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1. 发明专利

JPH01230908A CONTROL METHOD OF STEAM TURBINE HEATER 失效
公开(公告)号：JPH01230908A
公开(公告)日：1989-09-14
申请号：JP5354688
申请日：1988-03-09
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAKETOMO MASAKI , NISHINOMIYA TAKUJI , KUWAJIMA HIDESUMI
IPC分类号： F22G1/00 , F22G3/00 , F22G5/20
摘要： PURPOSE:To hold the lowering of turbine output minimum by changing over the steam pressure set value of a second-stage heater, lowering the aim set pressure and reducing thermal stress produced in the system of the second-stage heater at the time of a failure of a first-stage heater. CONSTITUTION:When steam set pressure of a second-stage heater is PA and steam temperature is TA at the time before an failure of a first-stage heater 4, in the case where the first-stage heater 4 gets out of order and the steam set pressure of the second-stage heater is lowered down to PB, steam temperature is lowered from PA to PB. Since the temperature difference between high pressure turbine exhaust and second-stage heating steam is lessened by changing over the set pressure of the second-stage heating steam and thermal stress yielded in a second-stage heater 5 is reduced, continuous operation of the second- stage heater 5 is allowed. Therefore, the lowering of turbine output is held minimum because the temperature of steam supplied in the second-stage heater is heightened as compared with the case where the first-stage heater is stopped and first steam is bypassed to the second-stage heater 5.

2. 发明专利

JPS61207805A WARMING OF REDUCING VALVE OF STEAM TURBINE AND APPARATUS THEREOF 失效
公开(公告)号：JPS61207805A
公开(公告)日：1986-09-16
申请号：JP4749085
申请日：1985-03-12
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NISHINOMIYA TAKUJI , KANEDA HIDEAKI , MAEDA TAKAYOSHI , KUWAJIMA HIDESUMI
IPC分类号： F01D25/10
摘要： PURPOSE:To shorten the starting time by shortening the warming time for a reducing valve by automatically controlling the opening degree and the opening and closing timing of the warming valve of a steam reducing valve according to the temperature distribution state of a turbine. CONSTITUTION:In order to warm the steam reducing valve 3 of a turbine 4, a warming valve 5 installed onto a main steam stop valve 2 is controlled by a warming-valve opening-degree adjustor 6. A mode discriminating device 7 receives each temperature signal of the first high-pressure stage inner-wall temperature detector 8, reducing-value inner-wall temperature detector 10 and a reducing-valve outer-wall temperature detector 11 in the high pressure turbine 4, and selects the pattern of a previously set opening degree and the opening and closing timing according to the above-described temperature, and sends the valve control signals into the opening-degree adjustor 6 according to said pattern. Therefore, the warming valve 5 can be controlled according to the turbine temperature distribution state, and warming can be performed in the shortest time, suppressing the thermal stress of the reducing valve 3.

3. 发明专利

JPS61206871A VALVE-SEAT SEALING APPARATUS FOR BUTTERFLY VALVE 失效
公开(公告)号：JPS61206871A
公开(公告)日：1986-09-13
申请号：JP4660385
申请日：1985-03-11
申请人： HITACHI LTD
发明人： TAKETOMO MASAKI , KUWAJIMA HIDESUMI , IWATA NAOHIKO
IPC分类号： F16K1/226
摘要： PURPOSE:To prevent the sticking at a valve seat by installing a sealing piece which contacts with a part of a valve piece, with a necessary surface pressure for sealing the valve seat, onto a static valve piece. CONSTITUTION:A valve piece 2 is stopped through the contact between a part of a valve box 1 and the valve seat of a stopper 4, and the top edge of the valve piece 2 is pressed onto the stopper 4. As for the stopper 4, the top edge of the valve piece 2 and the stopper surface are vertical for the center line of a flow passage so that the valve piece 2 and the stopper 4 are not stuck. The contact surface between the valve piece 2 and a sealing piece 3 is formed into a taper forming an angle for the center line of the flow passage, and a surface pressure is generated. A part of the valve piece 2 is bitten into the valve seat 3 by the surface pressure, and sealing is performed.

4. 发明专利

JPS6185505A Load runback method of steam turbine for transformer plant and device thereof 失效
标题翻译：用于变压器设备的蒸汽涡轮机的负载运行方法及其装置
公开(公告)号：JPS6185505A
公开(公告)日：1986-05-01
申请号：JP20706484
申请日：1984-10-04
申请人： Hitachi Ltd
发明人： KANEDA HIDEAKI , KUWAJIMA HIDESUMI
IPC分类号： F01D21/00 , F01D17/14 , F01D21/14
CPC分类号： F01D17/145
摘要： PURPOSE:To hold a rise in turbine revolving speed down to low, by quickly closing a valve to the extent of the throttlled desired position calculated by an operating parameter just before the time when such a situation as requiring the quick throttle of a main steam control valve occurs in a transformer plant. CONSTITUTION:In a transformer plant, when load runback or first cutback is produced there and thereby necessitation to do the quick throttle of a main steam control valve occurs, a throttled desired position of the control valve is calculated on the basis of an operating parameter just before the occurrence. And, the control valve is throttle down to the extent of this desired position. With this constitution, a rise in turbine revolving speed is checked down to the lowest and, what is more, disturbances to boiler feed control or the like are well reducible.
摘要翻译：目的：为了将涡轮转速提高到低水平，通过在需要快速节流主蒸汽控制的这种情况之前快速关闭阀门到操作参数计算出的节流期望位置的程度阀门发生在变压器设备中。构成：在变压器工厂中，当在其中产生负载回流或第一次削减时，因此需要进行主蒸汽控制阀的快速节流，根据操作参数仅计算控制阀的节流期望位置在发生之前。并且，控制阀被节流到该期望位置的程度。利用这种结构，涡轮机转速的上升被检测到最低，并且更重要的是，对锅炉进料控制等的干扰是可以很好地缩减的。

5. 发明专利

JPS60149807A CONTROLLER FOR REHEATER OF STEAM TURBINE 失效
公开(公告)号：JPS60149807A
公开(公告)日：1985-08-07
申请号：JP562484
申请日：1984-01-18
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： NISHINOMIYA TAKUJI , IKEDA HIROSHI , MAEDA TAKAYOSHI , KUWAJIMA HIDESUMI
IPC分类号： F22G1/00

6. 发明专利

JPS5845564B2 失效
公开(公告)号：JPS5845564B2
公开(公告)日：1983-10-11
申请号：JP8774978
申请日：1978-07-20
申请人： HITACHI LTD
发明人： KOIDE YOSHIMI , KUWAJIMA HIDESUMI
IPC分类号： F01D21/18 , F01D17/20 , F16K31/02 , F16K31/06

7. 发明专利

JPS57210106A CONTROLLER FOR TURBINE 失效
公开(公告)号：JPS57210106A
公开(公告)日：1982-12-23
申请号：JP9225981
申请日：1981-06-17
申请人： HITACHI LTD
发明人： IIJIMA TADAHIKO , HONDA NAGANOBU , KUWAJIMA HIDESUMI
IPC分类号： F01D17/20 , F01D19/00 , F01D25/12
摘要： PURPOSE:To prevent abnormal heating from being caused by windage loss in a thermal power plant with a turbine by-pass line, by detecting the closed state of a ventilator valve at the time of joint operation after the starting of a turbine to forcedly set a regulating valve at a degree of opening not lower than a prescribed level, at the initial stage of the opening of the valve. CONSTITUTION:Steam generated by a boiler 1 flows into a high-pressure turbine 3 through a regulating valve 2 and performs work. The steam is thereafter supplied to a medium-pressure turbine 6 and a low-pressure turbine 7 through a reheater 4 and an intercept valve 5. At the time of shifting from the turbine starting to initial loaded operation, a steam flow rate signal 16 is processed through a regulating valve flow rate section 17 and an intercept valve flow rate section 18 to control the regulating valve 2 and the intercept valve 5. When a contact 20 is turned on by the closure of a ventilator valve 12, a minimum regulating valve opening degree bias 21 is applied to a higher level selection circuit 19 to open the regulating valve 2 stepwise and keep it at the minimum degree of opneing until the output of the regulating valve flow rate section 17 becomes higher than the bias.

8. 发明专利

JPS5572608A DRIVING PROCESS OF CROSSSCOMPOUND TURBINE BYPATH SYSTEM AND ITS INSTALLATION 失效
公开(公告)号：JPS5572608A
公开(公告)日：1980-05-31
申请号：JP14654478
申请日：1978-11-29
申请人： HITACHI LTD
发明人： NINOMIYA SATOSHI , YAMAJI YASUHIRO , KUNO KATSUKUNI , ARIE KIYOUSUKE , KASHIWARA KATSUTO , KUWAJIMA HIDESUMI
IPC分类号： F01D19/00 , F01D13/00 , F01D21/00 , F01K7/22 , F01K13/02
摘要： PURPOSE:To insure velocity control of turbine by providing turbine bypass system which synchronize both generators by means of giving possibility to drive both turbines in even speed at starting time of turbine while working in turbine-bypass- driving. CONSTITUTION:At the time of starting turbine for motion, let flow steam into high pressure turbine 5 of primany turbine 3 and to medium pressure turbine 6 of secondary turbine 4. Exhaust steam from high pressure turbine 5 is introduced into condenser 11 which is low pressure section, bypassing secondary turbine 4, and also introduce exhaust steam which passed through medium pressure turbine 6 into low pressure turbine 7 of primary turbine, and drive these turbines in even speed and to shynchronize.

9. 发明专利

JPH0518209A MEASURING DEVICE OF STEAM TURBINE PACKING GAP 失效
公开(公告)号：JPH0518209A
公开(公告)日：1993-01-26
申请号：JP16668091
申请日：1991-07-08
申请人： HITACHI LTD
发明人： GOTO MICHIHIRO , IWASE HIROO , KUWAJIMA HIDESUMI
IPC分类号： F01D25/00
摘要： PURPOSE:To eliminate dispersion of the results of human measuring, and improve work efficiency by inputting in form of an image the thickness of a molded part whose gap is measured calculating the thickness of the part thereof, by means of a presonal computer and judging whether the gap is a proper value or not. CONSTITUTION:A lead wire 8 sandwiched between a packing and a steam turbine rotor is brought in pressure-contact and molded. After that, the steam turbine rotor is hung up, and the lead wire 8 is taken out. The lead wire 8 is put on an image scanner 4, and the image of the lead wire 8 is inputted by the image scanner 4. The image is transfered to a personal computer 7 through a telecommunication line 5. Calculation process of the input image thereof is carried out by the personal computer 7, and the calculated value is presented as a practically measured value. The design value of a packing gap is inputted into the personal computer 7 beforehand, and the value is compared with the practically measured value, so that it is judged whether the practically measured gap is suitable or not, and secular change is suitable or not.

10. 发明专利

JPH0128202B2 失效
公开(公告)号：JPH0128202B2
公开(公告)日：1989-06-01
申请号：JP9225981
申请日：1981-06-17
申请人： HITACHI LTD
发明人： IIJIMA TADAHIKO , PPONDA NAGANOBU , KUWAJIMA HIDESUMI
IPC分类号： F01D17/20 , F01D19/00 , F01D25/12

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