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1. 发明专利

JPS5925852B2 JPS5925852B2 - 失效
公开(公告)号：JPS5925852B2
公开(公告)日：1984-06-21
申请号：JP2211376
申请日：1976-03-03
申请人： Hitachi Ltd
发明人： KURODA MICHIO , NAKAMURA SHOZO , UCHAMA YOSHIHIRO , FUKUI HIROSHI , OOYABU KATSUMI , TAKI TAKAMITSU
IPC分类号： F01K23/10 , F01K7/00 , F01K13/00 , F03G4/00 , F03G7/00
CPC分类号： Y02E20/16

2. 发明专利

JPS5813221A WATCHING APPARATUS FOR TILTING PAD BEARING 失效
公开(公告)号：JPS5813221A
公开(公告)日：1983-01-25
申请号：JP11072481
申请日：1981-07-17
申请人： HITACHI LTD
发明人： INOUE TOMOAKI , MATSUO YOSHINORI , IKEUCHI KAZUO , KOGA TSUGUAKI , OOYABU KATSUMI
IPC分类号： F16C17/24 , F16C37/00
摘要： PURPOSE:To prevent accidents by a method wherein oil film pressure on the contacting surface of a bearing and a metal temperature near the contacting surface thereof are measured regularly and an unusual condition of the bearing is detected at an early time. CONSTITUTION:Pressure measuring apertures 10 are dottedly bored in plurality on the contacting surface 9 of a bearing, oil film pressure is detected by a pressure sensor 12, and a metal temperature near the contacting surface is detected by a thermocouple 7. When a diagnosis routine begins, the above described data are taken in. In case of a low speed rotation of the journal, a diagnosis of metal wiping is performed, and in case of medium and high speed, a diagnosis of a change of load and end bearing is carried out. Bearing load is calculated out on the basis of oil film pressure detected by the pressure 12 so that watch of a change of bearing load may be conducted precisely.

3. 发明专利

JPS6131324B2 失效
公开(公告)号：JPS6131324B2
公开(公告)日：1986-07-19
申请号：JP2048180
申请日：1980-02-22
申请人： HITACHI LTD
发明人： KOGA TSUGUAKI , IKEUCHI KAZUO , INOE TOMOAKI , OOYABU KATSUMI
IPC分类号： F16C17/24 , G01K13/00 , G01M13/04

4. 发明专利

JPS585405A DEVICE FOR COUPLING MOVING VANES OF TURBINE 失效
公开(公告)号：JPS585405A
公开(公告)日：1983-01-12
申请号：JP10121181
申请日：1981-07-01
申请人： HITACHI LTD
发明人： NAMURA KIYOSHI , KUNO KATSUKUNI , IKEUCHI KAZUO , SHIBAOKA HAJIME , UENISHI AKIRA , OOYABU KATSUMI
IPC分类号： F01D5/22
摘要： PURPOSE:To damp the vibration of moving vanes, by fitting the two mutually perpendicularly intersecting protrusions of a pair of coupling plates in the overhangs of the adjacent moving vanes to provide a prescribed gap between them and couple the front and rear of their tips to each other to restrict the untwisting of the vanes. CONSTITUTION:During rotation, untwisting moment acts due to centrifugal force so that the gap G between the overhangs 8a, 9b of moving vane 1, 2 increases to a value G'. The value G' is determined from the gap F between protrusions 26, 28 at standstill. During the rotation, the contact sides 30, 31 of the protrusions 26, 28 come into contact with each other to restrict the untwisted quantity of the moving vanes within a desired range. The centrifugal force of a coupling member 14 is borne by the contact of a pin 16 with the inside of the through hole 12a of the moving vane 1 and the contact of the top of the coupling member with the bottom of the overhang 9b of the other moving vane 2 so that the overhang bears some of the centrifugal force. When the moving vanes are vibrated in the circumferential direction, relative small slip motion is caused between the contact sides of the protrusions 26, 28 so that the friction has a damping effect on the vibration.

5. 发明专利

JPS572405A ROTARY BLADE CONNECTOR OF AXIAL-FLOW ROTARY MACHINE 失效
公开(公告)号：JPS572405A
公开(公告)日：1982-01-07
申请号：JP7581980
申请日：1980-06-05
申请人： HITACHI LTD
发明人： NAMURA KIYOSHI , KUNO KATSUKUNI , UENISHI AKIRA , IKEUCHI KAZUO , NISHIMURA MAKOTO , SHIBAOKA HAJIME , ISHIDA AKIRA , OOYABU KATSUMI
IPC分类号： F01D5/22 , F01D5/26 , F04D29/38
摘要： PURPOSE:To improve vibration damping effect and maintain good connecting conditions in turbine blade connecting area by providing projections formed on both back and front sides of a blade face with connecting pieces brought in close contact to each other due to an untwist of rotary blades during their rotation. CONSTITUTION:Adjacent blades 1a, 1b are provided with projections 3a, 3b extending from suction sides of the blades as well as projections 4a, 4b extending from pressure sides. A hole 5 made at the top of each projection extends in the longitudinal direction of the projection and one connecting piece 12 is inserted in each hole 5. The connecting piece 12 is shaped so as not to rotate in the hole 5 and its vizor 17 is provided with a tapered face 18. Although a couple of forces 21, which produces untwist of blades by a centrifugal force works on blades during their rotation, vibrations are damped by frictional forces between tapered faces 18 between vizor 17 and projection end faces 11, and between connecting piece jaw 15 and hole jaw 8.

6. 发明专利

JPS572404A TURBINE ROTARY BLADES CONNECTOR 失效
公开(公告)号：JPS572404A
公开(公告)日：1982-01-07
申请号：JP7436780
申请日：1980-06-04
申请人： HITACHI LTD
发明人： KUNO KATSUKUNI , IKEUCHI KAZUO , NISHIMURA MAKOTO , SHIBAOKA HAJIME , NAMURA KIYOSHI , ISHIDA AKIRA , OOYABU KATSUMI
IPC分类号： F01D5/22
摘要： PURPOSE:To restrain untwist and damp vibration of rotary blades by bringing upward a pair of connecting members engaged with each other, into contact with vizors in fore and back edges of adjacent rotary blades during an operation, so that said rotary blades may be engaged with each other. CONSTITUTION:Connecting faces 18, 19, which are faces of end parts 12a, 13a of connecting pieces 12, 13, come in contact with each other during an operation and forces act to each other for restraining the amount of untwist of rotary blades within a desirable limit. In case rotary blades 1, 2 vibrate in X direction, that is, the circumferential direction, a very small sliding motion is started between connecting faces 18 and 19 of connecting pieces 12 and 13, and principally the friction between said faces 18 and 19 exhibits a significant effect on damping the vibration. While in case the rotary blades vibrate in Y direction, that is, the axial direction, principally the frictional force on faces of the connecting pieces 12, 13 touching the lower faces of vizors 8a, 9b of rotary blades 1, 2 which is a pressure receiving surface of centrifugal force of connecting pieces 12, 13, are quite effective on damping vibrations.

7. 发明专利

JPS56154640A METHOD FOR MONITORING BEARING 失效
公开(公告)号：JPS56154640A
公开(公告)日：1981-11-30
申请号：JP5786680
申请日：1980-05-02
申请人： HITACHI LTD
发明人： IKEUCHI KAZUO , KOGA TSUGUAKI , INOUE TOMOAKI , OOYABU KATSUMI
IPC分类号： F16C17/24 , G01M13/04 , G01M99/00 , G07C3/00
摘要： PURPOSE:To confirm the state of operating bearings by calculating the loads on the bearings from the oil film pressure on the sliding surfaces of the bearings. CONSTITUTION:An orifice 11 with a small diameter which is communicated to a hole 10 is formed in the bearing 2. A pan 13 wherein a pressure sensing hole 6 is formed is provided in the hole 10, and a temperature sensor 14 is fixed to the pan 13. The pressure oil which transmits the oil film pressure is transmitted to a pressure sensor 17 via the orifice 11. Number of rotations N is sensed by a sensor 18a, and inputted to an RPM judging device 51. The output signal thereof is inputted to a bearing-load calculated value store 52 comprising a low-speed-reference calculated value store 53 and a high-speed-reference calculated value store 54. The output from the store 52 is inputted to a reference-calculated-value calibrating device 55, where the reference calculated value is calibrated to the value which matches the actual state of the bearing, corresponding to the actual metal temperature and pressure measured by the oil film sensor 17 and the bearing metal temperature sensor 14. After the calibration, the bearing load is calculated by a load calculator 56, and the result is transmitted to a warning display 57.

8. 发明专利

JPS56118640A DIAGNOSING METHOD FOR ABNORMALITY OF BEARING 失效
公开(公告)号：JPS56118640A
公开(公告)日：1981-09-17
申请号：JP2048180
申请日：1980-02-22
申请人： HITACHI LTD
发明人： KOGA TSUGUAKI , IKEUCHI KAZUO , INOUE TOMOAKI , OOYABU KATSUMI
IPC分类号： F16C17/24 , G01K13/00 , G01M13/04
摘要： PURPOSE:To make it possible to early detect the abnormal conditions of a bearing, such as inclination, by a method wherein the metal temperature in the neighborhood of the bearing sliding surface is detected at a plurality of portions, and the metal temperature difference between these portion and the reference temperature difference value are compared with each other. CONSTITUTION:In the detecting position 10 on the Babbit metal 5 surface of the lower-half bearing 2, four holes 10a are formed, two of them being located at axially symmetric positions and the other two at circumferentially symmetric positions, and metal temperature sensors 12 are installed in the holes 10a. The metal temperature signals T1-T4 from the metal temperature sensor 12 at the four portions are inputted to an arithmetic apparatus 18, to which the bearing oil temperature signal 0 is also inputted from an oil temperature sensor 7c. On the other hand, the load, the number of revolutions R and the on/off signal of the oil lifter are inputted to the arithmetic apparatus 18 from an operational condition detector 17. In said arithmetic apparatus 18, the metal temperature difference between said portions and the reference temperature difference value are compared with each other in order to diagnose the existence to abnormality of the bearing. Thereby, the abnormal conditions of the bearing can be detected at an early stage.

9. 发明专利

JPS5674632A ABNORMALITY DIAGNOSTIC METHOD OF BEARING 失效
公开(公告)号：JPS5674632A
公开(公告)日：1981-06-20
申请号：JP15209479
申请日：1979-11-26
申请人： HITACHI LTD
发明人： KOGA TSUGUAKI , IKEUCHI KAZUO , INOUE TOMOAKI , YONEYAMA TAKAO , OOYABU KATSUMI
IPC分类号： G01M13/04 , F16C17/24
摘要： PURPOSE:To easily detect an abnormal bearing, by installing the metal temperature sensor to the part which is right under the lower half bearing so as to be symmetrical to the axial direction, also providing the metal temperature sensor at intervals of some distance in the circumferential direction in the same way, and monitoring the temperature. CONSTITUTION:The metal temperature signals T1-T4 from the metal temperature sensor 12 embeded in the 4 detection holes 10 which are right under the lower half bearing 2 are input to the diagnostic arithmetic device 100. On the other hand, not only the operation conditions 17 such as load, rotational frequency, turning on-off, etc. but also the oiling temperature signal T0 from the bearing oiling temperature sensor 12a are input to the diagnostic arithmetic device 100. And the sound signal energy value gamma from he sound sensor 16 and the sound signal generation frequency value gamman measured by the counter 21 are also input to the diagnostic arithmetic device 100, and the existence of abnormality is diagnosed by the bearing metal wiper, etc. from these signals in the device 100.

10. 发明专利

JPS52133448A SCALE ADHERENCE PREVENTIV PROCESS IN NATURAL STEM POWER PLANT INSTA LLATION 失效
公开(公告)号：JPS52133448A
公开(公告)日：1977-11-08
申请号：JP5001376
申请日：1976-05-04
申请人： HITACHI LTD
发明人： NAKAMURA SHIYOUZOU , KURODA TOMOO , UCHIYAMA YOSHIHIRO , FUKUI YUTAKA , OOYABU KATSUMI , TAKI TAKAMITSU
IPC分类号： F24J3/08 , F01K21/06 , F01K23/10 , F03G4/00 , F22B37/48 , F22B37/54
摘要： PURPOSE:The detection of the concentration of the scale generating ingredients in the hot water inside the natural steam heater facilitates to prevent properly the scale adherence in replacement of hot water which has dense scale generating ingredients to hot water having thin same ingredients.

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