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71. 发明专利

JPS5882088A VANE TYPE COMPRESSOR 失效
公开(公告)号：JPS5882088A
公开(公告)日：1983-05-17
申请号：JP15881981
申请日：1981-10-07
申请人： HITACHI LTD
发明人： TAKAO KUNIHIKO , KAWASHIMA KENICHI , NAKAMURA YOUZOU , KISHI ATSUO
IPC分类号： F04C18/344 , F04C29/12
摘要： PURPOSE:To make it possible to reduce the pressure loss in the intake passage system and to improve the volumetric efficiency of the titled compressor by a method wherein the angle of an intake port with respect to the center of a rotor at the terminating point of intake is advanced in the rotational direction of the rotor from a geometrical terminating point of intake so that the sectional area of the intake port is enlarged. CONSTITUTION:The angle O2 of the intake port 18 with respect to the center of the rotor 6 at the terminating point of intake is advanced in the rotational direction of the rotor from the geometrical angle theta1. Accordingly, it is possible to enlarge the sectional area of the intake port 18 and also to enlarge the surface area of the throat of the intake port 18 (the axial surface area defined by a cam ring 4 and the rotor 6 lying at the intake terminating point angle). Thus, since it is possible to enlarge the sectional area of the intake port and the surface area of the throat of the port, the pressure loss in the intake passage system can be reduced to thereby improve the volumetric efficiency of the compressor.

72. 发明专利

JPS5813185A ROTARY VANE TYPE COMPRESSOR 失效
公开(公告)号：JPS5813185A
公开(公告)日：1983-01-25
申请号：JP10936381
申请日：1981-07-15
申请人： HITACHI LTD
发明人： KISHI ATSUO
IPC分类号： F01C21/08 , F04C29/02
摘要： PURPOSE:To supply oil of constantly stable back pressure to the backside of vanes without any deterioration of the capacity of a captioned compressor by providing a throttle constructed of sintered alloy or metal filter in an oil passage to conduct the oil under a discharge pressure tothe backside of vanes. CONSTITUTION:A filter 32 constructed of sintered alloy or metal filter is inserted into an oil-feed hole 31 connected to the back space of vanes 15 in an R plate 4. The oil under a discharge pressure is reduced in its pressure by the resistance of the flow passage of this filter 32, and the oil of a proper pressure is supplied to the backside of vanes 15. This construction permits to supply the oil of constantly stable back pressure to the backside of vanes. That is, since the surface area of the filter 32 is much greater than a single throttling hole or the like, this part is free from choking. Meanwhile, since dust or the like can be filtered by the filter 32, vanes 15 and others can be prevented from damages for obtaining a long life of a compressor.

73. 发明专利

JPS57163179A APPARATUS FOR DRIVING COMPRESSOR USED IN AUTOMOTIVE AIR CONDITIONER 失效
公开(公告)号：JPS57163179A
公开(公告)日：1982-10-07
申请号：JP4654281
申请日：1981-03-31
申请人： NISSAN SHATAI CO , HITACHI LTD
发明人： UCHIDA TOKIAKI , KISHI ATSUO , SUGINUMA ATSUSHI
IPC分类号： F04B35/00
摘要： PURPOSE:To enable to couple and uncouple an input shaft of a compressor and an output shaft of an engine freely in a desired manner, by supporting coils of an electromagnetic clutch in a fixed manner in an apparatus for changing the speed of rotation of the compressor in two stages according to the engine speed. CONSTITUTION:A belt 8a is rotated always when an output shaft 2 of an engine is turned. However, when current supply to coils 4a, 4b is interrupted, an input shaft of a compressor is not turned. By supplying current to the coil 4a during low speed operation of the engine, a disk plate 6a comes into close contact with a pulley 5a, so that the input shaft 1 is turned via an armature 9 at a speed equal to the speed of output shaft 2 multiplied by D2/D1. On the other hand, by supplying current to the coil 4b during high speed operation of the engine while interrupting current supply to the coils 4a, another disk plate 6b is brought into close contact with a pulley 5b, so that the input shaft 1 is turned by a belt 8b at a speed equal to the speed of output shaft 2 multiplied by D3/D1.

74. 发明专利

JPS57146095A OIL SEPARATING APPARATUS 失效
公开(公告)号：JPS57146095A
公开(公告)日：1982-09-09
申请号：JP3132681
申请日：1981-03-06
申请人： HITACHI LTD
发明人： KAWABATA TOSHIAKI , IBARAKI YOSHIAKI , KISHI ATSUO , SUGA TSUNEO
IPC分类号： B01D45/08 , F04C29/02
摘要： PURPOSE:To raise the oil separating efficiency, by providing a baffle plate for receiving gas from a discharge port of a compressor and scattering the same to the surroundings, and an oil separating member disposed around the baffle plate for capturing the scattered oil. CONSTITUTION:An oil separator is provided in a chamber at the portion thereof located between an outlet port and a discharge port 9. Oil separated by the oil separator is reserved at a lower portion in the chamber and then supplied from an oil suppory port 15 to bearings and back side of vanes. Here, gas discharged from the outlet port 8 of a compressor is carried into a suction passage 16 and brought into abutment with a baffle plate 17 which is shaped in a conical from. Therefore, oil particles contained in coolant gas is scattered to the circumferential directions of the baffle plate 17 and captured by an oil separating member 18 disposed in the manner of surrounding the baffle plate 17. The oil thus captured by the member 18 drops downward and is then discharged to the outside from the back of the baffle plate through a discharge passage 19.

75. 发明专利

JPS57146094A OIL SEPARATING APPARATUS 失效
公开(公告)号：JPS57146094A
公开(公告)日：1982-09-09
申请号：JP3132581
申请日：1981-03-06
申请人： HITACHI LTD
发明人： KAWABATA TOSHIAKI , IBARAKI YOSHIAKI , KISHI ATSUO , SUGA TSUNEO
IPC分类号： B01D45/08 , F01M13/04 , F04C29/02
摘要： PURPOSE:To raise the oil separating efficiency and to confine oil always in a chamber, by superposing a plurality of plates having many longitudinal grooves formed on both surfaces thereof with a proper spacing from each other, and flowing discharge gas from a compressor in a direction perpendicular to the grooves. CONSTITUTION:High-pressure gas discharged from an outlet port 10 is carried through a discharge gas passage 15 and enters into a space 17 in an oil separator by the function of its own pressure. Gases thus introduced into the space 17 from a plurality of such discharge gas passages 15 collide to each other, so that fine particles of oil contained in coolant gas are developed into droplets of oil. While the droplets of oil flow through the spaces formed between plates 19 formed with grooves in a direction perpendiculr to the length of the grooves, droplets of oil are captured by the grooves and made to flow downward under its own weight and pressure of gas in the grooves. In the vertical direction in the spaces between the grooved plates 19, on the other hand, gas flow is restricted by spacers 24, so that gas is made to flow dividedly in both of the right and left directions.

76. 发明专利

JPS57146089A VANE COMPRESSOR 失效
公开(公告)号：JPS57146089A
公开(公告)日：1982-09-09
申请号：JP3132781
申请日：1981-03-06
申请人： HITACHI LTD
发明人： KAWASHIMA KENICHI , TAKAO KUNIHIKO , NAKAMURA YOUZOU , KISHI ATSUO
IPC分类号： F04C18/344 , F01C21/08
摘要： PURPOSE:To prevent chattering of vanes of a vane compressor, by employing such an arrangement that the sum of the centrifugal force and the inertia force caused by acceleration of the vanes is not made negative. CONSTITUTION:A cooling medium drawn from a suction port 6 along with rotation of a rotor 4 is compressed gradually with decreasing of the volume of a compression chamber 10 defined by a vane 3, rotor 4 and the inner surface of a cam ring 1 and then discharged to the outside from a chamber 11 via a discharge port 7, discharge valve means 8 and discharge passage 9. Here, if the vane height and a distance rm between the center of gravity of the vane 3 and the center of the rotor 4 are selected such that the sum of the distance rm and the acceleration speed of the vane 3 in its slot is positive, the vane 3 is prevented from being detached from the inner surface of the cam ring 1. Therefore, it is enabled to prevent lowering in the performance of the compressor due to leakage of cooling medium or production of noises due to the chattering of the vanes.

77. 发明专利

JPS57137682A LUBRICATOR FOR COMPRESSOR IN ROTARY VANE TYPE REFRIGERATOR 失效
公开(公告)号：JPS57137682A
公开(公告)日：1982-08-25
申请号：JP2157181
申请日：1981-02-18
申请人： HITACHI LTD
发明人： YOSHIOKA MASAHIRO , KISHI ATSUO , HAZAKI EIICHI , IBARAKI YOSHIAKI
IPC分类号： F04C18/344 , F04C29/02
摘要： PURPOSE:To prevent the abrasion and the burning of the seal section, by providing an axial oil supply groove in the outer-circumferential face of a rotor shaft to be supported by a sliding bearing then performing the lubrication of said bearing and the control of the cooling and the vane back pressure reliably thereby reducing the gap of the bearing. CONSTITUTION:An oil supply groove 29 are made axially such that it will bevel the outer-circumferences of rotor shafts 4a, 4b. Consequently the lubrication to the sliding bearing is improved while the flow path resistance of the lubrication oil passing through the bearing gap can be varied thereby the vane back pressure functioning on the vane bottom chamber 9 can be controlled. Said oil sup- ply groove 29 can be formed easily in the outer circumferential faces of the rotor shafts 4a, 4b through the surface grinding where the depth (H) is finished accurately with micron order to enable the improvement of the control accuracy of the flow path resistance. Consequently the gap of the sliding bearing 5 can be reduced resulting in the prevention of the abrasion and the burning of the tangent seal section.

78. 发明专利

JPS57116191A OVERHEATING PREVENTING DEVICE FOR REFRIGERANT OF REFRIGERANT COMPRESSOR 失效
公开(公告)号：JPS57116191A
公开(公告)日：1982-07-20
申请号：JP123681
申请日：1981-01-09
申请人： HITACHI LTD
发明人： KAWASHIMA KENICHI , TAKAO KUNIHIKO , KISHI ATSUO
IPC分类号： F04C29/04 , F04C29/00
摘要： PURPOSE:To increase volumetric efficiency, by preventing overheating of refrigerant in a refrigerant passage by making the structure of a passage such that the refrigerant does not directly contact to the face of wall of a passage, in the system of refrigerant passage from a suction port of refrigerant up to a compression chamber in the captioned compressor. CONSTITUTION:The boss part 27 abutting on a rig 26 and forming an axle sealing chamber, and a baffle 28 in the manner of adhereing to the surface of an inside wall of the outermost circumference, are provided to the captioned device, as well as to provide a reinforcement rib 26, projecting to the inside of a low pressure chamber 16, to the disk-like surface of a low pressure chamber 16. A notched part 30 is provided so that a baffle 28 and the projected part 29 of a front cover 10 do not interfere with each other, and also, an open space 31 is formed between the disk surface of a front cover 10 and a baffle 28. The refrigerant flowing in from a suction port 15 flows through the surface of inside wall of the outermost circumference of a low pressure chamber 16, a baffle 28, and a low pressure chamber 16. A part of the refrigerant flows into an open space 31 via notched part 30 to form a heat insulating layer, shutting off heat, and reduces overheating of refrigerant in the low pressure chamber 16.

79. 发明专利

JPS5797973A COMPRESSOR DISCHARGE VALVE 失效
公开(公告)号：JPS5797973A
公开(公告)日：1982-06-17
申请号：JP17094480
申请日：1980-12-05
申请人： HITACHI LTD
发明人： HAYASE ISAO , SUGINUMA ATSUSHI , KISHI ATSUO
IPC分类号： F04B39/10 , F16K15/16
摘要： PURPOSE:To reduce the flow passage resistance and to make a compressor compact by forming discharge port at a cylinder liner or cylinder in proximity of the upper dead point of the discharge valve of a radial type compressor. CONSTITUTION:Multiple number of discharge port 5 is formed in proximity of the upper dead point of each cylinder liner, a ring shaped valve 12 being attached to the outer circumference of each port to tightly seal it by the elasticity thereof. The compressed working gas is discharged to a high pressure gas passage 24 from the discharge port 5 of the cylinder liner 2 near the upper dead point by push opening the ring shaped valve 12. The use of said ring shaped valve 12 eliminates the need for installing a high pressure chamber at the outside of a cylinderhead 4 thereby substantially reducing the size of the compressor, particularly the size in the radial direction.

80. 发明专利

JPS5666478A SCREW TYPE COMPRESSOR 失效
公开(公告)号：JPS5666478A
公开(公告)日：1981-06-04
申请号：JP14126279
申请日：1979-11-02
申请人： HITACHI LTD
发明人： KISHI ATSUO , SASAKI SHIGERU
IPC分类号： F04C29/02 , F04C18/16
摘要： PURPOSE:To improve sealing performance at the rotor section of the screw type compressor, by causing adiabatic expansion of oil separated from coolant gas, and supplying cooled oil to a section where rotors are in mesh with each other while feeding released gas to the inlet side of the rotors. CONSTITUTION:Coolant gas drawn into a rotor section 1 and compressed therein is carried into a primary outlet chamber 4, where the coolant gas is separated into oil and gas. The oil thus separated from the coolant gas is carried via a restriction means 5 into a low-pressure, secondary chamber 6, where it is expanded adiabatically, and oil thus cooled is injected, by means of an oil pump 7, into a section where rotors 2, 3 are in mesh with each other, while released gas is carried to the inlet side of rotors 2, 3. Since, with such an arrangement, viscosity of oil injected to the aforesaid section where rotors 2, 3 are in mesh with each other can be raised if an oil having a low viscosity at a given temperature is used, it is enabled to improve the rotor sealing performance.

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