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21. 发明专利

JP2001258190A ROTARY ELECTRIC MACHINE 失效
公开(公告)号：JP2001258190A
公开(公告)日：2001-09-21
申请号：JP2000073905
申请日：2000-03-13
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , MORI HIDEAKI , KIEDA SHIGEKAZU , SHIOBARA RYOICHI , HATTORI KENICHI , KOMURA AKIYOSHI
IPC分类号： H02K1/32 , H02K9/06 , H02K9/08
摘要： PROBLEM TO BE SOLVED: To realize efficient ventilation cooling of a rotor at low cost by reducing pressure loss of an inlet part channel to an axial channel for supplying cooling gas to the rotor. SOLUTION: An inlet part channel 8 to an axial channel 9 for cooling the inside of a rotor 1 comprises a protruding part 8a formed in the axial direction on the surface of a rotor spindle at a lower part between rotor coil ends 6, and a groove part 8b formed between the protruding parts. The protruding part is tapered increasingly toward the downstream side and the axial length L of the protruding part is set longer than the difference (R2-R1) between the largest radius R2 and the smallest radius R1.

22. 发明专利

JPH11166757A CLEAN ROOM 失效
公开(公告)号：JPH11166757A
公开(公告)日：1999-06-22
申请号：JP33433297
申请日：1997-12-04
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , HAMAMOTO MASAHIRO
IPC分类号： F24F7/06 , B01D46/52 , F24F13/08
摘要： PROBLEM TO BE SOLVED: To make air flows in a clean room uniform even when the number of filters is remarkably reduced by providing wind vanes immediately below fan filter units and making part of the air discharged vertically downward from the fan filter units to flow to the outsides of area below the fan filter units. SOLUTION: When wind vanes 10 are installed to fan filter units 4 having a width D, L=αD, and H=βD, where, α=3, and β=1/3 θ=45 deg., the air flows in the area below the ceiling between the fan filter units 4 become eddy-free smooth flows. In addition, the uniformity of the air flows in the areas immediately below the units 4 are also improved and a nearly uniform flow velocity distribution is obtained. When the installed angle θof the wind vanes 10 are set about 40 deg.-60 deg., the uniformity of the flow velocity distribution at a height of 2.5 D from a grating floor can be improved effectively. Since the air flows can be made uniform throughout a clean room without using any partition wall, etc., the layout change of a semiconductor manufacturing device can be carried out easily.

23. 发明专利

JPH04175613A DETECTOR FOR ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPH04175613A
公开(公告)日：1992-06-23
申请号：JP30242790
申请日：1990-11-09
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO
IPC分类号： G01F1/58
摘要： PURPOSE:To make it possible to attach one kind of electromagnetic flowmeter to various diameters of piping arrangement by dividing a magnetic pole into the section to be included in a magnetic field generating device and the section to be included in a measurement tube section so that magnetic field generating device. CONSTITUTION:A measurement tube section comprises a measurement tube 6 with its inner surface lined with an insulation lining 7 and provided with a pair of electrodes 8, auxiliary magnetic poles 5a and 5b attached to plat springs 11a and 11b, and a signal takeout connector 12 attached to the electrodes 8. These components are secured with a measurement section casing 9 of a nonmagnetic material. A magnetic field generating section comprises a measurement tube section holding member 10 of a nonmagnetic material to be in contact with the measurement tube section, magnetic poles 3a and 3b, exciter coils 4a and 4b, and a core 2 attached to the magnetic poles, and they are secured with a casing 1. Constituting the measurement tube section as described above, the measurement tube section having a measurement tube of different bores is made possible.

24. 发明专利

JPH03175320A ELECTROMAGNET FLOWMETER AND FLOWRATE/CORRECTING APPARATUS 失效
公开(公告)号：JPH03175320A
公开(公告)日：1991-07-30
申请号：JP10761590
申请日：1990-04-25
申请人： HITACHI LTD
发明人： FUKUNAGA MASAO , UEMATSU IKUO , IKEGAWA MASAHIRO , KAIHO MASAYUKI
IPC分类号： G01F1/58 , G01F1/60 , G01F25/00
摘要： PURPOSE:To reduce costs by providing a parameter setting part which sets piping conditions of a fluid within a duct, a span correcting data memory part set beforehand corresponding to the parameter, and a correcting/operating part which corrects a detecting signal from an electrode. CONSTITUTION:A detecting signal 2 from a detector of an electromagnetic flowmeter is converted and outputted as a flow rate signal 8 at an operating part 3 within a correcting/operating device 1. Various parameters set in a parameter setting part 4 in order to correct the sensitivity deterioration and influences due to shortening of the distance between surfaces are, while being confirmed at a parameter display part 5, inputted to a memory part 6. Correcting data preliminarily obtained through analysis corresponding to the set parameters are stored in a span correcting table 7 of the memory part 6 and selected according to the conditions of the parameters. The span is corrected and operated in an operating part 3 based on the correcting data.

25. 发明专利

JPH0341318A DETECTOR OF ELECTROMAGNETIC FLOWMETER 失效
公开(公告)号：JPH0341318A
公开(公告)日：1991-02-21
申请号：JP17549389
申请日：1989-07-10
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO , FUKUNAGA MASAO , UEMATSU IKUO
IPC分类号： G01F1/58
摘要： PURPOSE:To facilitate fitting to a piping system and also to shorten a length of insertion into the piping system by separating a measuring tube element fitted with electrodes from a magnetic field generating device and by separating the magnetic field generating device vertically so that each part of the separated device contains an exciting coil. CONSTITUTION:A detector is constructed of a measuring tube 5 having an insulative lining 6 provided inside, two sets of magnetic filed generating devices provided vertically and having exciting coils 4a and 4b and magnetic poles 3a and 3b generating a magnetic field in the radial direction of the measuring tube 5, a pair of electrodes 7a and 7b positioned on a straight line intersecting the direction of the magnetic field and the direction of the axis of the tube perpendicularly and fitted inside the measuring tube 5, and casings 1a and 1b housing the whole. The coils 4a and 4b and the magnetic poles 3a and 3b are fitted to cores 2a and 2b provided so that the magnetic field may not leak outside, and further the cores 2a and 2b are fitted to the casings 1a and 1b. By separating the magnetic field generating device in two vertically and further by separating the magnetic field generating devices from the measuring tube 5, in this way, an operation for fitting can be facilitated.

26. 发明专利

JP2000308311A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JP2000308311A
公开(公告)日：2000-11-02
申请号：JP10622199
申请日：1999-04-14
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , MORI HIDEAKI , KIEDA SHIGEKAZU , SONOBE TADASHI , SHIOBARA RYOICHI , SENBA AKIOMI , HATTORI KENICHI , ABE YOSHIKI
IPC分类号： H02K1/20 , H02K9/12 , H02K9/18
摘要： PROBLEM TO BE SOLVED: To provide a rotating electric machine, in which the amount of cooling air to an axial direction central part is ensured and the axial direction temperature distribution of a rotor and a stator is made uniform, especially in a large capacity machine. SOLUTION: An in-machine gas cooler 8 is divided into two or more partial channels. Flows in two directions corresponding to each of the partial channels are formed. A connection channel 18 of a stator to the cooler is positioned in the radial direction outside of the stator 2 and connects each of the partial regions divided into two or more parts in the axial direction by a bulkhead 14 with each of the partial channels in the in-machine gas cooler 8. A cool gas can be guided directly to the axial direction central part of the stator without increasing the total draft resistance. Thereby the temperature increase in the axial direction central part of a stator and a rotor which especially becomes a problem in a large capacity machine can be prevented.

27. 发明专利

JP2000296306A FINE FILTER UNIT 失效
公开(公告)号：JP2000296306A
公开(公告)日：2000-10-24
申请号：JP10622099
申请日：1999-04-14
申请人： HITACHI LTD
发明人： ABE YASUO , KAIHO MASAYUKI , TAKADA YOSHIHIRO , TOYAMA YUJI , ISHIKAWA TOMINORI
IPC分类号： B01D46/00 , F24F7/00
摘要： PROBLEM TO BE SOLVED: To minimize the depth and height of the whole unit and to easily uniformize the wind-speed distribution at an air filter outlet by forming a unit top board in the blow-off direction of a centrifugal fan so that the unit top board has a shape having inclination approaching to the filter surface with an increase in the distance from a blow-off port of the centrifugal fan. SOLUTION: When the fan 106 rotates, external air is taken in from an air intake disposed at the upper side of a fan casing 102 and blown off to an air filter casing part 103 from an external air blow-off port 109. The air enters into an air regulating part 105 and is purified through an air filter 104 and then is blown off into a clean room. At this time, in the air regulating part 105, the inclination approaching to the filter surface with an increase in the distance from the blow-off port of the fan 106 is imparted to a casing top board in the blow-off direction of the fan 106. In this way, the sectional area in the air regulating part 105 is narrowed gradually and the blow-off from the air filter 104 is controlled and the deviation of the wind-speed distribution is eliminated.

28. 发明专利

JP2559522B2 失效
公开(公告)号：JP2559522B2
公开(公告)日：1996-12-04
申请号：JP10761590
申请日：1990-04-25
申请人： HITACHI LTD
发明人： FUKUNAGA MASAO , UEMATSU IKUO , IKEGAWA MASAHIRO , KAIHO MASAYUKI
IPC分类号： G01F1/58 , G01F1/60 , G01F25/00

29. 发明专利

JPH08320897A PARALLEL NUMERICAL ANALYSIS METHOD 失效
公开(公告)号：JPH08320897A
公开(公告)日：1996-12-03
申请号：JP12774695
申请日：1995-05-26
申请人： HITACHI LTD
发明人： KAIHO MASAYUKI , IKEGAWA MASAHIRO
IPC分类号： G06F15/16 , G06F17/50
摘要： PURPOSE: To provide the numerical analysis method which is short in calculation time and can take a large-scale analysis and uses plural meshes by assigning processors to the respective meshes and performing calculation, and separately providing a processor which generates data for receiving and passing calculation results between the processors. CONSTITUTION: The meshes includes three kinds of mesh, i.e., a mesh 1 for the calculation of the whole analytic area, a circular mesh 2, and a square mesh 3. A processor 1, a processor 2, and a processor 3 are put in charge of the calculation of the respective meshes. A processor 0 generates the data for receiving and passing the calculation results. The calculating processes of the meshes are performed in parallel and then the processor 0 generates the data for receiving and passing the calculation results. After the data for receiving and passing the results are generated, the calculation results are transferred between the processors. Convergence is decided at the point of time and when the convergence is obtained, the calculation is ended, but when not the said flow is repeated by making a return to the calculation of the respective meshes.

30. 发明专利

JPH08193912A METHOD FOR CREATING ANALYTIC LATTICE 失效
公开(公告)号：JPH08193912A
公开(公告)日：1996-07-30
申请号：JP470995
申请日：1995-01-17
申请人： HITACHI LTD
发明人： SHIMIZU ISATO , KATO CHIYUKI , KAIHO MASAYUKI , IKEGAWA MASAHIRO
IPC分类号： G01M9/00 , G06F17/50
摘要： PURPOSE: To save the memory capacity and the amount of calculation while keeping high accuracy by dividing an overlapping lattice in the analytic region of finite element method finely by octant method. CONSTITUTION: A lattice overlapping a finite mesh 105 stretched around an analytic object 101 is divided finely by octant method. In other words, a differential lattice 102 at a division level 1 is subjected to octantal division to obtain a differential lattice 103 at division level 2 which is further divided into a differential lattice 104 at division level 3. The element division is carried out by selecting a lattice point 706 (707) of a concerned element 705 on the negative (positive) side plane in the direction 3 for all lattice points (m) with reference to an element lattice point reference table. A lattice point 708 located between the lattice points 706, 707 an another lattice point 709 linked therewith are then determined with reference to a lattice point linking table. Subsequently, unlinked lattice points 708 are linked 710 to obtain a new element 711 (global number m+ 1). Since the density of lattice can be regulated around the analytic region of finite element method and other part, memory capacity and the amount of computation can be saved.

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