I'm building a test jig that needs an air pressure regulator with a very large turn-down:
Inlet pressure range = 80 to 120 psig
Discharge pressure range = 1 to 130 inches of water (0.036 to 4.7 psig)
Discharge flow rate demand = 0 to 150 CFM, with the maximum d(flow)/dt = 800 CFM/s
I've sent...
I have a 5/8" orifice solenoid valve controlling room air with a differential pressure varying between 0.1 psi and 5.0 psi. Attached to this post is a sketch of the valve: Open, Closed, section Closed, and detail of o-ring Closed.
Even though the pressures are very low and the resultant force...
My company is designing a production line for a new product. Two of the parts are aluminum near-mirror images of each other, and were to be assembled with adhesive. The customer change-ordered the fabrication to be welded instead.
Sketches of one of the two parts is shown below. The...
I'm winding a set of coils from 37 AWG magnet wire with a single-thickness polyurethane/nylon combination insulation (NEMA MW29-C) and a bonding overcoat of Polyvinyl Butyral.
The bond overcoat can be made liquid with either Isopropyl Alcohol or heat. If heating, then a temperature of 110 C to...
I have a 22 gram mass steel actuator hollow rod that slides on a rail. At the end-point of its travel, it collides with a solidly mounted steel plate. Just before the collision, the actuator rod is travelling at between 2.3 to 3.3 meters/sec, depending on other factors, so it posesses kinetic...
I've started a small design company, and I have 3 corrosion questions on my first product.
It is a mechanism about 1/2 the volume of a can of Coke. The parts are made of the following materials:
1) 260 Brass
2) 410 Stainless, powdered metal, 85% density
3) several different polymers
4)...
I'm designing several small parts in 410 or 416 stainless, to be manufactured in powdered metal. It is common to specify the density of a part to be 80% to 85% of theoretical (solid) density. Higher densities, essentially to 100%, are achievable, but all these are much higher cost: initial...
I need to improve the varnish impregnation of a coil wound onto a bobbin (Ticona Vectra C130) with 30 layers of AWG 40 single-build insulation, around a solid core 1.5 inches long and 0.4 inches in diameter.
I'd like to have the varnishing process be scalable to a desktop-sized tank...
Engineers,
I'm building a set of small (12mm stroke, 20mm diameter) linear actuators for an after-hours toy. This is only my 2nd magnetics project, so I need to ask for your tolerance.
The DC actuators are based on Lorentz Forces with a small spring return. The coil is wrapped on a steel...
Engineers,
I need to design several coils for electromagnetic actuators for small nitrogen valves. One is a iron-core electromagnet, another is an air coil for a moving-magnet style "voice coil motor". Both are two-position, bang-bang actuators operating on DC current (100mA @ 10VDC).
The...
