Maximum ultrasonic performance requires the most efficient transfer of ultrasonic vibrations from the ultrasonic transducers to the liquid in the process tank. This is generally accomplished by applying ultrasonic transducers directly to the exterior surfaces of a tank containing the process liquid. Transducer attachment techniques favor attachment to metals like stainless steel. What if the chemistry to be used …
Earlier blogs have shown how difficult and deceptive it can be to relate energy consumed to work delivered. In this blog I would like to offer an example of this difficulty as it relates directly to ultrasonic transducers and cleaning. First of all, most (if not all) ultrasonic devices used for cleaning utilize a number …
Most surfaces that we encounter in industrial cleaning are relatively smooth and contiguous. We have talked earlier about the difficulties of cleaning blind holes, threads, capillary spaces and other challenging configurations. The one surface we haven’t yet explored is that of a material that is itself porous. Sintered materials including metal, ceramic, glass, plastic and …
Electricity is not something we give considerable attention to in our daily lives. At home or at work (or wherever) there are electrical outlets. We simply plug devices into the outlets and the devices light up, heat, rotate, vibrate, charge or do whatever they’re supposed to do. What’s behind the outlet, generally, is of little concern …
Three phase power is commonly used where large amounts of electrical power are required. Examples are power transmission lines and large industrial machines which require considerable power. What is three phase power anyway? Let’s start by thinking of a two wire transmission line as shown below connecting the source of alternating current power to the …
Most of us are aware that the power we get from the power line coming into our house or factory comes as alternating current. Basically, the voltage on the “hot” wire as referenced to ground varies, going negative then positive 60 times each second (60 Hz). The benefit and compelling argument for using alternating current …
As discussed in a previous blog, one problem with watts is that watts do not equal energy. Let’s carry that thought a little further again using the vehicle analogy I put forth in the initial blog of this series. In the ultrasonic world it is common to associate the effectiveness of an ultrasonic cleaning tank its …
Some time ago I wrote a paper entitled “What is a Watt.” Although this paper seems lost in history (I can not find a copy of it), I can remember the point that I was trying to make when I wrote it. In essence, it made the case that a watt is only an instantaneous …
I usually try to make sure I’ve done my research prior to posting a blog. As I was thinking about the post about the ceramic ring test, however, it occurred to me that there are a couple of variables that I had not previously considered – – the pencil and the means of applying the markings to the …
Other than to say that there is no perfect, infallible way, the blog has not addressed assessing ultrasonic performance. In an earlier blog, I did suggest that any of many methods are appropriate to compare ultrasonic performance of an ultrasonic system from day to day but that no further inference should be made. One test that’s …
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