JPH0281987A - Compressor - Google Patents

Abstract

PURPOSE:To decrease an outflow of oil to a refrigerating cycle by connecting a motor with a shaft and providing a communication hole, connecting the upper to communicate with the bottom of an upper end part bearing of the shaft, in only the shaft. CONSTITUTION:A shaft communication hole 22 connects the upper to communicate with the bottom of an upper end part bearing 21 in a shaft. Then oil, finishing lubrication of an upper bearing 4, and oil, delivered with a refrigerant from a delivery hole 14, are allowed to flow in the upper being formed in a mist state but in the upper passing through only the shaft communication hole 22. Consequently, the oil, when it passes through the shaft communication hole 22, is separated by centrifugal force of the shaft 8, scattering in the outside and being allowed to flow in the bottom along a wall surface of a closed casing 1, and only the refrigerant is delivered from a delivery pipe 17 to a refrigerating cycle via the shaft communication hole 22. Accordingly, an outflow of oil is reduced, and seizure in a sliding part and deterioration of ability can be prevented.

Description

【発明の詳細な説明】 産業上の利用分野 本発ａＡは冷凍サイクル等に使用する圧縮機に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a compressor used in a refrigeration cycle or the like.

従来の技術 以下図面を参照しながら、−例として従来のロータリー
型圧縮機について説明する。BACKGROUND OF THE INVENTION A conventional rotary compressor will be described by way of example with reference to the drawings.

第３図は従来のロータリー型圧縮機の断面を示すもので
ある。第３図において、１は密閉ケーシング、２はモー
タ、３は下軸受、４は上軸受、５はシリンダ、６はピス
トン、７はベーン、８はシャ７）、９はシャフト上端に
あるシャフト上端部軸受である。また、１０はシャフト
８の偏心部、１１はシャフト８に設けた給油孔、１２は
シリンダ５とピストン６の間で形成される圧縮室、１３
は圧縮室１２に冷媒を吸入する吸入孔、１４は上軸受４
に設けた吐出孔、１６は吐出弁である。１６は吸入孔１
３と連通ずる吸入管、１７は密閉ケーシング１に設けた
吐出管である。また、１８は下軸受３．上軸受４．シリ
ンダ５．ピストン６で構成された機械部であり、機械部
１８の上部にモータ２が位置し、モータ２の上部にシャ
フト上端部軸受９が位置する構成となっている。また、
シャフト上端部軸受９には冷媒通路１９が設けられ、さ
らに密閉ケーシング１の底部には潤滑油２０が溜まって
いる。FIG. 3 shows a cross section of a conventional rotary compressor. In Figure 3, 1 is a closed casing, 2 is a motor, 3 is a lower bearing, 4 is an upper bearing, 5 is a cylinder, 6 is a piston, 7 is a vane, 8 is a shaft 7), 9 is an upper end of the shaft at the upper end of the shaft It is a partial bearing. Further, 10 is an eccentric portion of the shaft 8, 11 is an oil supply hole provided in the shaft 8, 12 is a compression chamber formed between the cylinder 5 and the piston 6, and 13
14 is a suction hole that sucks refrigerant into the compression chamber 12, and 14 is an upper bearing 4.
16 is a discharge valve. 16 is suction hole 1
3 is a suction pipe that communicates with the casing 1, and 17 is a discharge pipe provided in the sealed casing 1. 18 is the lower bearing 3. Upper bearing 4. Cylinder 5. It is a mechanical part composed of a piston 6, a motor 2 is located above the mechanical part 18, and a shaft upper end bearing 9 is located above the motor 2. Also,
A refrigerant passage 19 is provided in the shaft upper end bearing 9, and lubricating oil 20 is collected at the bottom of the sealed casing 1.

以上のように構成されたロータリー型圧縮機について以
下その動作について説明する。The operation of the rotary compressor configured as above will be explained below.

モータ２．シャフト８の回転に伴って、吸入管１６から
吸入孔１３を掻で吸入された冷媒ガスは圧縮室１２で圧
縮され、吐出孔１４から密閉ケシフグ１内に吐出された
後、冷媒通路１９を通って吐出管１７から冷凍サイク／
Ｉ／（図示せず）に吐出される。Motor 2. As the shaft 8 rotates, the refrigerant gas is sucked in from the suction pipe 16 through the suction hole 13 and is compressed in the compression chamber 12 and discharged from the discharge hole 14 into the sealed keshifugu 1, and then passes through the refrigerant passage 19. from the discharge pipe 17 to the refrigeration cycle/
I/ (not shown).

発明が解決しようとする課題 しかし、」二記構成において、上軸受４を潤滑し終えた
油や、吐出孔１４から吐出された冷媒に含まれた油はミ
スト状になって上方に流れ、吐出管１７から冷凍サイク
ルに油が冷媒とともに吐出されるため、冷凍サイクルに
油が流出してしまい、摺動部の焼きつき、能力の低下と
いう課題を有していた。Problem to be Solved by the Invention However, in the configuration described in Section 2, the oil that has finished lubricating the upper bearing 4 and the oil contained in the refrigerant discharged from the discharge hole 14 flow upward in the form of mist and are discharged. Since oil is discharged from the pipe 17 into the refrigeration cycle together with the refrigerant, the oil leaks into the refrigeration cycle, causing problems such as seizing of sliding parts and reduction in performance.

本発明は上記課題に鑑み、冷凍サイクルへの油流出の少
ない圧縮機を提供するものである。In view of the above problems, the present invention provides a compressor that causes less oil leakage into the refrigeration cycle.

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の圧縮機は、密閉ケー
シング内に機械部と前記機械部の上部にモータを備える
とともに前記機械部と前記モータをシャフトで連結し、
前記シャフト上端部を支持するシャフト上端部軸受を設
け、前記シャフトにのみ、前記シャフト上端部軸受の上
方と下方を連通ずる連通穴を設けたものである。Means for Solving the Problems In order to solve the above problems, the compressor of the present invention includes a mechanical part in a sealed casing and a motor above the mechanical part, and connects the mechanical part and the motor with a shaft,
A shaft upper end bearing that supports the shaft upper end is provided, and a communication hole is provided only in the shaft to communicate between the upper and lower parts of the shaft upper end bearing.

作　　　用 本発明は上記した構成によって、上軸受を潤滑し終えた
油や、吐出孔から冷媒とともに吐出された油はミスト状
になって上方に流れるが、シャフトの連通穴を通過する
時に、シャフトの回転にともなって発生する遠心力で油
が分離して外側に飛び密閉ケーシング壁面を伝って下方
に流れ、冷媒のみがシャフト連通穴を経て吐出管から冷
凍サイクルに吐出されるため、油流出を低減でき、摺動
部の焼きつき、能力の低下を防止することができる。According to the above-described structure, the oil that has finished lubricating the upper bearing and the oil that has been discharged from the discharge hole together with the refrigerant flows upward in the form of a mist, but when passing through the communication hole of the shaft, The oil is separated by the centrifugal force generated as it rotates, flies outward, flows downward along the wall of the sealed casing, and only the refrigerant passes through the shaft communication hole and is discharged from the discharge pipe into the refrigeration cycle, preventing oil spills. It is possible to prevent seizure of sliding parts and decrease in performance.

実施例 以下本発明の一実施例のロータリー型圧縮機について、
図面を参照しながら説明するが、従来と同一構成につい
ては同一番号を付してその詳細な説明を省略する。Example Below, regarding a rotary compressor according to an example of the present invention,
The description will be made with reference to the drawings, but the same components as those of the prior art will be given the same reference numerals and detailed description thereof will be omitted.

第１図、第２図は本発明の実施例におけるロタリー型圧
縮機の断面図である。1 and 2 are cross-sectional views of a rotary compressor in an embodiment of the present invention.

第１図において、２１はシャフト上端部軸受でシャフト
を支持する部分以外にシャフト上端部軸受の上方と下方
を連通ずる穴はない。また２２はシャフト連通穴であり
、シャフト上端部軸受２１の上方と下方を連通している
。In FIG. 1, reference numeral 21 denotes a shaft upper end bearing, and there is no hole that communicates between the upper and lower parts of the shaft upper end bearing other than the part that supports the shaft. Further, 22 is a shaft communication hole, which communicates the upper and lower parts of the shaft upper end bearing 21.

本実施例によれば、上軸受４を潤滑し終えた油や、吐出
孔１４から冷媒とともに吐出された油はミスト状になっ
て上方に流れるが、シャフト連通穴２２のみを通って上
方に流れるため、シャフト連通穴２２を通過する時にシ
ャフト８の遠心力で油が分離して外側に飛び密閉ケーシ
ング１の壁面を伝って下方に流れ、冷媒のみがシャフト
連通穴２２を経て吐出管１７から冷凍サイクルに吐出さ
れるため、油流出を低減でき、摺動部の焼きつき。According to this embodiment, the oil that has finished lubricating the upper bearing 4 and the oil discharged from the discharge hole 14 together with the refrigerant flow upward in the form of a mist, but flow upward only through the shaft communication hole 22. Therefore, when passing through the shaft communication hole 22, the oil is separated by the centrifugal force of the shaft 8, flies to the outside, flows downward along the wall surface of the sealed casing 1, and only the refrigerant passes through the shaft communication hole 22 and is frozen from the discharge pipe 17. Since it is discharged into the cycle, oil spillage can be reduced and seizures of sliding parts can be reduced.

能力の低下を防止することができる。It is possible to prevent a decline in performance.

発明の効果 以上のように本発明は、密閉ケーシング内に機械部と前
記機械部の上部にモータを備えるとともに、前記機械部
と前記モータをシャフトで連結し、前記シャフトの上端
部を支持するシャフト上端部軸受を備え、前記シャフト
にのみシャフト上端部軸受の上方と下方を連通ずるシャ
フト連通穴を設けることにより、上軸受を潤滑し終えた
油や、吐出孔から冷媒とともに吐出された油は、シャフ
ト連通穴を通過する時にシャフトの遠心力で油が冷媒と
分離して外側に飛び密閉ケーシングの壁面を伝って下方
に流れ、冷媒のみがシャフト連通穴を経て吐出管から冷
凍サイクルに吐出されるため、油流出を低減でき、摺動
部の焼きつき、能力の低下を防止することができる。Effects of the Invention As described above, the present invention includes a mechanical part in a sealed casing and a motor above the mechanical part, and a shaft that connects the mechanical part and the motor and supports the upper end of the shaft. By providing an upper end bearing and providing a shaft communication hole only in the shaft that communicates the upper and lower parts of the shaft upper end bearing, the oil that has finished lubricating the upper bearing and the oil discharged from the discharge hole together with the refrigerant can be When passing through the shaft communication hole, the oil separates from the refrigerant due to the centrifugal force of the shaft, flies outward, flows downward along the wall of the sealed casing, and only the refrigerant is discharged from the discharge pipe through the shaft communication hole into the refrigeration cycle. Therefore, oil spillage can be reduced, and seizure of sliding parts and reduction in performance can be prevented.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例におけるロータリー型圧縮機
の断面図、第２図は第１図のＩ−Ｉにおける断面図、第
３図は従来の圧縮機の断面図である。 １・・・・・・密閉ケーシング、２・・・・・・モータ
、８・・川・シャフト、１８・・・・・・機械部、２１
・・・・・・シャフト上端部軸受、２２・・・・・・シ
ャフト連通穴。 δ シでフｈ 第 図FIG. 1 is a sectional view of a rotary compressor according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line II in FIG. 1, and FIG. 3 is a sectional view of a conventional compressor. 1... Sealed casing, 2... Motor, 8... River/shaft, 18... Mechanical part, 21
...Shaft upper end bearing, 22...Shaft communication hole. δ

Claims (1)

【特許請求の範囲】[Claims] 密閉ケーシング内に機械部と、前記機械部の上部にモー
タとを備えるとともに、前記機械部と前記モータとをシ
ャフトで連結し、前記シャフトの上端部を支持するシャ
フト上端部軸受を設け、前記シャフトに前記シャフト上
端部軸受の上方と下方を連通するシャフト連通穴を設け
るとともに、大部分の吐出ガスをこのシャフト連通孔を
通して、密閉ケーシング外に吐出する圧縮機。A mechanical part is provided in a sealed casing, and a motor is provided above the mechanical part. The mechanical part and the motor are connected by a shaft, and a shaft upper end bearing is provided to support the upper end part of the shaft. The compressor is provided with a shaft communication hole that communicates between the upper and lower parts of the shaft upper end bearing, and discharges most of the discharged gas to the outside of the sealed casing through the shaft communication hole.