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61. 发明专利

JP2000337257A FLUID MACHINERY 失效
公开(公告)号：JP2000337257A
公开(公告)日：2000-12-05
申请号：JP14406999
申请日：1999-05-24
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAGATO YUKIO , MATSUDA SUSUMU , KIMATA HISAYUKI , HIROOKA KATSUMI , BITO HIROAKI
IPC分类号： F04B39/02 , F04C29/00 , F04C29/02
摘要： PROBLEM TO BE SOLVED: To prevent discharge of a lubricating oil to the outside, lower an oil circulating rate and prevent seizure of a bearing. SOLUTION: A fluid machine is furnished with an electric motor, a rotary shaft 105 to which torque is transmitted from the electric motor and a bearing (main bearing) 171 to support the rotary shaft 105 free to rotate and is provided with a ring cylindrical cover (splashed lubricating oil outflow preventive means) 20 positioned between the electric motor and the bearing 171 and to cover a circumference of the rotary shaft 105.

62. 发明专利

JPH11236887A SCROLL TYPE FLUID MACHINERY AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH11236887A
公开(公告)日：1999-08-31
申请号：JP4070598
申请日：1998-02-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOBAYASHI HIROYUKI , MATSUDA SUSUMU
IPC分类号： F04C29/00 , F01C17/06 , F04C18/02 , F04C28/22
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a gap and interference between the vortex bodies of two scrolls during operation and to maintain high compression performance even when a revolving scroll and a fixed scroll are manufactured of materials different in the coefficient of thermal expansion. SOLUTION: In a scroll type fluid machinery provided with one fixed scroll 9 and the other revolving scroll 11 having vortex bodies 9b and 11b erected at the respective end plates, one scroll 9 is manufactured from a material having the coefficient (γf ) of thermal expansion and the other scroll 11 is manufactured from a material having the coefficient (γm ) higher than the coefficient (γf ). Provided the radius of a basic circle is (b), the typical size in a radial direction of an end plate is R, a typical temperature at the typical size R during operation is (t), and a difference between (γm ) and (γf ) is A, a phase deviating means is provided to engage the two vortex bodies with each other in a position further deviated to a position by a phase delay angle α (rad) calculated by α=R.t.Δ/b from a state deviating a phase by 180 deg..

63. 发明专利

JPH1137078A HERMETIC SCROLL COMPRESSOR 失效
公开(公告)号：JPH1137078A
公开(公告)日：1999-02-09
申请号：JP19704297
申请日：1997-07-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： MATSUDA SUSUMU , KOBAYASHI HIROYUKI
IPC分类号： F04C29/02
摘要： PROBLEM TO BE SOLVED: To prevent seizure due to shortage of oil feed from generating and enable oil circulation rate to be made appropriate extending from high speed rotation to low speed rotation by providing a means regulating the sucking quantity of lubricating oil according to the rotating speed of a motor in a compressor on the suction port of an oil feed pump. SOLUTION: A piston 55 is brought down by elasticity of a spring 56 at low speed rotation, and lubricating oil is sucked into respective passages through suction holes 57a, 57b. However at high speed rotation, pressure difference is generated between the interior F of a closed housing and the interior E of a suction port 52, the piston 55 is pushed up by the pressure difference, i.e., the pressure loss in the suction port 52, and the suction hole 57b is closed with the side of the piston 55. When the suction hole 57b is closed, lubricating oil is sucked to the passage only through the suction hole 57, the oil feed quantity of an oil feed pump is reduced, and hence excessive oil feed to respective bearings is eliminated. Hereby, oil is prevented from being excessively fed, and lubricating oil drained outward can be reduced.

64. 发明专利

JPH109175A LUBRICATION PUMP DEVICE FOR COMPRESSOR 失效
公开(公告)号：JPH109175A
公开(公告)日：1998-01-13
申请号：JP16445096
申请日：1996-06-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOBAYASHI HIROYUKI , MATSUDA SUSUMU , HIROOKA KATSUMI
IPC分类号： F04C29/12 , F04C29/00 , F04C29/02
摘要： PROBLEM TO BE SOLVED: To prevent the seizure or abnormal wear of sliding portions in a lubrication pump for a compressor by providing a gas vent passage connecting the space defined by a rotary shaft, a rotor and a bearing part for the rotary shaft and the interior space of a closed housing to prevent babbles in lubricating oil due to the entrainment of refrigerant gas thereinto. SOLUTION: A gas vent groove 31 formed on the outer periphery of a rotary shaft 7 extends from a space 30 enclosed by the rotary shaft 7, a rotor 9 and a bearing 20 to an interior space 1a of a closed housing 1. Lubricating oil which has lubricated the bearing 20 is melted with refrigerant therein being bubbling under heat due to the sliding of the bearing, and flows from the bearing 20 into the space 30 while including the refrigerant. The refrigerant-including lubricating oil then flows out of the space 30 into the interior space 1a of the closed housing 1 through the gas vent groove 31.

65. 发明专利

JPH09100785A SCROLL TYPE COMPRESSOR 失效
公开(公告)号：JPH09100785A
公开(公告)日：1997-04-15
申请号：JP25759595
申请日：1995-10-04
申请人： MITSUBISHI HEAVY IND LTD
发明人： SATO KAZUHIRO , ITO TAKAHIDE , MATSUDA SUSUMU , TANI KAZUYA , UKAI TETSUZO
IPC分类号： F04C28/06 , F04C18/02 , F04C28/26 , F04C29/10
摘要： PROBLEM TO BE SOLVED: To prevent reverse rotation of a revolving scroll at the time of stopping supply of electric power by providing a mechanism to introduce gas on the side of high pressure to a space on the back of a fixed scroll at the time of stopping an electric power source and pressing the fixed scroll on the revolving scroll and the revolving scroll on a thrust bearing by pressure of gas. SOLUTION: A scroll type compressor is engaged with a spiral type lap erected on an inner surface of each end plate of a fixed scroll 1 and a revolving scroll 2, and the revolving scroll 2 is driven by an electric motor consisting of a stator 6 and a rotor 5. In this case, the high pressure gas of a discharge chamber 21 is made to flow in an intermediate chamber 22 and is pressed on the revolving scroll 2 from the back of the fixed scroll 1 by providing a solenoid valve 31 on a discharge cover 4 and opening the solenoid valve 31 which is closed at the time of applying an electric power source at the time of stopping electrifying. Thereby, reverse rotation is prevented by stopping the revolving scroll 2 by frictional force at the time of pressing the same revolving scroll 2 on a thrust bearing 8a through a tip 1a.

66. 发明专利

JPH08270578A SCROLL TYPE FLUID MACHINE 失效
公开(公告)号：JPH08270578A
公开(公告)日：1996-10-15
申请号：JP7412595
申请日：1995-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HIROOKA KATSUMI , KOBAYASHI HIROYUKI , MATSUDA SUSUMU
IPC分类号： F04C18/02 , F04C27/00
摘要： PURPOSE: To lower the abrasion by varying the carbon fiber mixing rate with each tip seal by forming a tip seal provided at the end face of a spiral tap of each scroll member out of composite material where carbon fibers are mixed in polyphenylene sulfide. CONSTITUTION: A rotary scroll 14 and a fixed scroll 10 are engaged with each other, with the angle between them slid by 180 deg., and one is made of aluminum material, and the other is made of one where surface processing is applied to aluminum material, or one of iron metal, or one where surface treatment is applied to iron metal. Tip seals 17 and 18 are projected from the tip of each spiral laps 12 and 16. In this case, the tip seal is made of composite plastic material being made by mixing carbon fibers, etc., to the base material of polyphenylene sulfide. The mixing rate of carbon fibers of tip seal material on the side of the scroll material made of aluminum is made higher than that on the side of other scroll member.

67. 发明专利

JPH0821391A TRANSVERSE INSTALLAIION TYPE SEALED COMPRESSOR 失效
公开(公告)号：JPH0821391A
公开(公告)日：1996-01-23
申请号：JP15714094
申请日：1994-07-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOBAYASHI HIROYUKI , MATSUDA SUSUMU , SHIKAUCHI TOSHIYUKI , HIROOKA KATSUMI
IPC分类号： F04C29/02 , F04C18/02 , F04C28/28 , F04C29/12 , F04C29/10
摘要： PURPOSE:To eliminate a possibility of accidents such as generation of liquid compression at the time of start which may cause destruction of a spiral wrap and the like, by connecting together the housing bottom part and the accumulator bottom part of a transverse installation type sealed compressor via a liquid returning pipe having a throttle. CONSTITUTION:The bottom part of a housing 8 and the bottom part of an accumulator 101 between a compressing mechanism C and a motor M are connected to each other by means of a liquid returning pipe 200 having a throttle 201. The opening end on the housing side of the liquid returning pipe 200 is protruded into the housing 8. While the compressor C is stopped, cooling medium is dissolved into lubricating oil in the compressor and thus the cooling medium in a system stagnates on the low pressure side 45 of the compressor C, but the portion of the liquid cooling medium staying higher than the opening end in the housing of the liquid returning pipe 200 returns to the accumulator 101 via the liquid returning pipe 200. Thus, stagnation of the liquid cooling medium in a sealed space 24 and compression thereof may be prevented, and also the lubricating oil is securely kept in the housing 8, sucked by means of a pump 51 when an operation is resumed and supplied for lubrication.

68. 发明专利

JP2006342775A SCROLL COMPRESSOR 审中-公开
公开(公告)号：JP2006342775A
公开(公告)日：2006-12-21
申请号：JP2005171233
申请日：2005-06-10
申请人： MITSUBISHI HEAVY IND LTD
发明人： SATO SO , MATSUDA SUSUMU , MIZUNO HISAO , TAKASU HIROSATO , TATEISHI TAICHI
IPC分类号： F04C18/02
摘要： PROBLEM TO BE SOLVED: To provide a scroll compressor for improving compression efficiency by optimizing step difference mesh clearance in an operation state. SOLUTION: This stepped-shaped scroll compressor has a step part mesh clearance preset value Hf generated between a connecting wall surface 12h of a fixed scroll 12 and a step part side surface with the connecting edge 13e of a turning scroll 13 and a step part mesh clearance preset value Ho generated between a connecting wall surface 13h of the turning scroll 13 and a step part side surface with the connecting edge 12e of the fixed scroll 12. The step part mesh clearance preset value (Hf in an illustrated example) of mutually approaching when the turning scroll 13 inclines by receiving gas pressure in operation, is set larger than the mutually approaching other (Ho in the illustrated example). COPYRIGHT: (C)2007,JPO&INPIT

69. 发明专利

JP2592155B2 失效
公开(公告)号：JP2592155B2
公开(公告)日：1997-03-19
申请号：JP2884690
申请日：1990-02-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： OGATA MASATOSHI , JUZAKI TSUNEO , HIRANO TAKAHISA , OOYA NORIMASA , MATSUDA SUSUMU , ITO TAKAHIDE
IPC分类号： F01C1/02 , F04C18/02

70. 发明专利

JPH07324695A HORIZONTAL CLOSED COMPRESSOR 失效
公开(公告)号：JPH07324695A
公开(公告)日：1995-12-12
申请号：JP28712194
申请日：1994-10-28
申请人： MITSUBISHI HEAVY IND LTD
发明人： MATSUDA SUSUMU , HIROOKA KATSUMI , KOBAYASHI HIROYUKI
IPC分类号： F04C18/02 , F04C28/06 , F04C29/02
摘要： PURPOSE:To prevent poor lubrication of a required lubricating part in starting so as to prevent seizure in advance by providing a check valve mechanism for closing a passage of a connecting pipe by pressure drop in a closed housing in starting. CONSTITUTION:A check valve mechanism 100 is provided in a connecting pipe 92 for returning lubricating oil in a closed housing 8 into an oil tank 9. The check valve mechanism 100 is composed of a check ball 101, a valve seat 102 and a retainer 103, and a through port 104 is provided on the valve seat 102, and many holes 105 are bored on the retainer 103. When a compressor is stopped for long periods, pressure in the closed housing 8 and pressure in the oil tank 9 are made equal to each other. When the check valve mechanism 100 is closed by pressure drop in the closed housing 8 in starting of the compressor, oil in the oil tank 9 is forcibly fed into an oil pump through a suction pipe by differential pressure to be generated between the pressure in the oil tank 9 and the pressure in the closed housing 8. Thereby, poor lubrication of a required lubricating part and seizure in starting are prevented.

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