Hello all,
We've got an issue whereby a stainless steel pressure sensor housed in an aluminium or zinc enclosure and submerged in a static tank of tap water starts to drift (i.e. the pressure reading starts to continuously increase or decrease away from its nominal value). Other than a small...
Hi all,
The following mechanical drawing is for a pressure sensor and recommends a 19mm hole with a 20 degree phase for mounting. What does a 20 degree phase mean?
Thanks,
Amr
Hello all,
I'm trying to get hold of some clear plastic pipe of approximately 8" in diameter in order to build a test rig for some pipe inspection robots (straight sections, tees and 90 degree elbows). Unfortunately, the prices I've found online are very expensive. For example, usplastic.com...
Hello all,
I'm using ANSYS workbench 13 to model the fluid flow in a pipe with various obstacles in it in order to determine the forces generated on the obstacles by the fluid. However, I'm not sure how to create the geometry for this simulation. From the CFX tutorials, I can see that the...
Hello all,
I'm getting some inconsistent behaviour with Solidworks' Smart Fastener tool. Examine the following assembly:
The cube in the middle is just a simple cube with several Hole Wizard holes in it. These were created in one step by applying the hole properties to different sketch...
Hello all,
I'm making an animation of an assembly that is composed of several sub-assemblies in SW2009. In one of the sub-assemblies, I am trying to move some of its constituent parts and sub-assemblies so that I can make the animation. I have set the sub-assembly to be flexible and I can move...
Hello all,
I was wondering what mechanisms/actuators are out there that can generate strains of higher than 1 (i.e. the actuator can extend to at least twice its original size). I can only think of two mechanism for doing so: either a telescopic system, or the use of the scissor mechanism, like...
Hello all,
How do you calculate the torque produced by a turbine? If we consider the turbine shown below:
Assume that this turbine is working underwater, with a fluid speed of 2m/s and that the turbine itself is 10mm thick. In order to calculate the speed, I work out the time taken for the...
Hello all,
I have been looking at the websites of various simulation packages, such as the Solidworks Simulation features, ANSYS, COMSOL and LS-DYNA. Although these packages can simulate many different things, it wasn't clear whether these packages can simulate entire systems. All the examples...
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I am looking for a source of small, telescopic hydraulic cylinders. I'm looking for a cylinder with a retracted length of approximately 20mm and an extended length of approximately 90mm. The diameter of the main cylinder is roughly 15mm. I do not yet know the required working...
Hello all,
I am familiar with the method of calculating the required pressure in a hydraulic cylinder in order to generate a desired force: P = F/A, where A is the area of the piston. However, looking at cutaway drawings of telescopic cylinders shows that it is more complicated internally, with...
Hello all,
I am trying to apply a linear motor to the highlighted part in the image below:
As you can see, selecting the outside surface of the cylinder creates a linear motor which acts along the cylinder's axis. However, I need the motor to act in such a way that the cylinder is pushed...
Dear all,
I'm looking for a miniature (has to fit into an enclosure of size 90x35x15mm or 3.54x1.38x0.59in) vacuum pump that should generate a vacuum of 200mBar. The pump will eventually power a set of suction cups that allow a vessel travelling in a municipal water pipe to cling to the pipe...
Hello all,
I'm working on a project where I will be designing instrumentation that will live inside underground water pipes. I was wondering if anyone knew the typical sizes of such pipes, the types of junctions used, and typical pressures and flows inside them. Do these properties vary from...
Hello all,
I'm working on a project where I need to enclose some measuring instruments in a waterproof housing and mount that inside an operational straight water pipe, while trying to minimise any obstruction to the flow of water. Obviously, the frontal surface area and the shape of the...
