JPS5575630A - Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine - Google Patents

Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine

Info

Publication number
JPS5575630A
JPS5575630A JP14792878A JP14792878A JPS5575630A JP S5575630 A JPS5575630 A JP S5575630A JP 14792878 A JP14792878 A JP 14792878A JP 14792878 A JP14792878 A JP 14792878A JP S5575630 A JPS5575630 A JP S5575630A
Authority
JP
Japan
Prior art keywords
stay
damage
welded
ring
vane
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14792878A
Other languages
Japanese (ja)
Inventor
Hiroshi Kimoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14792878A priority Critical patent/JPS5575630A/en
Publication of JPS5575630A publication Critical patent/JPS5575630A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To continuously monitor the presence of damage of welded joint without stopping running, by providing the space at the welded joint of stay ring and stay vane of water wheel and detecting the change in gas state at the space.
CONSTITUTION: The stay ring 2 and the stay vane 3 of the water turbine are welded and jointed so that the unwelded part 9 sealed with the welded joints 8... isolated from external can be formed at the center to minimize the wasted molten metal in response to the distribution of tensile stress produced at running. Drill holes are made leading to the unwelded part 9 with the vane 3 and the ring 2 has the detection hole 12, through which the pressure and moisture inspection sensor 13 is connected to detect the gas condition in the unwelded part 9 dut to water leakage by the damage of the welded parts 8... to the space formed with the unwelded part 9. Thus, without interrupting running, the presence of the damage production of the welded joints can continuously be monitored.
COPYRIGHT: (C)1980,JPO&Japio
JP14792878A 1978-12-01 1978-12-01 Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine Pending JPS5575630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14792878A JPS5575630A (en) 1978-12-01 1978-12-01 Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14792878A JPS5575630A (en) 1978-12-01 1978-12-01 Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine

Publications (1)

Publication Number Publication Date
JPS5575630A true JPS5575630A (en) 1980-06-07

Family

ID=15441239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14792878A Pending JPS5575630A (en) 1978-12-01 1978-12-01 Monitor method for damage to welded joint of stay ring and stay vane of hydraulic machine

Country Status (1)

Country Link
JP (1) JPS5575630A (en)

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