专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH07229403A TIP CONNECTING DEVICE FOR MOVING BLADE OF TURBINE 失效
公开(公告)号：JPH07229403A
公开(公告)日：1995-08-29
申请号：JP2232494
申请日：1994-02-21
申请人： HITACHI LTD
发明人： YAMAZAKI YOSHIAKI , TAKI TOMOYUKI , SATO TAKESHI
IPC分类号： F01D5/22 , F01D11/02
摘要： PURPOSE:To prevent a large vibration caused by that moving blades of a ring blade line planted on the disc of the rotor of a steam turbine lose the mutual support by the contact with the side surfaces of the adjacent moving blades by the centrifugal force or thermal expansion at the operation of the turbine. CONSTITUTION:A plurality of circumferential dovetail grooves 5 are provided on the outer circumferential surface of an integral shroud 4, a seal fin 6 divided into a plurality of small pieces is inserted to the groove part to form a ring seal fin, and the contact part of the seal fin 6 and the contact part of the shroud 4 are set in mutually different circumferential positions. Thus, the adjacent moving blades are mutually connected through the seal fin 6 at the operation of a turbine to provide damping effect of vibration.

2. 发明专利

JPS54135664A DENITRATING METHOD BY REDUCTION WITH AMMONIA 失效
公开(公告)号：JPS54135664A
公开(公告)日：1979-10-22
申请号：JP4313678
申请日：1978-04-14
申请人： HITACHI LTD
发明人： AKIMOTO HIDETOSHI , AZUHATA SHIGERU , TAKAHASHI SADAO , TAKI TOMOYUKI , HISHINUMA TAKAO , ISHIBASHI YOUJI
IPC分类号： B01D53/94 , B01D53/34
摘要： PURPOSE:To restrain the effluent of NH3, to increase denitration ratio, and to reduce equipment cost, by, in denitration of exhaust gas, addn. of NH3 and H2O2 to the exhaust gas which is at a specific temp. range, then by passing the exhaust gas additionally through a layer of metallic oxide catalyst. CONSTITUTION:To exhaust gas 12 (at a temp. not lower than 400 deg.C) discharged from a turbine are added NH3 14 (in a mol ratio 0.5-3 to NOx) from nozzles 7, and H2O2 15 (in a mol ratio 0.3-1 to NH3) from nozzles 8 in order to decompose NOx contained in the exhaust gas in gas phase. By passing the exhaust gas through a conventional metallic oxide catalyst layer 9 (at a temp. 600-250 deg.C), residual NOx is reduced catalytically with unreacted NH3 so as to complete the denitration. In that case, because nearly all NO has been oxidized to NO2, and the rate of reaction of NO2 with NH3 is larger than that of NO, the catalyst layer of smaller volume is sufficient to complete the reaction. In addn., combination of gas phase reduction with N2O2 and NH3 and catalytic reduction shows synergetic effect, restraining effluent of NH3 and increasing denitration ratio.

3. 发明专利

JPS5446172A REDUCING METHOD FOR NITROGEN OXIDES IN COMBUSTION GAS 失效
公开(公告)号：JPS5446172A
公开(公告)日：1979-04-11
申请号：JP11266177
申请日：1977-09-21
申请人： HITACHI LTD
发明人： AZUHATA SHIGERU , TAKI TOMOYUKI , TAKAHASHI SADAO , AKIMOTO HIDETOSHI , HISHINUMA TAKAO , OOSHIMA RIYOUICHIROU
IPC分类号： B01D53/56 , B01D53/34 , B01J12/00 , C01B21/02
摘要： PURPOSE:To reduce NOx noncatalytically so as to make it harmless, by injecting alcohol or aldehyde in a mol ratio not less than specific ratio to NOx into NOx- contg. gas at a low temp. region in the presence of O2. CONSTITUTION:A reducing agent selected from the group of alcohols and aldehydes is added to NOx-contg. gas at a temp. not lower than 200 deg.C, pref. from 400 to 600 deg.C in the presence of 0.1-20% O2 in order to reduce NOx noncatalytically in gas phase. A cpd., which is selected from the group of alcohols and aldehydes, not less than 3mols to 1mol NOx is injected. CH3OH, C2H5OH, i- or n-C3H7OH, i- or C4H9OH are used for the alcohols, and HCHO, CH3CHO for the aldehydes.

4. 发明专利

JPS536278A CATALYTIC REACTOR 失效
公开(公告)号：JPS536278A
公开(公告)日：1978-01-20
申请号：JP7988176
申请日：1976-07-07
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： MURAKAMI TADATAKA , ARASHI NORIO , AKATSU SHIGEYUKI , TAKI TOMOYUKI , MUKAI MASATO
IPC分类号： B01D53/94 , B01J8/00 , B01J8/02 , F23G7/07
摘要： PURPOSE:To prevent channeling of gas passing through catalyst layer by reversing the gas flow in a catalytic reactor in the time after the gas has passed through the inlet until it flows out of the outlet.

5. 发明专利

JPH0719004A AXIAL FLOW TURBINE AND STEP DEVICE FOR AXIAL FLOW TURBINE 失效
公开(公告)号：JPH0719004A
公开(公告)日：1995-01-20
申请号：JP16459293
申请日：1993-07-02
申请人： HITACHI LTD
发明人： YAMAZAKI YOSHIAKI , TAKI TOMOYUKI , KOZUKI TATSUO , SATO TAKESHI
IPC分类号： F01D1/04 , F01D5/06 , F01D5/14 , F01D9/02
摘要： PURPOSE:To rationalize three dimensional flow, and reduce fluid loss so as to exhibit high performance, even if a stationary blade and a moving blade form a step device arranged in an expansion flow passage. CONSTITUTION:The radial direction outer side tip of a stationary blade 1 is arranged slantly in the rotational direction of a turbine shaft, and also the axial direction clearance between the stationary blade 1 and the moving blade 2 is formed larger in radial outward direction than that in radial inward direction.

6. 发明专利

JPH03170043A METHOD FOR INSPECTING AND MONITORING CORROSION OF STEAM TURBINE BLADE 失效
公开(公告)号：JPH03170043A
公开(公告)日：1991-07-23
申请号：JP30769889
申请日：1989-11-29
申请人： HITACHI LTD
发明人： YASUGADAIRA NORIO , YAMAZAKI YOSHIAKI , TAKI TOMOYUKI , TSUBOUCHI KUNIYOSHI , SATO TAKESHI
IPC分类号： G01B11/30 , F01D5/00 , G01M99/00 , G01N21/84 , G01N29/22 , G01N29/44
摘要： PURPOSE:To monitor and analyze the life of the blade by providing a roughness detector, calculating the roughness parameter of the blade surface from roughness data and inputting it to an erosion quantity correlation data base, and evaluating variation in erosion quantity with the lapse of time. CONSTITUTION:A scan is made optionally in two axial directions, i.e. the axial direction X and radial direction Y of the roughness detector 13 and blade surface 12 and its scan control is performed by a driving unit 14 and an X-axis and Y-axis control unit 15 through a control cable 16. A CPU 22 has a blade surface roughness measurement processing part 23 and a three-dimensional graphic display processing part 24 which displays the roughness data corresponding to X-axial and Y-axial scanning positions. The roughness data obtained by the processing part 23 is transmitted to a roughness parameter calculation part 25 to calculate roughness parameters of mean roughness, maximum roughness, etc. The calculation results of the roughness parameters obtained by the processing part 25 are transferred to the erosion data base 27 and the correlation between the roughness parameters and erosion quantity is evaluated by a correlativity evaluation processing part 28 to recognize and evaluate a quantitative erosion damage quantity.

7. 发明专利

JPS63246637A APPARATUS FOR MONITORING EROSION OF TURBINE BLADE 失效
公开(公告)号：JPS63246637A
公开(公告)日：1988-10-13
申请号：JP7742687
申请日：1987-04-01
申请人： HITACHI LTD
发明人： YASUGADAIRA NORIO , TAKI TOMOYUKI , TSUBOUCHI KUNIYOSHI , SATO TAKESHI
IPC分类号： F01D5/00 , G01N17/00
摘要： PURPOSE:To perform monitoring with high accuracy without always using an expensive optical technique, by finally evaluating erosion quantity using an erosion quantity initial estimation device in such a state that the timewise change of erosion quantity becomes constant. CONSTITUTION:A non-contact type blade surface shape measuring means 20 utilizing laser beam is mounted on the stationary member of the low pressure part of a steam turbine and the surface profile of a blade in an initial state is preliminarily operated at a stationary time by an initial profile measuring operator 21. An erosion quantity after an operation elapse time DELTAT is operated by a blade surface erosion quantity evaluation operator 24. The estimated erosion quantity is corrected from the ratio of the timewise change quantity of the output Ec of an erosion quantity initial estimation device 27 to that of the output E of the blade surface erosion quantity evaluation operator 24. The measuring processing of the erosion quantity based on the detection values of these optical means is performed only for a time until reaching a steady region and, thereafter, final evaluation is performed using the operationally processed value of the erosion quantity initial estimation device 27. By this method, the erosion advance state of a turbine blade can be effectively monitored with high accuracy.

8. 发明专利

JPS5446171A REDUCING METHOD FOR NOX CONCENTRATION IN COMBUSTION GAS 失效
公开(公告)号：JPS5446171A
公开(公告)日：1979-04-11
申请号：JP11264777
申请日：1977-09-21
申请人： HITACHI LTD
发明人： AZUHATA SHIGERU , TAKI TOMOYUKI , TAKAHASHI SADAO , AKIMOTO HIDETOSHI , HISHINUMA TAKAO , UCHIYAMA YOSHIHIRO , OOSHIMA RIYOUICHIROU
IPC分类号： B01D53/56 , B01D53/34 , B01J12/00 , C01B21/02
摘要： PURPOSE:To increase denitration efficiency by injecting NH3 and aq. H2O2 soln. of low concn. into NOx-contg. gas. CONSTITUTION:Into NOx-contg. gas is injected spray of NH3 and aq. H2O2 soln. of concn. not higher than 30wt%, pref. not higher than 10wt%, or more pref. not higher than 3wt%. The lower the concn. of the aq. H2O2 soln. is, the less is the formation of NO2 because no local, high H2O2 concn. zone is formed. The formation of NO2 inhibits the denitration due to the reaction of NO with NH3. Addn. of H2O2 causes the noncatalytic denitration to processed even at a low temp. region, with increase in denitration efficiency for combustion gas.

9. 发明专利

JPS548215A REDUCTION OF CONCENTRATION OF NITROGEN OXIDE IN COMBUSTION GAS OF GAS TURBINE 失效
公开(公告)号：JPS548215A
公开(公告)日：1979-01-22
申请号：JP7325677
申请日：1977-06-22
申请人： HITACHI LTD
发明人： AZUHATA SHIGERU , TAKI TOMOYUKI , TAKAHASHI SADAO , AKIMOTO HIDETOSHI , HISHINUMA TAKAO , OOSHIMA RIYOUICHIROU
IPC分类号： F02C3/30 , F23C99/00 , F23R3/30
摘要： PURPOSE:To reduce the concentration of NOx in combustion gas of a gas turbine and prevent non-reacting NH3 from flowing out, by effectively using a reducing decomposition process of NOx by NH3 and N2O2.

10. 发明专利

JPH062503A MOISTURE SEPARATION STRUCTURE FOR STEAM TURBINE STATIONARY BLADE 失效
公开(公告)号：JPH062503A
公开(公告)日：1994-01-11
申请号：JP15778192
申请日：1992-06-17
申请人： HITACHI LTD
发明人： TAKI TOMOYUKI , YAMAZAKI YOSHIAKI , NAMURA KIYOSHI , SATO TAKESHI
IPC分类号： F01D9/02 , F01D9/04
摘要： PURPOSE:To pertinently prevent the occurrence of erosion on a moving blade by applying a recessed form of fillet weld to the connection of a stationary blade and a diaphragm outer wall for retaining the stationary blade in such a way as avoiding the formation of a projection, and forming a recessed groove along an area from the fillet weld at the leading end of the stationary blade to the downstream side of the diaphragm outer wall. CONSTITUTION:An axial flow fluid machine is constituted of a stationary blade 1 and a moving blade 2, and fillet weld 16 is applied to the connection of the stationary blade 1 and the outer wall of a diaphragm 3. In this case, the fillet weld 16 is applied in a recessed form around the stationary blade 1 in such a way as not projected from the outer wall surface of the diaphragm 3. In this case, moisture is introduced out to a low pressure section along a recessed groove 24 formed along an area from the fillet weld 16 at the trailing end of the stationary blade 1 to the downstream side of the outer wall of the diaphragm 3. Namely, moisture near the fillet weld 16 is arrested and introduced out without causing any drop in the strength of the stationary blade 1. According to this construction, an amount of water drops colliding with the tip of the moving blade 2 can be reduced, and erosion can be thereby prevented pertinently from occurring on the moving blade 2.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式