I worked in the electronics cooling market for Thermacore Inc. for 18 years building all kinds of heat pipes, vapor chambers, thermosiphons, air to air and liquid to air exchangers, pumped liquid cooling, heat spreders/cold plates and loop heat pipes for high & low power components. This is an example of one of my ideas and was not a product of Thermacore. If you have any questions about electronics cooling ask me here or at email@example.com
The idea is basically a custom made pump housing with impeller and magnets on the underside of the impeller. Then a normal 120mm computer fan also with magnets mounted on top of the blade assembly. The pump assembly is mounted on a fan guard and then screwed onto the fan. So when the fan is running then so is the pump. So now you can run your liquid cooling systems fan and pump using only one motor plus make the whole thing from easy to find parts and if you are a DIY then you most likely have these parts. The only thing I needed to get was the magnets which may be about $2 dollars worth. I did test this unit based on test data from a high performance liquid cooling system for a high end high priced gaming computer. The pump & fan combo pictured was tested with a water block and exchanger which is no longer attatched.
If my instructions are not complete enough feel free to e-mail me with any questions. Test results are on the following instruction pages. Thanks for looking and have fun. I do have to say though buld it at your own risk I cannot be responsible for damage to yourself or parts you use. I have included a rar. file with the same instructions and more pictures.