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  1. Mechanic77

    Sealing a rectangular hole on a cylinder

    Hi all, I'm a Mechanical design engineer, new to design for sealing. I was given a task at my workplace, to design a plastic cylinder (made of ABS+PC) with a rectangular hole (for a lens made of HDPE). The hole for the lens should be sealed to the level of IPx5, without the use of...
  2. Mechanic77

    Isolating a screw which fails under ESD test

    Thanks! I'll try that. Best regards.
  3. Mechanic77

    Isolating a screw which fails under ESD test

    Hello all, We are having problems with a carbon-steel M3x16 self-tapping screw, which fails under voltage pulse test (25 kilo-Volts). It is a self tapping screw for plastics, and when under test, voltage passes through it into the system. I'm looking for a solution, in the form of an isolated...
  4. Mechanic77

    Water flow system - Design and Optimization

    The system is not yest designed, so I don't have the exact distances, but let's assume the distance between the pump outlet and the junction is a few meters. about 2 to 3 meters (horizontal flow at the same height) How does it affect the pressure right at the junction, with relation to the...
  5. Mechanic77

    Water flow system - Design and Optimization

    Essentially nothing between the points? what about the junction in between them? 3 points: 1st - right after the pump 2nd - right at the junction 3rd - after the junction The volume flow after the junction decreases. This means the velocity decreases as well. from Bernoulli's conservation...
  6. Mechanic77

    Water flow system - Design and Optimization

    Hi, First, thanks for your reply. Second, I can assure you that this is not a homework problem, but a real system which is part of a product we are trying to design. I am just trying to understand how to apply the rules and use the equations I learned long time ago. Third, Of course the...
  7. Mechanic77

    Water flow system - Design and Optimization

    Hello all, I'm a Mechanical engineer with no prior experience in designing flow systems. I'm struggling with a hydraulic system that I have to design. the number of unknowns is large. but maybe by dividing the system to small sections, a solution can be found. I attached a schematic drawing...

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