Hello, I apologize if this has been discussed in the past but my searches did not turn up anything.
I am running a set of transient thermal studies, and I would like Study 2 to use the temp profile results from Study 1 etc.
I see the check box for "Initial Temperature from thermal study' box...
I'm designing a custom motor for an industrial grinder.
This is a brushless servo motor intended to replace a synchronous AC motor.
Due to mounting constraints, I would like to install the cooling fan on the non-drive end of the motor shaft. All my previous experience is defense products in...
I'm using three straight spur gears to move a gearbox away from a pivot. This is in a low speed lift application, and the gearbox OD is larger than the allowable pivot diameter. It basically just flips a [heavy] panel 180°.
Backlash is not critical as it moves from stop-to-stop, but I am a...
I have a part that was made using lofts, the surface is a shallow complex curve. This part was provided to me as a "split" type feature and I do not have the curves that generated the original lofts.
I found that I need a little more material in the middle of the part. Basically what I want to...
I'm trying to estimate the transient heating of brushless DC motor stator. (run it for 90 seconds, how hot will it get).
I was going to assume the heat is generated in the windings (copper) and is transmitted by conduction to the laminations (steel) then into the stator housing (aluminum).
I...
My (new) Machine:
Win 7
SW Office Premium 2010 x64 Edition
SP 4.0
I just installed Simulation last night to double check some heat-sink calculations I had done.
I had previously been using a different machine running SW 2009 and Cosmos without issue, so I figured this new machine would be a...
I have designed an air-cooled motor housing equipped with cooling fins. Due to the short time available from concept to prototype, I did very brief analysis before choosing the fin height, width, and length. I chose these to be quite conservative based on the amount of heat loss expected from...
I'm having a problem coupling a ball-screw actuator to a gearbox.
Attached is an exploded view of the assembly.
Note that the Worm Drive Gearbox is provided with a hollow output bore, the Custom Machined Shaft has a keyway and key on it to engage the hollow output bore.
The key feature here is...
We currently manufacture a system that uses a shaft-brake to fix the rotation of a gear-box drive train.
The output of the gear-box is a hollow keyed shaft. I have designed a 25mm shaft to be made from 17-4 H1150 to pass through the hollow shaft. One end of the 25mm shaft is the output, the...
Hello, this question is related to my other post regarding idler gear mounting.
Design Background:
I have designed a pinion-idler train housing that mounts to a customer-supplied driven gear housing. My idler gear sticks part way out of my housing in order to accomplish this. All the gears in...
Hello,
Im designing a motor/gearbox that mounts to a (customer-supplied) linear actuator via a gear train.
Design Background:
Basically my gearbox has a pinion gear mounted to the output shaft, and in order to interface with the linear actuator, we include an idler gear (they call it a...
I was looking over some gear boxes for a design and saw that one of them offered a splined output shaft. I am mounting a spur gear directly to the output shaft of the gearbox and this brought up several questions:
1. The spline looks convenient because it is smaller radially than a shaft and...
Ok, I have designed an electric motor housing to operate with forced cooling. For demonstration purposes, our customer would like to operate the motor without the cooling system.
The cooling system consists of fans and shrouds to duct the cooling air over the fins on the housing.
I need to...
I have a 45mm ball bearing shrink fitting onto a 303 shaft.
The ball bearing has an ID of 45mm at P6 tolerance.
The shaft has an OD tolerance of k5 as recommended by the bearing manufacturer (SKF).
This makes for an interference of:
maximum = 0.013mm
minimum = 0.002mm
How can I estimate the...
I had asked a question about experimentally determining heat transfer coefficients in a motor housing earlier and this is a related project. I need to provide cooling to a motor dissipating ~200+W (could be 2x that number, I'm not sure yet).
I had originally designed the motor housing with...
First a little background:
I designed a billet aluminum forced-air cooled brushless permanent magnet electric motor housing (finned) and I also designed a sheet metal shroud to direct cooling air around the motor housing. I did hand calculations to verify that it had sufficient cooling...
I'm mocking up a linear rail that is part of a "lift" system.
I would like to use the type of linear rail Pacific Bearing sells that is self lubricating and suitable for "harsh environments" as this system will be used outdoors.
The linear rail slider itself is "pulled and pushed" by a...
Hello,
I'm working on a design that uses a worm-type gear reduction unit. The output "shaft" of the gear reducer is in fact a 25mm hollow shaft provided with am 8mm keyway.
I use a 25mm keyed shaft placed through the worm reducer hollow shaft to transmit the output torque.
A little about the...
I was evaluating supersonic nozzle performance when I had a question about the units for the Gas Constant "R".
The Imperial units are:
[ft-lbf]/[lbm-°R]
What gave me a bit of trouble when balancing the choked mass flow equation is the relationship bewteen lbf and lbm.
(I typed the equation...
