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1. 发明专利

JPH08135884A LOW THERMAL STRESS STRUCTURE BODY 失效
公开(公告)号：JPH08135884A
公开(公告)日：1996-05-31
申请号：JP27738894
申请日：1994-11-11
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： MATSUDA KENSHO , ABE RYUSUKE , TAKAKUSAKI TSUNEHIKO , ITAMI HIROYUKI , NAKANO SUSUMU , YAMAGUCHI SHIZUKA , TAKEUCHI MAMORU , MATSUZAKA KYO
IPC分类号： F16L57/00 , F16L9/00
摘要： PURPOSE: To reduce the thermal stress even if the temperature distribution in the sectional radial direction or lengthwise direction is large and provide the structure having the prescribed functions, without suppressing the flow of the high temperature fluid and improve the reliability of a plant. CONSTITUTION: As for a structure body which shows the hollow cylinder 1, full cylinder, hollow disc, full disc shaped and axially symmetrical structure, a cut 6 is formed on the surface in contact with the high temperature fluid, and the width of the cut is set to the dimension permitting the slight closure by the thermal expansion, and the depth is set to the value up to the position where the compression stress becomes zero.

2. 发明专利

JPH093647A THERMAL STRESS RELAXATION TYPE COATED HEAT RESISTANT STRUCTURE PART AND ITS PRODUCTION 失效
公开(公告)号：JPH093647A
公开(公告)日：1997-01-07
申请号：JP15131095
申请日：1995-06-19
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YAMAGUCHI SHIZUKA , KOJIMA YOSHIYUKI , BABA NOBORU , TAKAKUSAKI TSUNEHIKO , ITAMI HIROYUKI , NAKANO SUSUMU , MATSUDA KENSHO
IPC分类号： G01M9/04 , C23C16/06
摘要： PURPOSE: To provide thermal stress relaxation type coated heat resistant structure parts by relaxing the thermal stress in the heat resistant coating layer in which temp. distribution is formed so that it is higher in percentage in a cross-sectional radial or longitudinal direction and to improve the reliability of a plant and to provide a method thereof. CONSTITUTION: A coating layer 8 of heat resistant material is laminated on the surface of structure parts 6 by forming a columnar crystal structure 8a, a fine crystalline grain structure 8b, or the columnar crystal structure 8a and the fine crystalline grain structure 8b. This heat resistant coating layer 8 has a function of developing fine cracks in a film-thickness direction by the application of thermal stress and relaxing the thermal stress. By this method, the thermal stress relaxation type coated heat resistant structure parts, excellent in heat resistance and thermal shock resistance, can be produced.

3. 发明专利

JPH08313392A HIGH-PRESSURE PIPE SEPARATING/CONNECTING DEVICE AND IMPACT WIND TUNNEL DEVICE 失效
公开(公告)号：JPH08313392A
公开(公告)日：1996-11-29
申请号：JP12001995
申请日：1995-05-18
申请人： HITACHI LTD
发明人： ITAMI HIROYUKI , TAKAKUSAKI TSUNEHIKO , YOSHINO TOMOYA , ABE RYUSUKE
IPC分类号： G01M9/02 , G01M9/04
摘要： PURPOSE: To connect a compression pipe and a shock tube easily and make the fastening force constant. CONSTITUTION: When nut drive mechanism 2 rotatory-moves a large-sized nut 1 on a compression pipe 11, the compression pipe 11 and a shock tube 14 are both connected so as to be automatically fastened and easily connected without manual help. When the driving torque of the large-sized nut 1 by a rotating drive source 3 reaches the specified value in this connection, the rotating drive source 3 is stopped by a torque monitoring means 8, so that the fastening force of both the compression pipe 11 and shock tube 14 can be made constant. Therefore, there is no need to form the flange parts of the compression pipe 11 and shock tube 14 in large size as by the second conventional technique so as to be able to solve a problem generated in association with enlargement.

4. 发明专利

JPH08334432A FREE-PISTON-TYPE IMPACT WIND TUNNEL DEVICE AND MANUFACTURE THEREOF, AND NOZZLE THROAT THEREOF 失效
公开(公告)号：JPH08334432A
公开(公告)日：1996-12-17
申请号：JP14027995
申请日：1995-06-07
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YAMAGUCHI SHIZUKA , KOJIMA YOSHIYUKI , TAKAKUSAKI TSUNEHIKO , YOSHINO TOMOYA , ITAMI HIROYUKI , NAKANO SUSUMU , MATSUDA KENSHO
IPC分类号： G01M9/02
摘要： PURPOSE: To provide a free-piston-type impact wind tunnel device and manufacture thereof, and the nozzle throat thereof in which a high-durability heat resisting nozzle throat of a thermal stress relieving type that is excellent in heat resistance and heat-shock resistance and capable of operating in a high heat flow velocity region is used. CONSTITUTION: In the wind tunnel device, a hollow cylindrical nozzle throat 33 at the end of an impact wave tube 26 that is exposed to a high velocity air current and subjected to thermal stresses is made of a high strength material at high temperature and is provided with a plurality of splits on its inner circumferential surface, and also a heat-resisting material 7 is filled in the entire or inner circumferential surface of the slits so as to form a smooth inner circumferential surface.

5. 发明专利

JPH08313391A DIAPHRAGM FOR SHOCK TUBE 失效
公开(公告)号：JPH08313391A
公开(公告)日：1996-11-29
申请号：JP11812795
申请日：1995-05-17
申请人： HITACHI LTD
发明人： KIMURA YOSHIKAZU , NAKANO SUSUMU , TAKAKUSAKI TSUNEHIKO , YOSHINO TOMOYA , ITAMI HIROYUKI
IPC分类号： G01M9/02 , G01M9/04
摘要： PURPOSE: To make the reproducibility of membrane rupture pressure and an air current excellent and make the setting of membrane rupture pressure possible by providing the center part of a diaphragm of constant thickness with a groove with constant depth and constant width to the groove bottom flat and parallel to the groove machined surface. CONSTITUTION: A groove 2 intersecting in a cross is machined at the center part of a diaphragm 1. This groove 2 has constant depth and constant width to the groove bottom, and the groove bottom has flat rectangular cross section parallel to the groove machined surface. In the case of the material and plate thickness of the diaphragm 1 being the same, the rupture pressure of the diaphragm 1 can be changed by changing the plate thickness of the groove bottom. Driving pressure can thereby be set to the specified pressure by using the diaphragm 1 with groove part prate thickness, ruptured in correspondence with the driving pressure of the driving gas of a free piston type impact wind tunnel, as a first diaphragm.

6. 发明专利

JPH08309305A METHOD AND APPARATUS FOR CLEANING INSIDE OF TUBE 失效
公开(公告)号：JPH08309305A
公开(公告)日：1996-11-26
申请号：JP11812895
申请日：1995-05-17
申请人： HITACHI LTD
发明人： NAKANO SUSUMU , TAKAKUSAKI TSUNEHIKO , KIMURA YOSHIKAZU , ITAMI HIROYUKI , YOSHINO TOMOYA
IPC分类号： G01M9/00 , B08B9/04 , B08B9/053
摘要： PURPOSE: To surely clean the inside of the tube of a shock tunnel and to well maintain the operability and reproducibility of the shock tunnel by a method in which after a small-sized traveling device being made to travel in a tube to transfer a drive transmission part from one end to the other end of the tube, a cylindrical object is extracted through the drive transmission part. CONSTITUTION: After the arrival of a small-sized traveling device 8 at the end of a tube on the opposite side, a drive transmission part 4 is removed from the traveling device 8, and an extraction driving device 10 of a cleaning tool 1 is fixed on the end surface of the tube. The driving device 10 is constituted by installing a winding drum 6 for taking up the transmission part 4, a motor 5 for rotating the drum 6, and a belt 22 which transmits the drive of the motor 5 to the drum 6 on a base 7. The transmission part 4 which was connected to the traveling device 8 is attached to the drum 6, the motor 5 is operated, and the transmission part is taken up. Then, the cleaning tool 1 makes a cloth surface contact the inner surface of the duct to drive the inside of the duct to wipe off dirt on the inner surface of the tube.

7. 发明专利

JP2000202776A SURFACE FINISHING DEVICE FOR LARGE VACUUM CONTAINER 失效
公开(公告)号：JP2000202776A
公开(公告)日：2000-07-25
申请号：JP610499
申请日：1999-01-13
申请人： HITACHI LTD
发明人： OTAKA KENJI , SATO OSAMU , ITAMI HIROYUKI
IPC分类号： B24C3/06
摘要： PROBLEM TO BE SOLVED: To reduce gas emitted from a vacuum container in evacuation by installing a rotary table freely rotating within a horizontal plane on a truck moved on a rail installed in the vacuum container, providing a movable frame capable of moving in the vertical direction, and fixing a surface finishing device to the frame. SOLUTION: A rotary table 4 freely rotating within a horizontal plane is installed on a truck 3 freely moving on a rail 2 installed in the interior of a vacuum container 1. A rotary guide 5 is fixed to the rotary table 4, and a rotary frame 6 is rotatably installed along the guide. A rotation transmitting ring 7 is fixed through the rotary frame 6, and on the opposite side, a fitting frame 8 and a moving frame 10 capable of moving in the vertical direction of the rotating shaft of the rotation transmitting ring 7 are installed. A surface finishing device 11 is fixed to the moving frame 10. By this arrangement, surface finishing suitable for evacuation is applied to the surface of the vacuum container 1, so that in evacuation, gas emitted from the vacuum container 1 can be reduced.

8. 发明专利

JPH0979937A HEAT-RESISTANT AND PRESSURE-RESISTANT STRUCTURE, ITS MANUFACTURE, FREE-PISTON TYPE SHOCK WIND TUNNEL DEVICE, AND MANUFACTURE OF SHOCK TUBE OF THIS WIND TUNNEL DEVICE 失效
公开(公告)号：JPH0979937A
公开(公告)日：1997-03-28
申请号：JP23163095
申请日：1995-09-08
申请人： HITACHI LTD , HITACHI NUCLEAR ENG
发明人： YAMAGUCHI SHIZUKA , KOJIMA YOSHIYUKI , TAKAKUSAKI TSUNEHIKO , YOSHINO TOMOYA , ITAMI HIROYUKI , NAKANO SUSUMU , MATSUDA KENSHO
IPC分类号： G01M9/02
摘要： PROBLEM TO BE SOLVED: To provide a free-piston type shock wind tunnel device using shock tube parts composed of a metallic material having a high melting point, high toughness, and a high strength, a method for manufacturing the tunnel device, and a shock tube. SOLUTION: In a free-piston type wind tunnel device, a cylindrical shock tube 26 which is exposed to a high-speed air flow and receives a thermal stress is made of a metallic material having a high melting point, high toughness, and a high strength and the internal surface of the tube 26 is coated with a heat protective Ni or Ni-alloy liner 261.

9. 发明专利

JPH07317714A NOZZLE THROAT MEMBER FOR IMPULSIVE WIND TUNNEL 失效
公开(公告)号：JPH07317714A
公开(公告)日：1995-12-08
申请号：JP11504394
申请日：1994-05-27
申请人： HITACHI LTD
发明人： ITAMI HIROYUKI , WADA YUKIHIKO , KOJIMA YOSHIYUKI
IPC分类号： G01M9/04 , B05B1/00 , B64G7/00 , F15D1/00
摘要： PURPOSE:To restrain a deep crack which has reached a non-recrystallized layer from advancing in the downstream direction in a nozzle throat to be used for an impulsive wind tunnel. CONSTITUTION:In a nozzle throat member 1 provided with a function for throttling a passage in order to generate supersonic flow in a wind tunnel device for generating supersonic flow, and having its passage 1B formed into a circular shape in section, at least one type of materials for constituting the nozzle throat member is made of high melting point materials such as tungsten, molybdenum, etc. The nozzle throat member has Vickers hardness of Hv210 or more and is formed into flat so that crystal grains of a metallic fiber may be parallel to each other, and a flow passage 1B is formed in a direction that the passage axis is approximately perpendicular to a flat surface 1D of the crystal grains. Thereby, a shallow cracks is generated only on the front layer on the throat inner surface, but a deep crack which has reached the non-recrystallized range can be restrained from advancing in the downstream direction, as a result, turbulence can be restrained many times more than the conventional times, thereby the replacement frequency of the nozzle throat can be decreased.

10. 发明专利

JPH07256372A MANUFACTURE OF LIGHTWEIGHT HONEYCOMB 失效
公开(公告)号：JPH07256372A
公开(公告)日：1995-10-09
申请号：JP5617794
申请日：1994-03-25
申请人： UCHU TSUSHIN KISO GIJUTSU KENK , HITACHI LTD , MITSUBISHI ALUMINIUM
发明人： KOBAYASHI AKIHIKO , OKAMOTO TERUYOSHI , ITAMI HIROYUKI , WADA YUKIHIKO , IMAMURA YOSHIHIDE , TAKEMURA HIROSHI
IPC分类号： B21D47/00 , B32B3/12
摘要： PURPOSE:To provide a method to manufacture a lightweight honeycomb where a core can be connected to a face plate orderly. CONSTITUTION:In a method to manufacture a lightweight honeycomb consisting of cores and face plates where a cell is roughly constituted by the cores made of sheet, the cores 1 are assembled, and several parts of the abutted parts of the cores 1 are spot welded 3 to constitute the cores 2. Then, face plates 5 are arranged above and below the cores 2, and the abutted parts of the cores 2 and the face plates 5 are brazed while the upper face plates 5 is suspended by a stainless steel plate 8.

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