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1. 发明专利

JPH07119644A COMPRESSOR EQUIPMENT AND METHOD AND SYSTEM FOR CONTROLLING NUMBER OF COMBINATION OF COMPRESSORS 失效
公开(公告)号：JPH07119644A
公开(公告)日：1995-05-09
申请号：JP27136993
申请日：1993-10-29
申请人： HITACHI LTD
发明人： MATSUNO HIDENORI , SAKAI HARUKI
IPC分类号： F01B25/16 , F04B49/06
摘要： PURPOSE:To save the labor of the whole of a device, and to control pressure at a constant value without interfering the control of a different type compressor with each other in the control of the number of combination of turbo compressor and screw compressor. CONSTITUTION:Turbo compressors 10, 20 to be controlled at a constant wind pressure, screw/reciprocating compressors 30, 40 to be controlled by switching load/unload, a receiver tank 2 for storing the compressed air, and a pressure sensor 3 for detecting the internal pressure of the tank are combined. The turbo compressors 10, 20 and the screw/reciprocating compressors 30, 40 are switched for control by a number control board 1 so that they are not interfered with each other to enable the selection of a minimum number of compressor. A compressor equipment to be controlled at a constant pressure value, in which labor is saved in the whole thereof, is thereby realized. Simultaneously, the capacity of a receiver tank 2 is reduced to downsize the whole of a device by controlling the turbo compressors at a constant wind pressure for starting and stop, and the efficient operation without generating a loss due to the blow- off is enabled by restricting the switching of load/unload.

2. 发明专利

JPH01219397A DIFFUSER FOR CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPH01219397A
公开(公告)日：1989-09-01
申请号：JP4382588
申请日：1988-02-26
申请人： HITACHI LTD
发明人： SAKAI HARUKI , ABE YOSHIAKI , NAKAGAWA KOJI
IPC分类号： F04D29/44 , F04D27/02 , F04D29/46
摘要： PURPOSE:To enhance operational efficiency of a compressor by setting auxiliary vanes, which slide axially of an impeller, between the impeller and stationary vanes and setting a whorl developing means which develops whorls in association with the movement of the auxiliary vanes. CONSTITUTION:An impeller 3 is rotatably set downstream inside a suction casing 2. Inserted between the impeller 3 and stationary vanes 5 are auxiliary vanes 11 which have chord lengths smaller than those of the stationary vanes 5 and slide axially of the impeller 3. Plural inlet vanes 20 are arranged inside the suction casing 2. By turning control arms 21, the inlet vanes 20 and the auxiliary vanes 11 are actuated in association. In the above-mentioned fashion, prevention of a surge and reduction of pressure loss are realized over a wide operational range thereby to enable an operation with a high efficiency.

3. 发明专利

JPS64399A DIFFUSER OF HIGH SPEED CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPS64399A
公开(公告)日：1989-01-05
申请号：JP21894187
申请日：1987-09-01
申请人： HITACHI LTD
发明人： NAKAGAWA KOJI , TAKAGI TAKEO , ABE YOSHIAKI , SAKAI HARUKI
IPC分类号： F04D29/44
摘要： PURPOSE:To exceedingly enlarge the range of operational flow rate by providing an auxiliary blade on the side near the inner circumference between plural stator blades and also providing a middle blade on the side near the outer circumference between plural stator blades. CONSTITUTION:An auxiliary blade 7 is provided at the position crossed with a circle passing through the front end of a stator blade 4, while being opposed to the stator blade 4 on only the one blade surface thereof. A middle blade 12 is provided in such a way that it passes through the center of the perpendicular directed from the rear end of the stator blade 4 to the adjacent stator blade 4 and reach the circle passing through the rear end of the stator blade 4. The rapid enlargement in a passage cross-section right after the downstream side of the auxiliary blade 7 and the reduction of a choke flow rate are prevented. Therefore, it is possible to exceedingly enlarge the range of the operational flow rate in a high speed centrifugal compressor.

4. 发明专利

JPH0615879B2 失效
公开(公告)号：JPH0615879B2
公开(公告)日：1994-03-02
申请号：JP24073787
申请日：1987-09-28
申请人： HITACHI LTD
发明人： SAKAI HARUKI , ABE YOSHIAKI , NAKAGAWA KOJI
IPC分类号： F04D29/44

5. 发明专利

JPH0599199A CENTRIFUGAL COMPRESSOR 失效
公开(公告)号：JPH0599199A
公开(公告)日：1993-04-20
申请号：JP25498691
申请日：1991-10-02
申请人： HITACHI LTD
发明人： NAKAGAWA KOJI , KANEKO JUNICHI , SAKAI HARUKI
IPC分类号： F04D29/46
摘要： PURPOSE:To provide a wide operation range and high operating efficiency by arranging vane units with vanes different in chord length on the inner periphery side of resting vanes arranged in a diffuser so that each vane can be projected into a diffuser flow passage selectively for operating flow. CONSTITUTION:In a centrifugal compressor, a flow 2 compressed by an impeller 1 enters into a diffuser 4 encircled by a casing 3, where kinetic energy possessed by the flow 2 is converted into pressure. In this case, several vane units 5 movable toward the rotational axis of the impeller 1 and several resting vanes 6 are arranged. The vane units 5 with short-chord vanes 5a and long-chord vanes 5b integrated are arranged on an annular plate 8 so as to rise on and set in a diffuser passage through the operation of an actuator 7. The vanes 5a are projected into the diffuser passage in the state that the compressor has a large operating flow while the vanes 5b are projected in the state that it has a small operating flow, to provide high efficiency within a white operation range.

6. 发明专利

JPH0425622A FASTENING STRUCTURE FOR ROTATING MEMBER AND SHAFT 失效
公开(公告)号：JPH0425622A
公开(公告)日：1992-01-29
申请号：JP12411090
申请日：1990-05-16
申请人： HITACHI LTD
发明人： MATSUNO HIDENORI , SAKAI HARUKI
IPC分类号： F16D1/06
摘要： PURPOSE:To facilitate mounting and demounting of a rotating member on a shaft so as to maintain the accuracy of coaxial condition by engaging the rotating member with the shaft after inserting an end of the shaft into the rotating member, fitting the end of the shaft to a side of the rotating member, and fixing the shaft and the rotating member coaxially by means of nut threadedly fitted to the shaft. CONSTITUTION:In fastening an impeller 7 to a pinion shaft 4, into an insertion hole of the impeller 7, a threaded shaft 43 side for centering of the pinion shaft 4 is inserted from the side of gear part 71. Into an engaging hole 73 of the insertion hole 72 the pinion shaft 4 is fitted to allow a gear part 71 of the impeller 7 and a gear part of the pinion shaft 4 to mesh with each other. Next, an impeller nut 8 is threaded to the threaded shaft 43 and the impeller 7 is fastened to the pinion shaft 4, thereby maintaining the coaxial accuracy of the pinion shaft 4 and the impeller 7. In demounting the impeller 7 from the pinion shaft 4, the impeller nut 8 is loosened and thereby it is removed, and then releasing the meshing condition of the gears 71, 41. It is thus possible to carry out the mounting and demounting.

7. 发明专利

JP2573292B2 失效
公开(公告)号：JP2573292B2
公开(公告)日：1997-01-22
申请号：JP7414788
申请日：1988-03-28
申请人： HITACHI LTD
发明人： NAKAGAWA KOJI , TAKAGI TAKEO , KANEKO JUNICHI , ABE YOSHIAKI , SAKAI HARUKI
IPC分类号： F04D29/44

8. 发明专利

JPH07332248A METHOD AND DEVICE FOR CONTROLLING COMBINATION NUMBER OF TURBO-COMPRESSORS AND DISPLACEMENT COMPRESSORS AND AIR SOURCE FOR COMPRESSOR EQUIPMENT 失效
公开(公告)号：JPH07332248A
公开(公告)日：1995-12-22
申请号：JP12136594
申请日：1994-06-02
申请人： HITACHI LTD
发明人： MATSUNO HIDENORI , SAKAI HARUKI
IPC分类号： F04D27/00 , F04B49/00
摘要： PURPOSE:To prevent reduction of a pressure during switching or a turbo compressor from unload switching control to constant wind pressure control by a method wherein a relation between the upper and lower limit control pressures of a turbo compressor and the upper and lower limit control pressures of a volume compressor is set to a given range. CONSTITUTION:A compressor equipment comprises two turbo compressors 10 and 20 and the screw compressors 30 and 40 of a volume compressor; a receiver tank 2 for storage of gas fed with a pressure therefrom; and a number of turbo compressors control panel 1. When the upper and lower limit control pressures of the set pressures (the delivery pressures) of the turbo compressors 10 and 20 are P4 and P2 and the upper and lower limit control pressures of the set pressures (the delivery pressures) of the screw compressors 30 ad 40 are P3 and P1, setting is effected so that a relation of P4>P3>P2>P1 is established. This constitution detects a forced feed pressure on a load and performs control of the control pressure of the turbo compressors to a constant value according to the operation state of the volume compressor without interfering control. Thus, a loss owing to blow-off of the turbo compressor is prevented from incurring and the running cost of the equipment is reduced.

9. 发明专利

JPH05141397A IMPELLER WASHING DEVICE FOR ROTARY MACHINE HAVING IMPELLER 失效
公开(公告)号：JPH05141397A
公开(公告)日：1993-06-08
申请号：JP30041291
申请日：1991-11-15
申请人： HITACHI LTD
发明人： SAKAI HARUKI
IPC分类号： F04D29/70
摘要： PURPOSE:To eliminate dust stuck on an impeller without stopping operation of a rotary machine by providing a washing liquid injection nozzle on the intake side of the impeller, and setting, a drain separator for taking in a mixture including the dusts and the washing liquid on the discharging side of the impeller. CONSTITUTION:When a two shaft four step type isothermal compressor is operated, the vibration amount of a rotor 5 by which first and second step impellers 1, 2 are connected to each other, is monitored by a shaft vibration meter 27. When the vibration amount of the rotor 5 exceeds a set value, solenoid valves 22, 24 are opened by a controller 28, and washing liquid supplied from a wash supplying line 21 is injected from the intake side of air toward the first step impeller 1 by an injection nozzle 20 so as to eliminate dust stuck on the impeller 1. The dust is mixed into mist of the washing liquid and compressed air, and supplied to an intercooler 13. The dust collides with a blade fin shaped nest and a collide type separator inside thereof, to be stuck thereon and then corrected. On the other hand, the washing liquid is recovered on the bottom part in the intercooler 13 and reused.

10. 发明专利

JPH0219698A VANE CONTROLLER 失效
公开(公告)号：JPH0219698A
公开(公告)日：1990-01-23
申请号：JP16775388
申请日：1988-07-07
申请人： HITACHI LTD
发明人： TAKAHASHI HIROSHI , SAKAI HARUKI
IPC分类号： F04D29/46
摘要： PURPOSE:To simplify the structure and to reduce the cost of the structure of a vane controller by coupling the drive arm of the vane controller driven through an actuator, through a coupling rod. CONSTITUTION:The drive vane shaft 4a of a first stage vane controller 23a is coupled through a first drive arm 6a and a first coupling rod 7a with an actuator 9. Second drive arms 6b secured to respective vane shafts 4b of vane controllers at respective stage are coupled through a second coupling rod 7b. By such arrangement, vane controllers at plural stages can be controlled by means of a single actuator, and the structure of the vane controller is simplified while the cost thereof is reduced.

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