Language

English (en)

Publication Date

Fall 12-9-2024

Document Type

Final Report

Embargo Date

12-6-2024

Problem Statement

In many research and medical settings, small amounts of liquids are dispensed using syringes. Very often, syringe pumps like those shown in the left image, are used to control the amount (i.e., flow rate) of dispensed/collected fluid. There are single- or multi-style syringe pumps; the one shown is single-style; multi-style have 2-8 parallel syringes that are all pushed/pulled at the same flow rate. However, these syringe
pumps are bulky and heavy, making them impractical for many experimental setups. Commercial alternatives include very expensive syringe pumps with remote dispensers. Furthermore, it is often necessary to have two syringe pumps operate in parallel and with different flow rates. Dr. Weisensee would like the student team to design and build an alternative to commercial syringe pumps that fulfills the following specifications: • It is light-weight (vertically above an experimental setup (using a clamp on
a ½’’ post or ¼-20 screws spaced at 1’’ on a platform)
• It can accommodate various sizes of standard plastic
syringes or glass syringes (1ml-50ml)
• It can dispense liquid between 1μL/min and 10mL/min
(can be achieved by varying the motor speed and/or the
syringe size – final design should have multiple pre-sets
in flow rates for multiple syringe sizes)
• It accommodates two syringes that operate in parallel,
but with different flow rates
• The two liquids are dispensed simultaneously using two
concentric needles (see Fig. 2 for a sketch). The inner
needle should be Luer-connected and G30 or smaller.
The outer “needle” could be another needle (G22 or
larger) with Luer connection, or a hollow tube (metal or
stiff plastic). The goal is to engulf the inner liquid with
the outer one when forming droplets at the needle tip.
• The liquids in the syringes can be heated up to 80°C

Author's School

McKelvey School of Engineering

Author's Department

Mechanical Engineering and Materials Science

Class Name

Mechanical Engineering Design Project (MEMS 411)

IMG_4090.HEIC (1807 kB)
IMG_4088.HEIC (2377 kB)
IMG_4089.HEIC (2131 kB)
IMG_4086.MOV (5919 kB)
IMG_4087.MOV (14737 kB)

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