A method is required which can be used, after damage has occurred to diesel engines on ships or locomotives, for exami-nation, or preventative nondestructive testing of valves in the assembled condition, after the control mechanism has been removed.
This means that only the front of the valve shaft is accessible.
對去除控制機制以后的船或者機動車的柴油發(fā)動機出現(xiàn)損壞的情況，要求在裝配的情況下對閥門進行一種檢驗或者是預(yù)防性的無損檢測。
這就意味著只有閥門軸的前端面可以作為檢測面。
SOLUTION: 方案
It is proposed that the special probe K5KS1 be used in the direct coupling mode on the front of the valve shaft:
特殊的探頭K5KS1可用于和閥軸的前端面的直接耦合

The probe’s crystal element diameter is matched to the shaft’s diameter. The acoustically absorbent protection layer (coupling membrane) reduces coupling deviations caused by standard hard-faced probes.
探頭的晶片直徑和軸的端面相匹配，聲學(xué)吸收保護層（耦合膜）可以降低由于探頭硬接觸面引起的偏差。
Indications from the weld zone are evaluated which extend above the noise level caused by coarse grain structure for-mation.
超出由于粗晶粒結(jié)構(gòu)引起的噪聲的焊縫區(qū)域顯示進行評估
The complete weld area is covered by guiding the sound beam into the valve shafts.
調(diào)節(jié)進入閥軸的聲束覆蓋整個焊縫區(qū)域

Typical display indications:
典型的顯示

It is recommended that the test method be used due to its easy application and its clear indications in engine production and for input checks.
推薦的檢測應(yīng)用簡單并且能夠形成清晰的顯示

SUITABLE EQUIPMENT: 設(shè)備

Ultrasonic Flaw Detector:
超聲設(shè)備 USD 15X USM 22 USM 25
Probe: K5KS1
探頭