Me 430 Acordero Final Project PDF

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Summary

Rotary pump Detailed drawing of sub assemblies & explanations of each component. ...

Description

ME 430 Computer Aided Design

Mechanical & Industrial Engineering Department By: Alexander Cordero Instructor: Jaskirat Sodhi

ROTARY GEARED PUMP

Cad System Description

Since The first appearance of cad systems in 1957 this system has been a big improvement in the engineering industry. It increased the efficiency of engineers around the world making it practical and less time consuming. Before cad system where implemented in the engineering environment, engineers and others used to sit and draw by hand each design which took long hours of work, big areas of work, it used many expensive instruments and the person needed a certain level of skill at drawing to do this process. In this project I used two systems Solid Works & Creo Parametric. Solid Works Is cataloged as one of the best CAD systems due that it is used by millions of engineers around the world ., with many capabilities to design any easy or complex 3D model you desire. Solid Works capabilities and processes are easy to use due to the design the developers gave making it a high-performance system which is focused in the user friendly. Making Solid Works one of the best CAD system in the world. Moreover, Solid works is not just a space for design part of its futures include various types of studies, such as Thermo Analysis, Conductivity, Flow Systems, Stress distribution, etc. Creo Parametric its another huge figure in the CAD systems, Having in general same capabilities as Solid Works. Same as solid works Creo Parametric allows you to model any desired 3D model, from Simple components processes to complicated bodies assemblies. Creo also has various studies such as Thermo Analysis, Conductivity, Flow Systems, Stress distribution, etc, However the big difference comes from its interface Creo let you define your own parameters at the time to model, making it a little more difficult than Solid Works which it helps you pic some parameters making it more user friendly than Creo.

Geared Rotary pump.

This project present sixteen Different pieces such as : 1. Base: 2. Gasket: 3. Driving gear 4. Driven Gear 5. Body 6. Gear Bushing 7. 10-32 7/8 Hex Screw 8. 10-32 1-5/8 Slotted hex 9. Pulley 10. Al Key Woodruff 11. Cover 12. Dowel pin 13. Cover 14. Dowel Pin 15. 10-32 Nut 16. Headless set

Process and Modeling

Base

Starting with the pump Base The design present two main bodies attached together in which the assembly supports the system. Using the whole wizard tool I created the wholes where the Hex Screws and the driving and derived gear is placed.

Started creating the front body of the system extruding in the middle of the plane. This way I acquire symmetry which it helps me at the moment of adding cuts holes, etc.

Before We make the ellipsoid some filets are placed to add a smooth touch to our pump design. We add an ellipsoid sketch from the Front face of our previously created body.

At the end we add wholes with the magic hole tool for which our gear and screws will be placed To safe some time I used the symmetry to my advantage mirroring the holes in various

directions.

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Pulley The pulley prt for which the out motion of our pump happens. Our pulley motion is due to the rotation of the driven gear . it presents a key way in the middle in order to set motion at the time of rotation.

In order to generate this body, I used a feature called Revolve. Using simple linear dimensions, I created a 2D drawing which rotates 360 degrees to create the main body of this pulley.

With tool wizard I created a hole which then will be copy using the pattern tool. Also, my Hole wizard tool allows me to set a tread for my slotted screw, As always setting some fillets makes our part more practical. The end is adding the gap where our key is being placed.

Driving & Driven Gear For Our Gears we used two set of gears a driving and a driven ger for which our pump motion starts as fluid enters one side of the body my gears rotate generating our motion for the pulley to act. Driving gear . This is the smaller gear which absorbs the torque motion of flow , it is placed in the bottom part of our base. Driven gear . This gear is the biggest gear driving gear will rotate the proportionally using its rpm

motion due the longer tube to act on the pulley.

Design

Dort the design we use our previously created involute gear we define our parameters to get the for me desire. However in order to decrees friction we minimize the volume so we will have a better motion of our gears.

Body In this model it was implemented normal extrusion generation my ellipse body however in order to save some time part of my drawing included my hollow area where my gears will be acting. Using mirror and hole wizard the space for which my Hex gears are created. The entry of the fluid where added from a basic extrusion from my body plane. To end the tread and fillets where added.

Gland The Gland for the head, the two side

piece was created with two different extrudes first then second extrude for the cylinder part. At the end wholes here added with the hole wizard tool.

Cover This piece is the end part of our pump design to hold with screws our pump and containing any liquid to spill out. The cover face was created with the extrude tool, first the ellipse was created then the cap. At the end some fillets where added to add a smooth texture to our pump.

Gear

Bushing and Gland Bushing

We use this for our it faster than

piece to maintain the gears centered giving a better rotation system. To design I used the revolve feature at once, making creating a hole or extruding

Solid works Library parts used (general)

10-32 7/8 Hex Screw

10-32 1-5/8 Slotted hex

Dowel Al Key

10-32 Nut

Pin Woodruff

Assembly Prosses At the time of assembly, we had to focus in the static body. I started with the base from there each piece was added using its respective constrain with no problem. However, one of our mates was different, our gear matte had to be defined with an extra parameter, for which we introduce the Mechanic constrain tool which has gears pre-defined. This constrain is the most important since it presents the movement of flow for which our system was design.

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Interference At the end I had to test for interference. Which at the beginning where 45 to be exact, for most of them where solvable I had to increment the radius of some of my holes for the screws. however there were a few I had to ignore. This where caused by the nut, since is not a design problem because you can fix it then you tight the screws.

Appendix

References

Rotary Gear Pump Pdf by Dr. Herli Surjanhata MIE DEPARTMENT - NJIT 3/24/2017 https://www.solidworks.com/sw/education https://www.ptc.com/en/products/cad/creo/parametric...