JP2015094224A5

JP2015094224A5 -

Info

Publication number: JP2015094224A5
Application number: JP2013232115A
Authority: JP
Filing date: 2013-11-08
Publication date: 2016-04-07
Anticipated expiration: 2033-11-08

Description

上記技術的課題を解決するため、本発明は、潤滑油を貯留する密閉容器内の主軸受によって回転支持され、外周に回転子を取り付けたクランクシャフトと、密閉容器内とクランクシャフトの円筒中空部とが連通するように当該クランクシャフトに設けられたガス通し孔と、主軸受の内径部と円筒中空部とが連通するためにクランクシャフトに設けられた連通孔と、クランクシャフトの円筒中空部の下部に圧入された中空のスリーブと、スリーブ内にクリアランスを有して取り付けられると共に、表面が螺旋状の凹凸形状の固定ピースと、を備え、クランクシャフトの回転に伴うスリーブと固定ピースとによる粘性ポンプ作用によって潤滑油を汲み上げて円筒中空部内の油分離空間となる気液分離室で液体とミスト状態を含む気体とに分離し、当該液体を連通孔を通して摺動部に供給すると共に、当該気体をガス通し孔を通して圧縮要素へ供給する密閉形圧縮機において、スリーブの上縁部と連通孔の下端部との間に固定ピースの上端部が位置され、気液分離室は、円筒中空部の内周面の径と固定ピースのボス部の外表面の径との間の寸法をスリーブの内周面の径と固定ピースのボス部の外表面の径との間の寸法よりも大きくすることで形成される減圧用の干渉部を持つ構造であることを特徴とする。 In order to solve the above technical problem, the present invention provides a crankshaft that is rotatably supported by a main bearing in a sealed container for storing lubricating oil and has a rotor attached to the outer periphery, and a cylindrical hollow portion in the sealed container and the crankshaft. A gas passage hole provided in the crankshaft so as to communicate with each other, a communication hole provided in the crankshaft for communication between the inner diameter portion of the main bearing and the cylindrical hollow portion, and a cylindrical hollow portion of the crankshaft. A hollow sleeve press-fitted in the lower portion, a fixed piece having a concave and convex shape with a spiral surface mounted in the sleeve with a clearance, and a viscosity caused by the sleeve and the fixed piece accompanying the rotation of the crankshaft pumping up the lubricating oil is separated into a gas containing liquid and mist state by the gas-liquid separation chamber comprising an oil separation space within the cylindrical hollow portion by the pumping action, In a hermetic compressor for supplying the liquid to the sliding portion through the communication hole and supplying the gas to the compression element through the gas communication hole, a fixed piece is provided between the upper edge of the sleeve and the lower end of the communication hole. The upper end is located, and the gas-liquid separation chamber has a dimension between the diameter of the inner peripheral surface of the cylindrical hollow portion and the diameter of the outer surface of the boss portion of the fixed piece, and the diameter of the inner peripheral surface of the sleeve and the boss of the fixed piece. It is characterized by having a structure having an interference part for decompression formed by making it larger than the dimension between the diameter of the outer surface of the part.

次に、図２を参照すれば、密閉容器１内とクランクシャフト１２の円筒中空部とが連通するようにクランクシャフト１２にはガス通し孔２９が設けられると共に、主軸受８の内径部と円筒中空部とが連通するように連通孔１７が設けられ、クランクシャフト１２の円筒中空部の下部には中空のスリーブ１９が圧入され、スリーブ１９内にはクリアランスを有して螺旋状に形成されたボス部２３とその周囲のスパイラル溝２５（第１の給油溝２６と呼ばれても良い）とにより表面が螺旋状の凹凸形状の固定ピース２１が取り付けられている。ここでは、クランクシャフト１２の回転に伴うスリーブ１９と固定ピース２１とによる第１の粘性ポンプ１６ａの粘性ポンプ作用によって潤滑油２を汲み上げてクランクシャフト１２の円筒中空部内の油分離空間となる気液分離室１８で液体とミスト状態を含む気体（冷媒３のガス）とに分離し、液体を連通孔１７を通して摺動部に供給すると共に、気体をガス通し孔２９を通して圧縮要素４へ供給する。 Referring now to FIG. 2, with a cylindrical hollow portion of the closed container 1 in the crankshaft 12 is gas passing hole 29 is provided in the crankshaft 12 so as to communicate with, the inner diameter portion and a cylindrical main bearing 8 A communication hole 17 is provided so as to communicate with the hollow portion, a hollow sleeve 19 is press-fitted into the lower portion of the hollow cylindrical portion of the crankshaft 12, and a spiral is formed in the sleeve 19 with a clearance. A fixed piece 21 having an uneven surface with a spiral surface is attached by a boss portion 23 and a spiral groove 25 (may be referred to as a first oil supply groove 26) around the boss portion 23. Here, the gas-liquid which pumps up the lubricating oil 2 by the viscous pump action of the first viscous pump 16a by the sleeve 19 and the fixed piece 21 accompanying the rotation of the crankshaft 12 and becomes an oil separation space in the cylindrical hollow portion of the crankshaft 12. In the separation chamber 18, the liquid and the gas including the mist state (gas of the refrigerant 3) are separated, the liquid is supplied to the sliding portion through the communication hole 17, and the gas is supplied to the compression element 4 through the gas passage hole 29.

気液分離室１８は、圧縮機回転数が通常時よりも多い場合の第１の粘性ポンプ１６ａの粘性ポンプ作用による潤滑油２の汲み上げに伴って室内に溜められる潤滑油２から分離された液体がガス通し孔２９側に溢れ出ないように容量が増大されると共に、室内に設けた堰３３（具体的には下方の大堰３３ａ、上方の小堰３３ｂ）により液体がガス通し孔２９側へ流れるのを堰き止めて抑制する構造となっている。ガス通し孔２９は、気液分離室１８の上部に形成された堰３３を経由して分離されて流れた気体を密閉容器１内の圧縮要素４側に供給するものである。連通孔１７は、クランクシャフト１２の円筒中空部内の気液分離室１８の下部に設けられてクランクシャフト１２の外周側に設けられた第２の給油溝３０による第２の粘性ポンプ１６ｂに液体を供給するものである。給油孔２８は、第２の粘性ポンプ１６ｂで汲み上げられた液体が流れ込む通路であり、給油孔２８を通った液体は偏芯部１０の孔から圧縮要素４の上部に吹き出される。因みに、固定ピース２１に設けたスパイラル溝２５の途中位置に設けられたゴミ捕集用溝２７は、スパイラル溝２５を通して給油される潤滑油２中のゴミを捕集するためのものである。気液分離室１８におけるスリーブ１９の上縁部と連通孔１７の下端部との間に形成される干渉部１８ａは、第１の粘性ポンプ１６ａと気液分離室１８との間で圧力を下げる減圧用の役割を持つ。 The gas-liquid separation chamber 18 is a liquid separated from the lubricating oil 2 stored in the chamber as the lubricating oil 2 is pumped up by the viscous pump action of the first viscous pump 16a when the compressor speed is higher than normal. The capacity is increased so that the liquid does not overflow to the gas passage hole 29 side, and the liquid is moved to the gas passage hole 29 side by the weir 33 (specifically, the lower large weir 33a and the upper small weir 33b) provided in the room. It has a structure that blocks and suppresses the flow. The gas passage hole 29 supplies the gas separated and flowed through the weir 33 formed in the upper part of the gas-liquid separation chamber 18 to the compression element 4 side in the sealed container 1. The communication hole 17 is provided in the lower part of the gas-liquid separation chamber 18 in the hollow cylindrical portion of the crankshaft 12 and supplies liquid to the second viscous pump 16b by the second oil supply groove 30 provided on the outer peripheral side of the crankshaft 12. To supply. The oil supply hole 28 is a passage through which the liquid pumped up by the second viscous pump 16 b flows, and the liquid passing through the oil supply hole 28 is blown out from the hole of the eccentric portion 10 to the upper portion of the compression element 4. Incidentally, the dust collecting groove 27 provided in the middle of the spiral groove 25 provided in the fixed piece 21 is for collecting the dust in the lubricating oil 2 supplied through the spiral groove 25. An interference portion 18 a formed between the upper edge portion of the sleeve 19 and the lower end portion of the communication hole 17 in the gas-liquid separation chamber 18 lowers the pressure between the first viscous pump 16 a and the gas-liquid separation chamber 18. Has a role for decompression.

この固定ピース２１の取り付け位置は、クランクシャフト１２の円筒中空部によって形成された気液分離室１８と主軸受８とを連通するためにクランクシャフト１２の側壁に設けられた連通孔１７と重ならない位置となっている。仮に重なる位置とすれば、連通孔１７は固定ピース２１のスパイラル溝２５を形成するためのボス部２３で閉塞されること、即ちクランクシャフト１２が回転する都度、連通孔１７が固定ピース２１のボス部２３によって閉塞されることになる。 The mounting position of the fixed piece 21 does not overlap with the communication hole 17 provided in the side wall of the crankshaft 12 to communicate the gas-liquid separation chamber 18 formed by the cylindrical hollow portion of the crankshaft 12 and the main bearing 8. Is in position. If the position overlaps, the communication hole 17 is closed by the boss portion 23 for forming the spiral groove 25 of the fixed piece 21. That is, each time the crankshaft 12 rotates, the communication hole 17 becomes the boss of the fixed piece 21. It will be obstruct | occluded by the part 23.

第１の粘性ポンプ１６ａの構成について、クランクシャフト１２の円筒中空部には気液分離室１８が形成されており、この気液分離室１８の下方にはスリーブ１９がクランクシャフト１２への圧入により取り付けられているが、その圧入代は通常５ｍｍ程度である。ここで、スパイラル溝２５中を上昇する潤滑油２は、回転の途中でゴミ捕集用溝２７に出会うことになるが、通常潤滑油２中に入ったゴミの重量は潤滑油２と比較べて重いため、ゴミには遠心力が強く働いてスリーブ１９に内接しながら上昇し、上昇の途中でゴミ捕集用溝２７に入って留め置かれる仕組みとなっている。このようにして、潤滑油２は浄化されることになる。 Regarding the configuration of the first viscous pump 16 a, a gas-liquid separation chamber 18 is formed in the cylindrical hollow portion of the crankshaft 12, and a sleeve 19 is press-fitted into the crankshaft 12 below the gas-liquid separation chamber 18. Although it is attached, the press-fitting allowance is usually about 5 mm. Here, the lubricating oil 2 rising in the spiral groove 25 encounters the dust collecting groove 27 in the middle of the rotation, but the weight of the dust contained in the lubricating oil 2 is usually compared with that of the lubricating oil 2. Therefore, the centrifugal force acts strongly on the dust and rises while being inscribed in the sleeve 19, and enters the dust collection groove 27 and stays in the middle of the rise. In this way, the lubricating oil 2 is purified.

何れにせよ、実施例１に係る密閉形圧縮機によれば、クランクシャフト１２の回転に伴うスリーブ１９と固定ピース２１とによる第１の粘性ポンプ１６ａの粘性ポンプ作用によって潤滑油２を汲み上げてシャフト１２の円筒中空部内の気液分離室１８で液体とミスト状態を含む気体（冷媒３のガス）とに分離して液体を連通孔１７を通して摺動部に供給すると共に、気体をガス通し孔２９を通して圧縮要素４の上部に供給する際、気液分離室１８において、スリーブ１９の上端部と連通孔１７の下端部との間に形成される干渉部１８ａが潤滑油２を減圧してから室内での気液分離に供すると共に、汲み上げに伴って室内に溜められる潤滑油２の液体がガス通し孔２９側に溢れ出ないように容積が増大された構造としている他、室内の上部に設けた堰３３（大堰３３ａ、小堰３３ｂ）により潤滑油２の液体がガス通し孔２９側へ流れるのを堰き止めて抑制する構造を持つ。 In any case, according to the hermetic compressor according to the first embodiment, the lubricating oil 2 is pumped up by the viscous pump action of the first viscous pump 16a by the sleeve 19 and the fixed piece 21 as the crankshaft 12 rotates. In the gas-liquid separation chamber 18 in the cylindrical hollow portion 12, the liquid and the gas including the mist state (gas of the refrigerant 3) are separated and supplied to the sliding portion through the communication hole 17, and the gas is supplied to the gas passage hole 29. In the gas-liquid separation chamber 18, when the interference portion 18 a formed between the upper end portion of the sleeve 19 and the lower end portion of the communication hole 17 decompresses the lubricating oil 2, In addition to being used for gas-liquid separation, the volume of the lubricating oil 2 stored in the chamber as it is pumped is increased so that it does not overflow to the gas passage hole 29 side. Weir 33 (Osegi 33a, small weir 33b) was with liquid lubricant 2 suppressing structure dammed to flow into the gas passage holes 29 side by the.

Claims

A crankshaft rotatably supported by a main bearing in a sealed container for storing lubricating oil and provided with a rotor on the outer periphery, and provided in the crankshaft so that the inside of the sealed container and the cylindrical hollow portion of the crankshaft communicate with each other. A gas passage hole, a communication hole provided in the crankshaft for communication between the inner diameter portion of the main bearing and the cylindrical hollow portion, and a hollow press-fitted into a lower portion of the cylindrical hollow portion of the crankshaft. And a fixed piece having a concave and convex shape with a spiral surface, and a viscous pump action by the sleeve and the fixed piece accompanying the rotation of the crankshaft. gas containing liquid and mist state by the gas-liquid separation chamber comprising an oil separation space within the cylindrical hollow portion pumping up the lubricating oil by Separated into supplies the liquid to the sliding portion via the communication hole, the closed-type compressor for supplying the gas to the compression element through the gas through-holes,
An upper end portion of the fixed piece is positioned between an upper edge portion of the sleeve and a lower end portion of the communication hole, and the gas-liquid separation chamber includes a diameter of an inner peripheral surface of the cylindrical hollow portion and a boss of the fixed piece. Interference for pressure reduction formed by making the dimension between the outer surface diameter of the part larger than the dimension between the inner peripheral surface diameter of the sleeve and the outer surface diameter of the boss part of the fixed piece A hermetic compressor characterized by a structure having a part.

2. The hermetic compressor according to claim 1, wherein a distal end portion of the fixed piece protrudes within a range of 0.3 to 1.6 mm from a distal end of the sleeve.

2. The hermetic compressor according to claim 1, further comprising a support member that restrains the movement of the fixed piece in a rotation direction and a vertical direction, and the support member is a part of an insulator that constitutes an electric element that rotates the crankshaft. A hermetic compressor that is locked to

4. The hermetic compressor according to claim 3, wherein the support member is attached at a position that avoids an electrical connector and a crossover support provided on the insulator.

A refrigerator comprising a refrigeration system equipped with the hermetic compressor according to any one of claims 1 to 4.

A crankshaft rotatably supported by a main bearing in an airtight container for storing lubricating oil, and a gas passage hole provided in the crankshaft so that the inside of the airtight container and the cylindrical hollow portion of the crankshaft communicate with each other; A communication hole provided in the crankshaft for communication between the inner diameter portion of the main bearing and the cylindrical hollow portion; a hollow sleeve provided in a lower portion of the cylindrical hollow portion of the crankshaft; In a hermetic compressor provided with a fixed piece having a concave and convex shape with a spiral surface,
A hermetic compression, wherein an upper end portion of the fixed piece is positioned between an upper edge portion of the sleeve and a lower end portion of the communication hole, and an inner diameter of the cylindrical hollow portion is larger than an inner diameter of the sleeve. Machine.