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

JP2000328904A STEAM TURBINE WHEEL CHAMBER 失效
公开(公告)号：JP2000328904A
公开(公告)日：2000-11-28
申请号：JP13664399
申请日：1999-05-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： HAMAGAMI YOSHIYUKI , TAKITA KATSUHIKO , YOKOTA HIROSHI
IPC分类号： F01D25/12 , F01D25/26
摘要： PROBLEM TO BE SOLVED: To make a difference in the temperature of an upper casing and a lower casing small by providing a cooled air pipe that communicates with a cooled air supply system provided outside and opens to the upper casing. SOLUTION: A cooled air pipe 20 communicates with a cooled air supply system 22, a headstream, provided outside of a steam turbine. Further, it communicates with an upper casing 1 via a valve 21a disposed in the course of the pipe and opens in the upper casing 1 through its inner wall surface. The valve 21a is opened immediately after parallel-off upon the stop of the steam turbine, and cooled air is introduced from the cooled air supply system 22 through the cooled air pipe 20 and supplied to the upper casing 1 to cool it forcibly. Consequently, the temperature of the upper casing 1 is reduced, effect of natural flow from a lower casing 2 can be reduced, and temperature difference between the upper casing 1 and the lower casing 2 is reduced. Therefore, a difference in axial extension of the upper casing 1 and the lower casing 2 is made small, interference between a static portion and a rotating portion is prevented, eliminating the need to stop the operation of the forced cooling, and thus fuel cost can be saved significantly.

2. 发明专利

JPH0791201A REHEAT STEAM TURBINE 失效
公开(公告)号：JPH0791201A
公开(公告)日：1995-04-04
申请号：JP26298093
申请日：1993-09-27
申请人： MITSUBISHI HEAVY IND LTD
发明人： YOKOTA HIROSHI
IPC分类号： F01D3/04 , F01D5/06 , F01K7/22
摘要： PURPOSE:To reduce the entire size of a turbine by setting the diameter of the rotor of a medium pressure dummy part of a high to medium pressure rotor smaller than that of a medium pressure stage reaction vane line while maintaining thrust balance. CONSTITUTION:The diameter of the rotor 1b of the intermediate pressure dummy part of a high to intermediate pressure rotor 1 is almost the same as that of the rotor 1a of the high pressure dummy part in a reaction type reheat steam turbine having a high to medium pressure stage, while the rotor of a low pressure dummy part is formed into two stages, an upstream stage 1c1 and a downstream stage 1c2. The diameter of the upstream stage 1c1 of the rotor of the low pressure dummy part is almost the same as that of the rotor 1b of the medium pressure dummy part, while the diameter of the downstream stage 1c2 of the rotor of the low pressure dummy part is almost the same as the average diameter of the reaction vane line 43 of the medium pressure stage, and a thrust balance tube 61 is passed between the upstream stage and the downstream stage to apply medium pressure inlet pressure thereto.

3. 发明专利

JPH10245658A HIGH CR PRECISION CASTING MATERIAL AND TURBINE BLADE 失效
公开(公告)号：JPH10245658A
公开(公告)日：1998-09-14
申请号：JP5042897
申请日：1997-03-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJITA AKIJI , KAMATA MASATOMO , YOKOTA HIROSHI , TSUCHIYA MITSUYOSHI , TANAKA YOSHINORI
IPC分类号： C22C38/22 , C22C38/00 , C22C38/30 , C22C38/32 , C22C38/52 , C22C38/54 , F01D5/14 , F01D5/18 , F01D5/22 , F01D5/28 , F02C7/00
摘要： PROBLEM TO BE SOLVED: To provide a turbine blade high in reliability and having a lightened shrouded part by using a steel in which the contents of C, Si, Mn, Cr, Ni, V, Nb, N, Mo, W and Co are specified and executing precision casting. SOLUTION: The compsn. of a casting material is composed of, by weight, 0.08 to 0.14% C, 0.1 to 0.3% Si, 0.01 to 1% Mn, 8.5 to

4. 发明专利

JPS60174406A PROTECTIVE DEVICE FOR REHEATER 失效
公开(公告)号：JPS60174406A
公开(公告)日：1985-09-07
申请号：JP2870984
申请日：1984-02-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： NAKAMURA NAOTOMI , YOKOTA HIROSHI
IPC分类号： F22G5/00

5. 发明专利

JPS6069212A MANUFACTURE OF NOZZLE BOX FOR STEAM TURBINE 失效
公开(公告)号：JPS6069212A
公开(公告)日：1985-04-19
申请号：JP17652083
申请日：1983-09-26
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOKUBU TAKATOMO , YOKOTA HIROSHI
IPC分类号： F01D9/02 , F01D9/04
摘要： PURPOSE:To improve the safety for creep and fatigue destruction by a method wherein a nozzle box is divided into plural parts, and each part is manufactured by forging, then assembled by welding. CONSTITUTION:A nozzle box 100 is divided into an upper part 101 and a lower part 102 in circumferential direction, each part is manufactured by forging, then assembled into an integral structure by a welding 111. For each divided part manufactured by said process, the forging having the high-temperature strength and high reliablity can be selected. Therefore, the safety for creep and fatigue destruction can be improved.

6. 发明专利

JPH0315605A STEAM TURBINE 失效
公开(公告)号：JPH0315605A
公开(公告)日：1991-01-24
申请号：JP14834089
申请日：1989-06-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUJIKAWA TAKUJI , YOKOTA HIROSHI
IPC分类号： F01D11/08
摘要： PURPOSE:To enlarge a clearance in the inoperative state of a steam turbine having a movable blade disposed in a rotor and a stationary blade disposed in a blade ring while reduce the clearance in the operative state thereof so as to enhance efficiency by making the blade ring of a material having a thermal expansion coefficient lower than those of other component parts. CONSTITUTION:In a steam turbine with a movable blade 2 embedded in a rotor 1 serving as a rotary unit while a stationary blade 4 embedded in a blade ring 3 serving as a stationary unit, the rotor 1, movable blade 2 and stationary blade 4 are made of a material having a high thermal expansion coefficient such as austenite and refractive alloy, while the blade ring 3 is made of a material having a relatively low thermal expansion coefficient such as chrome steel 12. Therefore, using a difference in thermal expansion due to a change in temperature, a clearance can be enlarged in the inoperative state of the steam turbine while the clearance can be reduced in the operative state thereof.

7. 发明专利

JPS62284905A STRUCTURE OF STEAM TURBINE 失效
公开(公告)号：JPS62284905A
公开(公告)日：1987-12-10
申请号：JP12585386
申请日：1986-06-02
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOKUBU TAKATOMO , HAMAGAMI YOSHIYUKI , TAKIGAWA TORU , KISHIMOTO MASARU , YOKOTA HIROSHI
IPC分类号： F01D3/00 , F01D9/00
摘要： PURPOSE:To eliminate a middle pressure inner casing, to simplify structure, and to reduce the size of a steam turbine, by a method wherein an annular partition plate is positioned between a high pressure and middle pressure integral one-piece dummy ring and an outer casing, the outer peripheral part of the annular partition plate is inserted into the groove of an outer casing, and the inner peripheral part thereof is forced into contact with the outer peripheral surface of the integral one-piece dummy ring. CONSTITUTION:High pressure steam 100 is first introduced through an inlet part 11 of an outer casing 10, and after it flows through a nozzle chamber 31 by means of an inlet part 21 of an inner casing 20, it is injected through a nozzle block 32. The high pressure steam then flows through a steam chamber 110 into a high pressure stage, and after the high pressure steam producing reheat steam 200 flows through an inlet part 12 into a steam chamber 210 of a middle pressure turbine, it flows through a middle pressure stage 43 to exert a rotation force on a rotor 40. This constitution causes elimination of a conventional middle pressure inner casing. A 2-split annular partition plate 56 is positioned between a high pressure and middle pressure integral one-piece dummy ring 54 and an outer casing 10. An outer peripheral part 56a of the partition plate 56 is inserted into a recessed part 15 formed in an annular shape in the outer casing 10, and an inner peripheral part 56b of the partition plate 56 is forced into contact with the outer peripheral surface of the integral one-piece dummy ring 54.

8. 发明专利

JPS62168901A REHEAT STEAM TURBINE 失效
公开(公告)号：JPS62168901A
公开(公告)日：1987-07-25
申请号：JP808486
申请日：1986-01-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOKUBU TAKATOMO , YOKOTA HIROSHI
IPC分类号： F01D3/04 , F01D3/00
摘要： PURPOSE:To achieve the miniaturization of a device by providing integrally a high-pressure dummy ring and an intermediate-pressure dummy ring between a high-pressure part and an intermediate-pressure part. CONSTITUTION:Between a high- and intermediate-pressure inner casing 20 and a high- and intermediate-pressure rotor 40, a high-pressure part consisting of a nozzle chamber 31, a nozzle block 32, and a rotor speed regulating stage 41, and an intermediate-pressure part consisting of an intermediate-pressure blade ring 54 and intermediate-pressure stages 43 are provided. Between the high-pressure part and the intermediate-pressure part, a high- and intermediate- pressure solid dummy ring 60 in which a high-pressure dummy ring and an intermediate-pressure dummy ring are integrated is provided. Thus, the pressure resisting strength can be enhanced, and the device can be miniaturized.

9. 发明专利

JPS6116213A Bolt tightening structure for steam turbine chamber 失效
标题翻译：用于蒸汽涡轮室的螺栓紧固结构
公开(公告)号：JPS6116213A
公开(公告)日：1986-01-24
申请号：JP13726884
申请日：1984-07-04
申请人： Mitsubishi Heavy Ind Ltd
发明人： FUJIKAWA TAKUJI , YOKOTA HIROSHI
IPC分类号： F01D25/28 , F01D25/24
CPC分类号： B23P19/068 , F01D25/243
摘要： PURPOSE:To prevent tensile stress, produced due to a thermal elongation difference to be exerted on a bolt, by a method wherein a sleeve washer, located between washers, is mounted to a bolt, a sleeve heat insulating material is situated between the bolt and the sleeve washer, and the sleeve washer is reduced in temperature. CONSTITUTION:A bolt 3 is filled in a lower member 1, and meanwhile a through-hole 10 for the bolt 3 is formed in an upper member 2. The upper member 2 is tightened against the bolt 3 through a washer 4, a sleeve washer 5, and a washer 7 by means of a box nut 8. Further, a sleeve heat insulating material 6 is located between the bolt 3 and the sleeve washer 5. Moreover, the outer surface of each of the upper member 2 and the box nut 8 is covered with a heat insulating member 9. This decreases the temperature of the sleeve washer 5, resulting in the possibility to cause excessive tensile stress, produced due to a difference in thermal elongation, between the bolt 3 and the substances 1 and 2 to be tightened, from being exerted on the bolt 3 and prevent break of the bolt 3.
摘要翻译：目的：为了防止由于热延伸差异而产生的拉伸应力施加在螺栓上，通过将位于垫圈之间的套筒垫圈安装在螺栓上的方法，套筒绝热材料位于螺栓和套筒垫圈和套筒垫圈的温度降低。构成：在下部构件1中填充螺栓3，同时在上部构件2中形成用于螺栓3的通孔10.上部构件2通过垫圈4，套筒垫圈另外，套筒隔热材料6位于螺栓3和套筒垫圈5之间。此外，上部构件2和箱形螺母的外表面 8被绝热构件9覆盖。这降低了套筒垫圈5的温度，导致由螺栓3和物质1和2之间的热伸长差引起的过大的拉伸应力的可能性到被拧紧，从而施加在螺栓3上并防止螺栓3断裂。

10. 发明专利

JPS60228703A STEAM TURBINE 失效
公开(公告)号：JPS60228703A
公开(公告)日：1985-11-14
申请号：JP8195484
申请日：1984-04-25
申请人： MITSUBISHI HEAVY IND LTD
发明人： KOKUBU TAKATOMO , TAKITA KATSUHIKO , HAMAGAMI YOSHIYUKI , YOKOTA HIROSHI , HIZUME AKIO
IPC分类号： F01D1/04 , F01D5/06 , F01D25/26
摘要： PURPOSE:To prevent deformation of an inner casing, by introducing steam injected from a nozzle block to a high pressure stage side without having the steam strike against an inner wall surface of the inner casing. CONSTITUTION:A blade ring 161 on a high pressure stage provided on a steam outlet side of a nozzle block 32 is extended to the upper portion of a moving blade 42 on a speed control stage so as to cover an inner wall surface of an inner casing 21. Steam injected from the nozzle block 32 passes through the moving blade 42, and then flows to a stationary blade 62 and a moving blade 43 on the high pressure stage side without striking against the inner wall surface of the inner casing 21. Thus, heat transfer coefficient to the inner casing 21 is reduced to prevent heat deformation of the inner casing 21.

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