HERMETIC TYPE COMPRESSOR

• Main Author: HIRAKO TAKAYUKI
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2016
• Subjects: BLASTING; HEATING; LIGHTING; MECHANICAL ENGINEERING; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS; WEAPONS

PROBLEM TO BE SOLVED: To provide a novel hermetic type compressor capable of suppressing an increase of a bearing pressure between the outer periphery of a crank shaft and the end face of a bearing hole even when the crank shaft is inclined with the operation of a compressive load.SOLUTION: At least, a first inclined face 1gu-1 expanding outside at a first predetermined angle is formed near the end face of a bearing hole 1d journaling a crank shaft 7 on the side where a crank pin is located in a range from the inner circumference corner side of the bearing hole to the end face side, and a second inclined face 1gu-2 expanding outside at a second predetermined angle larger than the first predetermined angle is also formed which is connected to the first inclined face 1gu-1. Thus, even when the crank shaft 7 is inclined at a different angle, the first inclined face 1gu-1 or the second inclined face 1gu-2 formed on the inner circumference of the bearing hole of a bearing part has face contact with the outer peripheral face of the crank shaft 7 to suppress an increase of mutual bearing pressure.SELECTED DRAWING: Figure 5 【課題】圧縮荷重が作用してクランクシャフトが傾いても、クランクシャフトの外周と軸受孔の端面の間の面圧が高くなるのを抑制することができる新規な密閉型圧縮機を提供することにある。【解決手段】少なくとも、クランクピンが位置する側のクランクシャフト７を軸支する軸受孔１ｄの端面付近の軸受孔の内周囲奥側から端面側に向けて、第１の所定角度で外側に拡大する第１の傾斜面１ｇｕ−１を形成し、更にこの第１の傾斜面１ｇｕ−１に接続され、第１の所定角度より大きい第２の所定角度で外側に拡大する第２の傾斜面１ｇｕ−２を形成する構成とした。これによれば、クランクシャフト７が異なった角度で傾いても、軸受部の軸受孔の内周囲に形成した第１の傾斜面１ｇｕ−１或いは第２の傾斜面１ｇｕ−２とクランクシャフト７の外周面が面接触することで、相互の面圧の増加を抑制することができる。【選択図】図５