の安価な鋼材で略椀状に一体成形されているが、それぞれ胴部に鋼管等を用いるとともに、端部を浅絞りの2ピースとなし、互いにアーク溶接などの手段で一体化してもよい。
Hereinafter, a hermetic compressor according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a hermetic compressor according to the first embodiment, and FIG. 2 is an enlarged cross-sectional view of a main part.
In the figure, reference numeral 1 denotes a sealed case, which is an assembly formed by combining a lower case 1A and an upper case 1B. Both the lower case 1A and the upper case 1B are integrally formed in a substantially bowl shape with inexpensive steel materials for shallow drawing, but each uses a steel pipe or the like for the body part, and the ends are formed as two pieces of shallow drawing, You may integrate by means, such as arc welding.

下部ケース1Aは上端部全面が開口され、上部ケース1Bは下端部全面が開口される。下部ケース1Aの上端開口部外径は上部ケース1B下端開口部内径と略同一に形成され、下部ケース1A上端開口部外径に上部ケース1B下端開口部内径が嵌め込まれ、たとえばアーク溶接等の手段をもって嵌め込み部分を完全シール構造となしている。
このような密閉ケース1内には、回転軸2を介して後述する圧縮機構部3と電動機部4とが連結されてなる電動圧縮機本体5が収容される。上記圧縮機構部3は、中間仕切板6を挟んで上下に2組のシリンダ7A,7Bを備えた2シリンダタイプのものであり、上記電動機部4は固定子9と傘型回転子10を備えた、いわゆるアウターローター型電動機部である。
The lower case 1A is opened at the entire upper end, and the upper case 1B is opened at the entire lower end. The outer diameter of the upper end opening of the lower case 1A is formed substantially the same as the inner diameter of the lower end opening of the upper case 1B, and the inner diameter of the lower end opening of the upper case 1B is fitted into the outer diameter of the upper end opening of the lower case 1A. The fitting part has a complete seal structure.
In such a sealed case 1, an electric compressor main body 5 is accommodated in which a compression mechanism section 3 and an electric motor section 4 which will be described later are connected via a rotating shaft 2. The compression mechanism section 3 is a two-cylinder type having two sets of cylinders 7A and 7B on the upper and lower sides with an intermediate partition plate 6 interposed therebetween. The electric motor section 4 includes a stator 9 and an umbrella-shaped rotor 10. It is a so-called outer rotor type electric motor section.

はじめに圧縮機構部3から詳述すると、下部側に第1のシリンダ7Aが設けられ、中間仕切板6を介して上部側に第2のシリンダ7Bが設けられる。第1のシリンダ7Aの外径は第2のシリンダ7Bの外径よりも大に形成されていて、この外周部は複数の取付けボルト11を介して下部ケース1Aの取付け座12に取付け固定される。
第1のシリンダ7Aの下面部には副軸受け13が取付けられ、このシリンダの下部側開口面を閉成する。下部ケース1Aの中心軸部分は下面側に膨出形成されていて、潤滑油を集溜する油溜り部14が形成される。下部ケース1Aに油溜り部14を設けることによって、上記副軸受け13に対する下部ケース1Aの干渉が回避される。
First, in detail from the compression mechanism section 3, the first cylinder 7 </ b> A is provided on the lower side, and the second cylinder 7 </ b> B is provided on the upper side via the intermediate partition plate 6. The outer diameter of the first cylinder 7A is formed larger than the outer diameter of the second cylinder 7B, and this outer peripheral portion is fixedly attached to the mounting seat 12 of the lower case 1A via a plurality of mounting bolts 11. .
A sub-bearing 13 is attached to the lower surface portion of the first cylinder 7A, and the lower opening surface of the cylinder is closed. The central shaft portion of the lower case 1A is formed to bulge on the lower surface side, and an oil reservoir portion 14 for collecting lubricating oil is formed. By providing the oil reservoir 14 in the lower case 1A, the interference of the lower case 1A with the auxiliary bearing 13 is avoided.

第1のシリンダ7Aの上部側開口面は中間仕切板6によって閉成される。第2のシリンダ7Bの下部側開口面は中間仕切板6により、かつ上部側開口面は主軸受け15により閉成される。したがって、第1のシリンダ7A内には、副軸受け13と中間仕切板6によって囲まれる第1のシリンダ室が形成され、第2のシリンダ7B内には中間仕切板6と主軸受け15によって囲まれる第2のシリンダ室が形成される。
第1、第2のシリンダ室には、それぞれ上記回転軸2に一体に設けられる偏心部が収容され、かつこれら偏心部にはローラーが回転自在に嵌め込まれる。なお、第1、第2のシリンダ室と偏心部およびローラーは図示していない。
The upper opening surface of the first cylinder 7 </ b> A is closed by the intermediate partition plate 6. The lower opening surface of the second cylinder 7 </ b> B is closed by the intermediate partition plate 6, and the upper opening surface is closed by the main bearing 15. Accordingly, a first cylinder chamber surrounded by the sub bearing 13 and the intermediate partition plate 6 is formed in the first cylinder 7A, and surrounded by the intermediate partition plate 6 and the main bearing 15 in the second cylinder 7B. A second cylinder chamber is formed.
Each of the first and second cylinder chambers accommodates eccentric portions integrally provided on the rotary shaft 2, and a roller is rotatably fitted in these eccentric portions. The first and second cylinder chambers, the eccentric portion, and the roller are not shown.

回転軸2の回転にともなって、それぞれのシリンダ室では回転軸偏心部とローラーが偏心回転をなす。ローラーの周面一部は常に軸方向に沿ってシリンダ室周面と線状に接触し、この接触部分はシリンダ室を二室に区分する。ローラーの回転方向でシリンダ室の区分された一方の室部分には弁機構を備えている。
上記主軸受け15は、第2のシリンダ7Bの上端開口面を閉成するフランジ部15aと、このフランジ部から回転軸2に沿い上方へ一体に突設され、後述するように内径部で回転軸2の一部を回転自在に軸支し、外径部に上記電動機部4を構成する固定子9が圧入固定されるボス部15bとから構成される。
As the rotary shaft 2 rotates, the rotary shaft eccentric portion and the roller rotate eccentrically in each cylinder chamber. A part of the peripheral surface of the roller always makes a linear contact with the peripheral surface of the cylinder chamber along the axial direction, and this contact portion divides the cylinder chamber into two chambers. One chamber portion of the cylinder chamber divided in the rotation direction of the roller is provided with a valve mechanism.
The main bearing 15 is provided with a flange portion 15a that closes the upper end opening surface of the second cylinder 7B, and protrudes upward integrally from the flange portion along the rotary shaft 2. 2 includes a boss portion 15b in which a stator 9 constituting the electric motor portion 4 is press-fitted and fixed to an outer diameter portion.

なお主軸受けボス部15bについて説明すると、この外径部は固定子9の中心軸に沿って設けられる取付け用孔(孔部)9a直径と略同一もしくは僅かに大に形成され、固定子2の取付け用孔9aが圧入される。図では、主軸受けボス部15b上端縁が固定子9上端面よりも僅かに低い位置にあるが、これに限定されるものではなく、ボス部上端縁を固定子上端面と略同一位置まで延長してもよい。
換言するならば、上記主軸受けボス部15bは固定子9の下方から延出されていて、固定子取付け用孔9aがほとんど全長に亘って主軸受けボス部15bの外径部に嵌め込まれる。したがって、主軸受け15の固定子9に対する支持精度の確保を得られる。
The main bearing boss portion 15b will be described. This outer diameter portion is formed to be approximately the same as or slightly larger than the diameter of a mounting hole (hole) 9a provided along the central axis of the stator 9, and The mounting hole 9a is press-fitted. In the drawing, the upper end edge of the main bearing boss portion 15b is at a position slightly lower than the upper end surface of the stator 9, but this is not restrictive, and the upper end edge of the boss portion extends to substantially the same position as the upper end surface of the stator. May be.
In other words, the main bearing boss portion 15b extends from below the stator 9, and the stator mounting hole 9a is fitted into the outer diameter portion of the main bearing boss portion 15b over almost the entire length. Therefore, it is possible to secure the support accuracy of the main bearing 15 for the stator 9.

また、主軸受けボス部15bの内径部は、ボス部上端縁から固定子9下端面の下方部位までに亘って回転軸2周面と間隙を存するよう形成される。本来、主軸受け15は回転軸2を回転自在に軸支するために備えられるので、主軸受けの全長に亘って回転軸を軸支するのが通常の構成である。ところが、ここではあえて主軸受けボス部15bの内径部を回転軸2周面と間隙を存して形成しており、この間隙部分を空間逃げ部17と呼ぶ。
すなわち、上記空間逃げ部17を設けることによって、主軸受けボス部15bは回転軸2に対する非摺接部を備えていて、空間逃げ部と対向する部位は回転軸と全く摺接しない。空間逃げ部17の上端は開放され、空間逃げ部下端は固定子9下端面よりも下方にある。
Further, the inner diameter portion of the main bearing boss portion 15b is formed so as to have a gap with the circumferential surface of the rotary shaft 2 from the upper end edge of the boss portion to the lower portion of the lower end surface of the stator 9. Originally, the main bearing 15 is provided to rotatably support the rotary shaft 2, so that the normal configuration is to support the rotary shaft over the entire length of the main bearing. However, here, the inner diameter portion of the main bearing boss portion 15b is intentionally formed with a clearance from the circumferential surface of the rotating shaft 2, and this gap portion is called a space escape portion 17.
That is, by providing the space escape portion 17, the main bearing boss portion 15 b has a non-sliding contact portion with respect to the rotation shaft 2, and a portion facing the space escape portion does not slide at all with the rotation shaft. The upper end of the space escape portion 17 is opened, and the lower end of the space escape portion is below the lower end surface of the stator 9.

図2に拡大して示すように、主軸受けボス部15bは断面凹状の容器と同一構成となり、空間逃げ部17に潤滑油を集溜することが可能である。上記主軸受けボス部15bにおいて、空間逃げ部17の下端から所定距離Lを存した部位に、空間逃げ部17と主軸受けボス部15bの外径部とを連通する、小孔からなる油逃し孔18が設けられる。
再び図1に示すように、上記油逃し孔18は主軸受けボス部15bの外径部に取付けられる固定子9の下端面から露出するよう設けられていて、密閉ケース1内に開放する。
As shown in an enlarged view in FIG. 2, the main bearing boss portion 15 b has the same configuration as a container having a concave cross section, and the lubricating oil can be collected in the space escape portion 17. In the main bearing boss portion 15b, an oil relief hole composed of a small hole that communicates the space escape portion 17 and the outer diameter portion of the main bearing boss portion 15b with a portion at a predetermined distance L from the lower end of the space escape portion 17. 18 is provided.
As shown in FIG. 1 again, the oil relief hole 18 is provided so as to be exposed from the lower end surface of the stator 9 attached to the outer diameter portion of the main bearing boss portion 15 b and opens into the sealed case 1.

一方、回転軸2の上端部は固定子9の上端面よりも上方へ突出していて、この上端部に上記傘型回転子10が取付けられる。傘型回転子10は、回転軸2の上端面に取付けボルト20を介して取付けられる傘部10Aと、傘部に一体に設けられる回転子部10Bとから構成される。
上記傘部10Aは、中心部位である回転軸2に対する取付け部分から径方向へ延出され、固定子9外周面と所定間隔を存した位置で、固定子外周面と並行に折曲形成される。上記回転子部10Bは、傘部10Aの固定子9外周面と並行な部位に一体に取付けられ、内周面が固定子9外周面と所定(狭小)の間隙を存するように配置される円環状をなす。回転子部10Bは、通常の電動機部を構成する回転子と同一素材および同一構成をなす、回転子そのものである。
On the other hand, the upper end portion of the rotating shaft 2 protrudes upward from the upper end surface of the stator 9, and the umbrella-shaped rotor 10 is attached to the upper end portion. The umbrella-type rotor 10 includes an umbrella portion 10A attached to the upper end surface of the rotary shaft 2 via attachment bolts 20 and a rotor portion 10B provided integrally with the umbrella portion.
The umbrella portion 10A extends in a radial direction from a mounting portion with respect to the rotation shaft 2 that is a central portion, and is bent in parallel with the outer peripheral surface of the stator at a position spaced apart from the outer peripheral surface of the stator 9. . The rotor portion 10B is integrally attached to a portion parallel to the outer peripheral surface of the stator 9 of the umbrella portion 10A, and is arranged so that the inner peripheral surface has a predetermined (narrow) gap with the outer peripheral surface of the stator 9. Make a ring. The rotor portion 10B is a rotor itself that has the same material and the same configuration as the rotor that constitutes a normal electric motor portion.

上記回転子部10Bは、上部ケース1Bの内周壁と所定間隔を存して対向する部位にある。上述したように密閉ケース1は、下部ケース1Aの上端外径部に上部ケース1Bの下端内径部が嵌め込まれるところから、回転子部10Bと上部ケース1B内壁面との間に寸法的な余裕があり、設計上および組立て上、有利な構成となっている。
一方、上記固定子9を構成するコイル部9bは、下部ケース1Aに取付けられる給電部21と電源コード22を介して電気的に接続される。上記給電部21を下部ケース1Aに取付けたから、下部ケースに上部ケース1Bを取付ける以前の状態、すなわち下部ケース1Aの上端が開放した状態で給電部21と固定子9との間に亘って電源コード22の接続作業ができ、作業性のより簡単化を図れる。
The rotor portion 10B is located at a portion facing the inner peripheral wall of the upper case 1B with a predetermined interval. As described above, the sealed case 1 has a dimensional margin between the rotor portion 10B and the inner wall surface of the upper case 1B since the lower end inner diameter portion of the upper case 1B is fitted into the upper end outer diameter portion of the lower case 1A. There is an advantageous configuration in terms of design and assembly.
On the other hand, the coil part 9b which comprises the said stator 9 is electrically connected via the electric power feeding part 21 and the power cord 22 which are attached to 1 A of lower cases. Since the power feeding unit 21 is attached to the lower case 1A, the power cord is connected between the power feeding unit 21 and the stator 9 in a state before the upper case 1B is attached to the lower case, that is, in a state where the upper end of the lower case 1A is opened. 22 connection operations can be performed, and the workability can be further simplified.

このようにして構成される密閉型圧縮機であって、給電部21を介して固定子9に駆動信号が入力され傘型回転子10が回転駆動される。傘型回転子10と一体に連結される回転軸2が回転して、回転軸の偏心部およびローラーが第1のシリンダ室と第2のシリンダ室において偏心回転する。それにともない、冷媒ガスは図示しない吸込み管を介して第1、第2のシリンダ室に吸込まれ、かつ圧縮されて密閉ケース1内に充満し図示しない吐出管を介して吐出される。
さらに、回転軸2の回転にともなって下部ケース1Aの油溜り部14から潤滑油が吸い上げられ、圧縮機構部3の各摺動部に給油される。したがって、圧縮機構部3では潤滑性が確保される。各摺動部に給油された潤滑油の一部はそのまま油溜り部14に戻り、一部は油粒子となって密閉ケース1内に浮遊し、密閉ケース1内壁面や傘型回転子10周面接触して油滴に変り、かつ流下する。
In the hermetic compressor configured as described above, a drive signal is input to the stator 9 via the power feeding unit 21 and the umbrella-shaped rotor 10 is rotationally driven. The rotating shaft 2 connected integrally with the umbrella-shaped rotor 10 rotates, and the eccentric portion and the roller of the rotating shaft rotate eccentrically in the first cylinder chamber and the second cylinder chamber. Accordingly, the refrigerant gas is sucked into the first and second cylinder chambers through a suction pipe (not shown), is compressed, fills the sealed case 1, and is discharged through a discharge pipe (not shown).
Further, as the rotary shaft 2 rotates, the lubricating oil is sucked up from the oil reservoir 14 of the lower case 1 </ b> A and supplied to each sliding portion of the compression mechanism unit 3. Accordingly, the compression mechanism 3 ensures lubricity. Part of the lubricating oil supplied to each sliding part returns to the oil reservoir 14 as it is, and part of the lubricating oil floats in the sealed case 1 as oil particles, and the inner wall surface of the sealed case 1 and the umbrella-shaped rotor 10 rounds. It comes into contact with the surface and turns into oil droplets and then flows down.

同時に、主軸受け15内周面と回転軸2の外周面間の周胴部を潤滑した潤滑油は、主軸受けボス部15bの内径に形成される空間逃げ部17の底部から、この空間逃げ部17に流入し、図2に示すように、ここに一旦溜る。
しかしながら、空間逃げ部17下部には小孔からなる油逃し孔18が設けられているので、空間逃げ部17に溜った潤滑油は油逃し孔18を介して徐々に流出し、ついには油溜り部14に戻る。圧縮作用が継続する限り、油溜り部14の潤滑油は再び吸上げられ、圧縮機構部3の各摺動部に給油される。
At the same time, the lubricating oil that has lubricated the peripheral body between the inner peripheral surface of the main bearing 15 and the outer peripheral surface of the rotary shaft 2 passes from the bottom of the space escape portion 17 formed on the inner diameter of the main bearing boss portion 15b to the space escape portion 17. It flows in and temporarily accumulates here as shown in FIG.
However, since the oil escape hole 18 composed of a small hole is provided at the lower portion of the space escape portion 17, the lubricating oil accumulated in the space escape portion 17 gradually flows out through the oil escape hole 18 and finally the oil sump. Return to part 14. As long as the compression action continues, the lubricating oil in the oil reservoir 14 is sucked up again and supplied to the sliding portions of the compression mechanism 3.

油溜り部14には常に給油されていった潤滑油が円滑に戻るので、圧縮作用中は勿論のこと、圧縮作用を一旦停止した後の再起動時もしくは朝一番の起動時においても、各摺動部における潤滑特性が確実に保持される。
特に起動時に、空間逃げ部17に多量の潤滑油が溜っていないから、ここから潤滑油が吹き上がることがなく、したがって吐出管を介して外部へ吐油されることもない。また、過渡状態等で圧縮機内全体の油面低下があったときには、上記空間逃げ部17の底部から油逃し孔18までの高さLの部分に溜まった潤滑油により、主軸受け15と回転軸2間の潤滑を行うことができ、給油元である油溜り部14から最も離れた摺動部においても油切れ現象がない。
Since the lubricating oil always supplied to the oil reservoir 14 returns smoothly, not only during the compression operation, but also at the time of restart after temporarily stopping the compression operation or at the start of the morning, Lubrication characteristics in the moving part are reliably maintained.
In particular, at the time of start-up, since a large amount of lubricating oil does not accumulate in the space escape portion 17, the lubricating oil does not blow up from here, and therefore is not discharged to the outside through the discharge pipe. Further, when the oil level in the entire compressor is lowered due to a transient state or the like, the main bearing 15 and the rotating shaft are caused by the lubricating oil accumulated at the height L from the bottom of the space escape portion 17 to the oil relief hole 18. 2 can be lubricated, and there is no oil shortage phenomenon even in the sliding part farthest from the oil sump 14 as the oil supply source.

一方、このような密閉型圧縮機の組立て時にあたって、主軸受けボス部15bの外径部に固定子9を圧入固定するが、主軸受けボス部の内径部に空間逃げ部17を設けることにより、主軸受け15と固定子9との圧入部分に対して、主軸受けと回転軸2とが非摺接状態となる。
そのため、主軸受けボス部15bに固定子9を圧入する際に発生し易い圧入ストレスにより、主軸受けボス部15bの内径部変形が生じても、回転軸2に対する影響がなく、軸信頼性を確保する。主軸受けボス部15bの外径部と内径部との同軸度が保持され、組立て時に固定子9と傘型回転子10に傾きやズレが生じることなく、調芯作業が不要で生産性の向上を図れる。
On the other hand, when assembling such a hermetic compressor, the stator 9 is press-fitted and fixed to the outer diameter portion of the main bearing boss portion 15b, but by providing the space escape portion 17 on the inner diameter portion of the main bearing boss portion, The main bearing and the rotary shaft 2 are brought into a non-sliding contact state with respect to the press-fitted portion between the main bearing 15 and the stator 9.
Therefore, even if deformation of the inner diameter portion of the main bearing boss portion 15b occurs due to press-fitting stress that is likely to occur when the stator 9 is press-fitted into the main bearing boss portion 15b, the rotation shaft 2 is not affected, and the shaft reliability is ensured. To do. The coaxiality between the outer diameter part and the inner diameter part of the main bearing boss part 15b is maintained, the stator 9 and the umbrella-type rotor 10 are not tilted or misaligned at the time of assembly, and alignment work is unnecessary and productivity is improved. Can be planned.

図3は、第2の実施の形態における密閉型圧縮機の要部の断面図である。
すなわち、ここでは固定子9と、回転軸2Aの一部および主軸受けボス部15b1の一部のみを示していて、図示しない他の構成部品は全て先に図1で説明したものと同一であるので、新たな説明は省略する。
第2の実施の形態における主たる特徴は、主軸受けボス部15b1の外径部に固定子9の取付け用孔9aに圧入固定される複数の圧入固定部23が設けられる。そして、これら圧入固定部23の相互間には、固定子取付け用孔9a周面とは間隙を存するよう形成される逃げ用凹部24が設けられることである。
このように、主軸けボス部15b1の外径部に複数の圧入固定部23を所定間隔を存して設け、これら圧入固定部の相互間に逃げ用凹部24を設けたので、固定子9を主軸受けボス部15b1に圧入する際の圧入力を低減でき、圧入作業性が向上するとともに、圧入スパーンは十分に取れるから、圧入部分の倒れを防止して組立て精度の確保を図れる。
また、上記回転軸2Aの、図における圧入固定部23と対応する略中央部は直径が細い細径部22となっていて、主軸受けボス部15b1の内径部と間隙を存している。主軸受けボス部15b1の上部においても、圧入固定部23と対応する内径部が凹陥形成される。したがって、圧入ストレスにより主軸受け内径部の変形が生じても回転軸2に対する影響はない。
FIG. 3 is a cross-sectional view of a main part of the hermetic compressor according to the second embodiment.
That is, here, only the stator 9, a part of the rotating shaft 2A, and a part of the main bearing boss part 15b1 are shown, and all other components not shown are the same as those described above with reference to FIG. Therefore, new explanation is omitted.
The main feature of the second embodiment is that a plurality of press-fit fixing portions 23 that are press-fitted and fixed in the mounting holes 9a of the stator 9 are provided on the outer diameter portion of the main bearing boss portion 15b1. Between the press-fit fixing portions 23, there is provided a relief recess 24 formed so as to have a gap from the peripheral surface of the stator mounting hole 9a.
As described above, since the plurality of press-fit fixing portions 23 are provided at predetermined intervals on the outer diameter portion of the main shaft boss portion 15b1, and the relief recesses 24 are provided between the press-fit fixing portions, the stator 9 is The pressure input when the main bearing boss 15b1 is press-fitted can be reduced, the press-fitting workability is improved, and the press-fitting span can be sufficiently taken, so that the press-fitting part can be prevented from collapsing and assembling accuracy can be secured.
Further, the substantially central portion of the rotating shaft 2A corresponding to the press-fit fixing portion 23 in the drawing is a narrow-diameter portion 22 having a small diameter, and has a gap with the inner diameter portion of the main bearing boss portion 15b1. Also in the upper part of the main bearing boss portion 15b1, an inner diameter portion corresponding to the press-fit fixing portion 23 is formed as a recess. Therefore, even if the main bearing inner diameter portion is deformed by the press-fitting stress, there is no influence on the rotating shaft 2.

図4は、第3の実施の形態を示す密閉型圧縮機の断面図である。
ここでは、後述するように回転軸2にバランサ25が取付けられることと、回転軸に対する固定子9のバランス構造を備えていることが、先に図1に示した密閉型圧縮機と相違する。他の構成部品は全て同一なので、同番号を付して新たな説明は省略する。
上記圧縮機構部3における下部側の第1のシリンダ7Aと上部側の第2のシリンダ7B内に収容される回転軸2の偏心部およびローラーは、上述したように回転軸中心に対して所定方向に偏心している。実際に、第1のシリンダ7A内の偏心部およびローラーが回転軸2の中心軸CLに対してたとえば図の右側に偏心している場合、第2のシリンダ7B内の偏心部およびローラーは回転軸2の中心軸CLに対して図の左側に偏心している。回転軸2の上部にはバランサ25が取付けられる。上記バランサ25は回転軸2の中心軸CLに対して図の左側に重心位置がくるよう偏心している。
FIG. 4 is a cross-sectional view of a hermetic compressor showing a third embodiment.
Here, the balancer 25 is attached to the rotating shaft 2 as described later, and the balance structure of the stator 9 with respect to the rotating shaft is different from the hermetic compressor shown in FIG. Since all other components are the same, the same numbers are assigned and new descriptions are omitted.
The eccentric part and the roller of the rotating shaft 2 housed in the first cylinder 7A on the lower side and the second cylinder 7B on the upper side in the compression mechanism unit 3 are in a predetermined direction with respect to the center of the rotating shaft as described above. Eccentric. Actually, when the eccentric portion and the roller in the first cylinder 7A are eccentric to the right side of the drawing with respect to the central axis CL of the rotating shaft 2, for example, the eccentric portion and the roller in the second cylinder 7B are the rotating shaft 2. Is eccentric to the left side of the figure with respect to the central axis CL. A balancer 25 is attached to the upper part of the rotating shaft 2. The balancer 25 is eccentric so that the center of gravity is located on the left side of the drawing with respect to the central axis CL of the rotary shaft 2.

上記傘型回転子10はバランサとしても機能させる。なお説明すると、図4のA−B線に沿う断面図を、図5(A)もしくは(B)に示している。
図5(A)は、回転軸2中心に対して所定方向Sに所定量aだけ偏心するよう、傘型回転子10の傘部10Aを取付けボルト20を介して取付ける。この傘型回転子10を取付けるための所定方向とは、当然、回転軸の回転アンバランスを打ち消す方向であり、図4の右方向である。
すなわち、傘型回転子10は回転軸2への取付け部から固定子9の外周側へ延出される構成であり、回転半径が大きいため、僅かな偏心量でも回転軸2に対する影響が大である。したがって、実際には1mm以下の微小な偏心量でもアンバランスをキャンセルでき、固定子9外周面と回転子部10b内周面との間隔のズレを極く僅かに抑えて、回転性能に何らの影響もない。
The umbrella-shaped rotor 10 also functions as a balancer. If it demonstrates, sectional drawing which follows the AB line | wire of FIG. 4 is shown to FIG. 5 (A) or (B).
5A, the umbrella portion 10A of the umbrella-type rotor 10 is attached via the attachment bolt 20 so as to be eccentric by a predetermined amount a in the predetermined direction S with respect to the center of the rotary shaft 2. FIG. Naturally, the predetermined direction for attaching the umbrella-shaped rotor 10 is a direction to cancel the rotational imbalance of the rotating shaft, and is the right direction in FIG.
That is, the umbrella-shaped rotor 10 is configured to extend from the attachment portion to the rotating shaft 2 to the outer peripheral side of the stator 9 and has a large rotation radius, so that even a slight amount of eccentricity has a great influence on the rotating shaft 2. . Therefore, in practice, the imbalance can be canceled even with a minute eccentric amount of 1 mm or less, and the deviation of the distance between the outer peripheral surface of the stator 9 and the inner peripheral surface of the rotor portion 10b is suppressed to a slight extent, so There is no effect.

複数のシリンダ(圧縮部)7A,7Bを備えた圧縮機構部3を構成する密閉型圧縮機でありながら、傘型回転子10に先行技術のような複数のバランサを取付ける必要がなく、しかもバランサの取付け位置を選択せずにすみ、回転軸2の回転にともなう振動を確実に低減できる。
そして、上述の構成では傘型回転子10を組み込む際に、傘型回転子と回転軸2との間の調芯を行って偏心量aを正確に出すが、これに限定されるものではなく、傘型回転子10の仕上がり精度を予めa寸法ずらして、調芯なしでも同様の作用効果が得られる。
Although it is a hermetic compressor constituting the compression mechanism section 3 having a plurality of cylinders (compression sections) 7A and 7B, it is not necessary to attach a plurality of balancers to the umbrella rotor 10 as in the prior art, and the balancer Therefore, the vibration associated with the rotation of the rotary shaft 2 can be reliably reduced.
In the above-described configuration, when the umbrella-shaped rotor 10 is incorporated, the alignment between the umbrella-shaped rotor and the rotary shaft 2 is performed to accurately output the eccentricity a, but this is not a limitation. The same effect can be obtained without aligning the finishing accuracy of the umbrella rotor 10 by shifting the dimension a in advance.

図5(B)は、その具体的な構造例である。すなわち、先に図5(A)で説明した傘型回転子10の傘部10Aは全周に亘って均一な肉厚をなすが、ここでは傘部10Aaの内径部中心が回転軸2中心と一致し、傘部10Aaの外径部中心が偏心方向にずれている。結果として、傘部10Aaが偏心方向に厚い偏肉構造をなしている。
この場合においても、先に説明したように、複数のシリンダ7A,7Bを備えた圧縮機構部3でありながら、傘型回転子10の傘部10Aaに先行技術のように複数のバランサを取付けることなく、しかもバランサの取付け位置を選択することもなく、回転軸2の回転にともなう振動を確実に低減できる。
FIG. 5B shows a specific example of the structure. That is, the umbrella portion 10A of the umbrella-shaped rotor 10 described above with reference to FIG. 5A has a uniform thickness over the entire circumference, but here, the center of the inner diameter portion of the umbrella portion 10Aa is the center of the rotary shaft 2. And the center of the outer diameter portion of the umbrella portion 10Aa is shifted in the eccentric direction. As a result, the umbrella portion 10Aa has a thick thickness structure in the eccentric direction.
Even in this case, as described above, a plurality of balancers are attached to the umbrella portion 10Aa of the umbrella-type rotor 10 as in the prior art, although the compression mechanism portion 3 includes the plurality of cylinders 7A and 7B. In addition, the vibration associated with the rotation of the rotary shaft 2 can be reliably reduced without selecting the mounting position of the balancer.

なお、図5(B)に示す構造では傘部10Aaの内径部中心を回転軸2中心と一致させたと説明したが、これに限定されるものではなく、傘部10Aaの内径部中心を回転軸2中心とはずらして、偏心させてもよい。
当然、傘部10Aaの外径部中心が偏心方向にずれることは変りがなく、結果として、傘部10Aaが偏心方向に厚い偏肉構造をなすことも同様である。この場合、より大きなバランス重量が得られる。
In the structure shown in FIG. 5B, it has been described that the center of the inner diameter portion of the umbrella portion 10Aa is made to coincide with the center of the rotary shaft 2. However, the present invention is not limited to this. The center may be deviated from the center.
Naturally, the center of the outer diameter portion of the umbrella portion 10Aa does not change in the eccentric direction, and as a result, the umbrella portion 10Aa has a thick wall thickness structure in the eccentric direction. In this case, a larger balance weight can be obtained.

図6は、第4の実施の形態の密閉型圧縮機の断面図を示す。
後述するバランス構造を除いて他の構成部品は全て同一構造をなしているので、同番号を付して新たな説明を省略する。
ここでは、第1のバランサ30と、第2のバランサ40が回転軸2に取付けられることを特徴としている。第1のバランサ30を取付けるために、回転軸2を軸支する主軸受けボス部15b2が固定子9の取付け用孔9a下部で切れている。すなわち、第1のバランサ30は主軸受けボス部15b2上端で、かつ固定子取付け用孔9a内に位置することになる。上記第2のバランサ40は、傘型回転子10の傘部10A中心に設けられ内径部が回転軸2上端に嵌着固定される。
FIG. 6 is a sectional view of a hermetic compressor according to the fourth embodiment.
Since all the other components have the same structure except for the balance structure described later, the same reference numerals are given and new descriptions are omitted.
Here, the first balancer 30 and the second balancer 40 are attached to the rotary shaft 2. In order to mount the first balancer 30, the main bearing boss portion 15 b 2 that supports the rotating shaft 2 is cut at the lower portion of the mounting hole 9 a of the stator 9. That is, the first balancer 30 is positioned at the upper end of the main bearing boss portion 15b2 and in the stator attachment hole 9a. The second balancer 40 is provided at the center of the umbrella portion 10 </ b> A of the umbrella-type rotor 10, and an inner diameter portion is fitted and fixed to the upper end of the rotary shaft 2.

第1のバランサ30および第2のバランサ40とも、偏心ボス形状をなしている。上記第1のバランサ30が回転軸2中心から図において右側に偏心しているのに対して、上記第2のバランサ40は回転軸2中心から図において左側に偏心している。
このようにして、回転軸2の回転バランスをとるため、2個(少なくとも1つ、もしくはそれ以上)のバランサ30,40を回転軸2に直接取付けた。径が大きい傘型回転子10の傘部10Aに先行技術のように複数のバランサを取付けると、バランサ重量のバラツキによって回転アンバランスが生じ易い。インバータ制御により高回転運転されると、振れが大きくなる。その結果、回転軸2に異常な負荷がかかり、圧縮機構部3における摺動部に摩擦抵抗が発生する可能性が大である。
Both the first balancer 30 and the second balancer 40 have an eccentric boss shape. The first balancer 30 is eccentric from the center of the rotating shaft 2 to the right in the figure, whereas the second balancer 40 is eccentric from the center of the rotating shaft 2 to the left in the figure.
In this way, in order to balance the rotation of the rotating shaft 2, two (at least one or more) balancers 30 and 40 were directly attached to the rotating shaft 2. When a plurality of balancers are attached to the umbrella portion 10A of the umbrella rotor 10 having a large diameter as in the prior art, rotational imbalance is likely to occur due to variations in the balancer weight. When high-speed operation is performed by inverter control, the shake increases. As a result, there is a high possibility that an abnormal load is applied to the rotary shaft 2 and a frictional resistance is generated in the sliding portion of the compression mechanism portion 3.

しかしながら、上述のように構成すれば、複数のバランサ30,40を剛体である回転軸2に直付けでき、組込み誤差が少なくてすむ。各バランサ30,40を回転中心から短い距離位置に取付けられるので、風損による損失が少なくてすみ、バランサ重量の絶対重量を大きくできて製造誤差が許容し易い。
また、第1のバランサ30を主軸受けボス部15b2上端で、かつ固定子取付け用孔9a内の回転軸2に取付けたから、密閉ケース1内のスペースを有効活用でき、その結果、圧縮機の小型化を図れる。第2のバランサ40を傘型回転子10の傘部10A中心に設けて、傘型回転子の構成部材としたから、特にバランサの取付け位置の設定に神経を使う必要がなく、作業性の向上を図れる。
However, if constituted as described above, a plurality of balancers 30 and 40 can be directly attached to the rotating shaft 2 which is a rigid body, and an assembling error can be reduced. Since each balancer 30, 40 can be mounted at a short distance from the center of rotation, loss due to windage can be reduced, the absolute weight of the balancer can be increased, and manufacturing errors are easily tolerated.
Further, since the first balancer 30 is attached to the upper end of the main bearing boss portion 15b2 and the rotary shaft 2 in the stator attachment hole 9a, the space in the sealed case 1 can be used effectively, and as a result, the compressor can be made compact. Can be realized. Since the second balancer 40 is provided at the center of the umbrella portion 10A of the umbrella-type rotor 10 and is used as a constituent member of the umbrella-type rotor, it is not particularly necessary to use a nerve to set the mounting position of the balancer, thereby improving workability. Can be planned.

なお、この実施の形態における構造を採用すると、第1のバランサ30を軸受けボス部15b2上端の回転軸2部位に取付けることになり、その結果、第1のバランサ30が回転軸2のスラスト荷重受けとして機能する。これに対して先行技術では第1のシリンダ下面部に取付けられる副軸受けが回転軸偏心部下端を支持し、回転軸のスラスト荷重受けとして機能する。すなわち、スラスト受けが圧縮作用をなすシリンダ室に対向して設けられることになる。
新品状態の圧縮機で見られる現象として摩耗粉の発生があるが、先行技術の構成では、この摩耗粉が副軸受けと回転軸偏心部下端面との間のスラスト受け面に侵入してダメージを与え、性能低下が生じる可能性がある。さらに、回転軸偏心部下端面は略三日月形状であるため、潤滑性を確保し難い。
しかしながら、本発明の第4の実施の形態のような構成を採用し、主軸受けボス部15b2上の第1のバランサ30をスラスト受けとすることによって、たとえ摩耗粉が発生してもシリンダ室への侵入がなく、性能低下を防止できる。また、バランサ30は環状であるため、片当りし難い。
If the structure in this embodiment is adopted, the first balancer 30 is attached to the rotary shaft 2 at the upper end of the bearing boss portion 15b2, and as a result, the first balancer 30 receives the thrust load of the rotary shaft 2. Function as. On the other hand, in the prior art, the auxiliary bearing attached to the first cylinder lower surface portion supports the lower end of the rotating shaft eccentric portion and functions as a thrust load receiver of the rotating shaft. That is, the thrust receiver is provided to face the cylinder chamber that performs the compression action.
As a phenomenon seen in a new compressor, wear powder is generated, but in the configuration of the prior art, this wear powder penetrates into the thrust receiving surface between the sub-bearing and the lower end surface of the rotating shaft eccentric part and causes damage. There is a possibility of performance degradation. Furthermore, since the lower end surface of the rotating shaft eccentric portion has a substantially crescent shape, it is difficult to ensure lubricity.
However, by adopting the configuration as in the fourth embodiment of the present invention and using the first balancer 30 on the main bearing boss portion 15b2 as a thrust receiver, even if wear powder is generated, the cylinder chamber is moved to. Intrusion can be prevented and performance degradation can be prevented. Moreover, since the balancer 30 is annular, it is difficult to hit each other.

本発明における第1の実施の形態に係る、密閉型圧縮機の断面図。1 is a cross-sectional view of a hermetic compressor according to a first embodiment of the present invention. 同実施の形態に係る、要部の断面図。Sectional drawing of the principal part based on the embodiment. 本発明における第2の実施の形態に係る、密閉型圧縮機の一部断面図。The partial cross section figure of the hermetic type compressor concerning a 2nd embodiment in the present invention. 本発明における第3の実施の形態に係る、密閉型圧縮機の断面図。Sectional drawing of the hermetic type compressor based on 3rd Embodiment in this invention. 同実施の形態に係る、図4のA−B線に沿う断面図であり、互いに異なる構成図。It is sectional drawing which follows the AB line | wire of FIG. 4 based on the embodiment, and a mutually different block diagram. 本発明における第4の実施の形態に係る、密閉型圧縮機の断面図。Sectional drawing of the hermetic type compressor based on 4th Embodiment in this invention.

符号の説明Explanation of symbols

1…密閉ケース、2…回転軸、3…圧縮機構部、4…電動機部、5…電動圧縮機本体、15…主軸受け、9a…取付け用孔(固定子孔部)、9…固定子、10…傘型回転子、17…空間逃げ部、18…油逃し孔、21…圧入固定部、22…逃げ用凹部、7A…第1のシリンダ、7B…第2のシリンダ。   DESCRIPTION OF SYMBOLS 1 ... Sealing case, 2 ... Rotating shaft, 3 ... Compression mechanism part, 4 ... Electric motor part, 5 ... Electric compressor main body, 15 ... Main bearing, 9a ... Mounting hole (stator hole part), 9 ... Stator, DESCRIPTION OF SYMBOLS 10 ... Umbrella type rotor, 17 ... Space escape part, 18 ... Oil relief hole, 21 ... Press-fit fixing part, 22 ... Recessed recessed part, 7A ... 1st cylinder, 7B ... 2nd cylinder

Claims (3)

密閉ケース内に、回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容する密閉型圧縮機において、
上記圧縮機構部は、上記回転軸を軸支する軸受けを備え、
上記電動機部は、上記軸受けの外径部に圧入固定される孔部を備えた固定子と、上記回転軸に取付けられ、上記固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、
上記軸受けの内径部に、上記回転軸周面と間隙を存する空間逃げ部が設けられるとともに、この空間逃げ部と軸受け外径部とを連通し密閉ケース内に開放する油逃し孔が設けられることを特徴とする密閉型圧縮機。
In a hermetic compressor that accommodates an electric compressor main body formed by connecting a compression mechanism part and an electric motor part via a rotating shaft in a hermetic case,
The compression mechanism includes a bearing that supports the rotation shaft,
The motor section includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and an umbrella type that is attached to the rotating shaft and extends so as to have a predetermined gap from the outer peripheral surface of the stator. Consists of a so-called outer rotor type electric motor part consisting of a rotor,
A space escape portion is provided in the inner diameter portion of the bearing so as to leave a gap with the peripheral surface of the rotating shaft, and an oil escape hole is provided to open the inside of the sealed case by communicating the space escape portion and the outer diameter portion of the bearing. A hermetic compressor characterized by
密閉ケース内に、回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容する密閉型圧縮機において、
上記圧縮機構部は、上記回転軸を軸支する軸受けを備え、
上記電動機部は、上記軸受けの外径部に圧入固定される孔部を備えた固定子と、上記回転軸に取付けられ、上記固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、
上記軸受けの外径部は、この軸方向に沿い互いに所定間隔を存して設けられ上記固定子の孔部に圧入固定される複数の圧入固定部と、これら複数の圧入固定部の相互間に設けられ固定子と間隙を存する逃げ用凹部とを備えたことを特徴とする密閉型圧縮機。
In a hermetic compressor that accommodates an electric compressor main body formed by connecting a compression mechanism part and an electric motor part via a rotating shaft in a hermetic case,
The compression mechanism includes a bearing that supports the rotation shaft,
The motor section includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and an umbrella type that is attached to the rotating shaft and extends so as to have a predetermined gap from the outer peripheral surface of the stator. Consists of a so-called outer rotor type electric motor part consisting of a rotor,
The outer diameter portion of the bearing is provided between the plurality of press-fit fixing portions and the plurality of press-fit fixing portions which are provided at predetermined intervals along the axial direction and are press-fitted and fixed in the hole portions of the stator. A hermetic compressor comprising a stator and a recess for escape which is provided with a gap.
密閉ケース内に、回転軸を介して圧縮機構部と電動機部とを連結してなる電動圧縮機本体を収容する密閉型圧縮機において、
上記圧縮機構部は、上記回転軸を軸支する軸受けを備え、
上記電動機部は、上記軸受けの外径部に圧入固定される孔部を備えた固定子と、上記回転軸に取付けられ、上記固定子の外周面と所定の間隙を存するよう延出される傘型回転子とからなる、いわゆるアウターローター型電動機部を構成し、
上記圧縮機構部は、複数のシリンダを備えた、いわゆるロータリー型圧縮機構部であり、
上記回転軸に、回転軸の回転バランスをとるためのバランサを、少なくとも1つ、もしくはそれ以上が取付けられることを特徴とする密閉型圧縮機。
In a hermetic compressor that accommodates an electric compressor main body formed by connecting a compression mechanism part and an electric motor part via a rotating shaft in a hermetic case,
The compression mechanism includes a bearing that supports the rotation shaft,
The motor section includes a stator having a hole that is press-fitted and fixed to the outer diameter portion of the bearing, and an umbrella type that is attached to the rotating shaft and extends so as to have a predetermined gap from the outer peripheral surface of the stator. Consists of a so-called outer rotor type electric motor part consisting of a rotor,
The compression mechanism is a so-called rotary type compression mechanism having a plurality of cylinders,
A hermetic compressor, wherein at least one or more balancers for balancing the rotation shaft are attached to the rotation shaft.
JP2004164767A 2004-06-02 2004-06-02 Hermetic compressor Pending JP2005344600A (en)

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US20170058880A1 (en) * 2014-07-07 2017-03-02 Panasonic Intellectual Property Management Co., Ltd. Sealed compressor and refrigeration device using the same
CN105351200A (en) * 2015-11-16 2016-02-24 安徽美芝精密制造有限公司 Rotary compressor and refrigerating system with same
CN110761967A (en) * 2018-07-27 2020-02-07 广东美芝制冷设备有限公司 Compressor with a compressor housing having a plurality of compressor blades

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