Low Cost Micro-Pump Valve Design

2012 ◽  
Author(s):  
Sina Khalilian ◽  
Simon S. Park ◽  
Theodor Freiheit
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Manufacturing Cost ◽  
Test Results ◽  
Valve Design ◽  
Static Test ◽  
Micro Pump ◽  
Pump Valve ◽  
Novel Method ◽  
Geometrical Dimensions

In order to achieve an overall low cost micro-pump, the valves, a critical micro-pump subcomponent, have been targeted for design for low manufacturing cost, high endurance, and reliability. In the proposed design, the inlet and outlet valves are etched on one piece of planar stainless steel shim stock. To investigate the static and dynamic behaviour of different valves, a design of experiment is performed on the geometrical dimensions of the valves. By using these physical results in a mathematical model for a micro-pump, the effect of valve parameters on micro-pump performance is predicted. Furthermore, a novel method for micro-pump valve selection is developed based on static test results for flow and backflow characteristics of different valves. Applying design for manufacture and mass fabrication techniques, together with an aim for high performance, robustness, and long fatigue life make the proposed valve design applicable to a variety of micro-pump applications.

A Mechatronic Approach to Compact Fluid Disc Valve Design

1995 ◽  
Vol 209 (2) ◽  
pp. 115-125
Author(s):  
G A Parker ◽  
Y B Sun
Keyword(s):  
Low Cost ◽  
Dynamic Performance ◽  
Operating Mode ◽  
Industrial Applications ◽  
Test Results ◽  
Valve Design ◽  
Electromagnetic Characteristics ◽  
High Control ◽  
Fail Safe ◽  
Pilot Valve

The work presented in this paper deals mainly with a mechatronic approach to compact disc valve design and concentrates on improvements to the disc valve electromagnetic characteristics, the diaphragm design and the dynamic performance. A novel diaphragm-disc force motor has been successfully developed incorporating a pair of permanent ring magnets. It has the advantages of low electric power consumption at the null position, dual-lane electrical structure for fail-safe operation, high control accuracy and should be competitive with existing torque motors due to its low cost and simple construction. The research involved designing and testing a prototype disc pilot valve with a dual-lane operating mode. The test results showed that the valve has satisfactory static and dynamic characteristics for industrial applications.

scholarly journals SYNTHESIS AND STABILITY OF RESVERATROL-CONJUGATED GOLD NANOPARTICLES MODIFIED WITH POLYETHYLENE GLYCOL

2020 ◽  
pp. 230-236
Author(s):  
RADITYA ISWANDANA ◽  
RICHA NURSELVIANA ◽  
SUTRIYO SUTRIYO
Keyword(s):  
Particle Size ◽  
Gold Nanoparticles ◽  
Polyethylene Glycol ◽  
Zeta Potential ◽  
High Performance ◽  
Entrapment Efficiency ◽  
Test Results ◽  
Novel Method ◽  
The Stability ◽  
Phosphate Buffered Saline

Objective: Gold nanoparticles (AuNPs) are highly useful for drug delivery, but their application is limited by their stability as they readily aggregate.This issue can be prevented by adding a stabilizing agent such as resveratrol (RSV), which is a polyphenol derived from plants, that is used to preventcancer. Therefore, we propose a novel method to prepare stable RSV-conjugated nanoparticles modified with polyethylene glycol (RSV-AuNP-PEG).Methods: In the first step, the Turkevich method was used to synthesize the AuNPs. Then, PEG was added as stabilizer agent and conjugated with RSV.The synthesized conjugates were characterized using ultraviolet-visible spectrophotometry, Fourier transform infrared spectroscopy, particle sizeanalysis, and high-performance liquid chromatography.Results: The obtained RSV-AuNP-PEG had a particle size of 83.93 nm with a polydispersity index (PDI) of 0.562 and formed a translucent purple-redfluid in solution. The zeta potential was −22.9 mV, and the highest entrapment efficiency was 75.86±0.66%. For comparison, the RSV-AuNP solutionwas purple and turbid, the particle size was 51.97 nm with a PDI of 0.694, and the zeta potential was −24.6 mV. The stability test results showed thatthe storage stability of RSV-AuNP-PEG was better than that of AuNP-RSV. Further, the RSV-AuNP-PEG was shown to be most stable in 2% bovine serumalbumin (BSA) while the AuNP-RSV was most stable in 2% BSA in phosphate-buffered saline pH 7.4.Conclusion: These results show that modification of RSV-conjugated AuNPs with PEG effectively prevents their aggregation in storage, but only incertain mediums.

Concurrent Tolerance Design Based on Manufacturing Cost and Quality Loss

2014 ◽  
Vol 687-691 ◽  
pp. 4996-4999
Author(s):  
Zhang Rong
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Engineering Application ◽  
Manufacturing Cost ◽  
Tolerance Design ◽  
Quality Loss ◽  
Product Loss ◽  
Parameterized Model ◽  
The Cost ◽  
Design And Manufacture

With the constraints on manufacturing capacity, the satisfaction of product performance and the cost of manufacture are contradictory, the problem between high-performance and low-cost must be solved at the period of design and manufacture for product. To solve this problem, the product loss model has been analyzed, the parameterized and non-parameterized model of anticipant losses has been researched, with concurrent design, in connection with the product with multiple correlated assembly functional dimensions, the relation function between quality loss and process dimension tolerance has been provided, the concurrent tolerance design mathematical model based on lowest-cost and quality loss has been established. The applied case shows that this method has important guiding significance for engineering application.

scholarly journals A Pragmatic and High-Performance Radiative Cooling Coating with Near-Ideal Selective Emissive Spectrum for Passive Cooling

Coatings ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 144 ◽  
Author(s):  
Mingxue Chen ◽  
Wenqing Li ◽  
Shuang Tao ◽  
Zhenggang Fang ◽  
Chunhua Lu ◽  
...  
Keyword(s):  
High Performance ◽  
Large Scale ◽  
Low Cost ◽  
Passive Cooling ◽  
Radiative Cooling ◽  
Test Results ◽  
External Energy ◽  
Functional Nanoparticles ◽  
Space Cooling ◽  
The Universe

Radiative cooling is a passive cooling technology that can cool a space without any external energy by reflecting sunlight and radiating heat to the universe. Current reported radiative cooling techniques can present good outside test results, however, manufacturing an efficient radiative material which can be applied to the market for large-scale application is still a huge challenge. Here, an effective radiative cooling coating with a near-ideal selective emissive spectrum is prepared based on the molecular vibrations of SiOx, mica, rare earth silicate, and molybdate functional nanoparticles. The radiative cooling coating can theoretically cool 45 °C below the ambient temperature in the nighttime. Polyethylene terephthalate (PET) aluminized film was selected as the coating substrate for its flexibility, low cost, and extensive production. As opposed to the usual investigations that measure the substrate temperature, the radiative cooling coating was made into a cubic box to test its space cooling performance on a rooftop. Results showed that a temperature reduction of 4 ± 0.5 °C was obtained in the nighttime and 1 ± 0.2 °C was achieved in the daytime. Furthermore, the radiative cooling coating is resistant to weathering, fouling, and ultraviolet radiation, and is capable of self-cleaning due to its hydrophobicity. This practical coating may have a significant impact on global energy consumption.

Fabrication and Performance Analysis of PMMA Substrate Diffuser/Nozzle Micro-Pump by CNC Milling Machine

2009 ◽  
Vol 60-61 ◽  
pp. 198-201
Author(s):  
Li Tian ◽  
Wei Wang ◽  
Xiao Wei Liu ◽  
Ying Zhang ◽  
Shu Yi Ji
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Maximum Flow ◽  
Microfluidic System ◽  
Milling Process ◽  
Cnc Milling ◽  
Micro Pump ◽  
Orifice Flow ◽  
And Performance ◽  
Nozzle Structure

A new low cost high performance PMMA micropump, developed for microfluidic system, is presented. According to the orifice flow theory, a diffuser/nozzle structure is fabricated with precision milling process, and packaged with the film-sealing at the condition of thermal bonding process. The size parameter of the diffuser/nozzle structure is 2.5mm *150µm, 8° conical angle, the volume of PMMA micropump is 14×14×2.5 mm3. And experimental results show that the PMMA micropump can produce a maximum back pressure of 1906.1Pa and a maximum flow rate of 564µL/min under 220 V, 500Hz squired wave power supply.

Vacuum Packaging for High-Performance Low Cost MEMS Gyro Used in 6 Degree of Freedom Inertial Navigation System (DOF INS)

2011 ◽  
Vol 2011 (1) ◽  
pp. 000627-000634
Author(s):  
D. DeRoo ◽  
K. Shcheglov ◽  
M. Inbar ◽  
D. Smukowski ◽  
P. Zappella ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
High Vacuum ◽  
High Volume ◽  
High Yield ◽  
Test Results ◽  
Batch Fabrication ◽  
Mems Gyroscopes ◽  
Commercial Applications ◽  
The Military

Sensors in Motion Inc. is developing a navigation grade 6 DOF MEMS INS using its proprietary and patented technologies. The military is investing in INS and IMU technology which can answer its needs as well as provide the baseline for hundreds of other DOD and commercial applications which need a C-swap sensitive utility. SIM’s technology for MEMS gyros was conceived to address past problems associated with MEMS gyroscopes while leveraging the C-swap benefits of high volume, high yield batch fabrication, automated packaging, self-calibration, and thermal compensation. A key requirement for the MEMS Gyroscope is controlled vacuum-levels to obtain high Q devices. Gyro die are packaged using a multilayer package and getter system, which provides and maintains sealed vacuum cavities. Die are assembled into the LCC package using conventional assembly techniques and the package cavity is sealed using an SST 3150 high-vacuum sealing system. The SST system is used to activate a thin-film getter layer on the package lid before reflow of the solder seal. Resulting pressure levels have been determined by characterizing packaged but unlidded sensor die in a vacuum chamber. The package material, process flow and test results are summarized and reviewed. Tooling, process parameters, and test techniques are explained.

Preparation and Properties Study of a Low-Cost Ammonia Carboxylate Concrete Superplasticizer

2019 ◽  
Vol 11 (11) ◽  
pp. 1603-1606
Author(s):  
Fankui Zeng ◽  
Junce Zhang ◽  
Xiaoning Wei ◽  
Baoping Li
Keyword(s):  
Compressive Strength ◽  
High Performance ◽  
Low Cost ◽  
Reducing Agent ◽  
Test Results ◽  
Optimum Dosage ◽  
Polycarboxylate Superplasticizer ◽  
Gradual Loss ◽  
New Type

Polycarboxylate superplasticizer is the water reducing agent that has the best application prospect in concrete engineering. In this paper, a new type of polycarboxylate superplasticizer is prepared and its properties, such as dispersibility and water-reducing rate in cement particles, slump degree and slump extension in concrete and gradual loss are tested. The test results reveal that the water-reducing agent solves the problem that the traditional polycarboxylate superplasticizer is too sensitive to the change of dosage and that it has good dispersibility to cement particles. The optimum dosage is 2.3%–2.9% and the water-reducing rate is 25.6%–33.0%. The test proves that the high-performance water-reducing agent has a good water-reducing effect. The concrete fluidity of mixed with water-reducing agent is significantly improved and the compressive strength is also improved.

Vibration/Shock-Tolerant Capillary Two-Phase Loop Technology for Vehicle Thermal Control

2008 ◽  
Author(s):  
Xudong Tang ◽  
Chanwoo Park
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Thermal Control ◽  
Small Scale ◽  
Manufacturing Cost ◽  
Two Phase ◽  
Loop Heat Pipes ◽  
Military Vehicles ◽  
Phase Loop

Two-phase thermal management technologies are promising cooling solutions for the high performance electronics in the next generation military and commercial vehicles. However, vibrations (∼ 10Grms in commercial automobile engines and transmissions) and shocks (30G to 1,200G in military combat vehicles, caused by gun firing, ballistic launch and abrupt maneuvering) present a severe challenge to any capillary-driven (i.e., passive) two-phase devices. A low-cost, vibration/shock-tolerant Capillary Two-Phase Loop (CTPL) technology was developed as a cooling alternative for the future military vehicles. Unlike the traditional two-phase cooling loops such as Loop Heat Pipes (LHP) and Capillary Pumped Loops (CPL), the CTPL offers the following advantages: (1) lower manufacturing cost by sintering the evaporator wick in-situ; (2) improved tolerance to vibrations and shocks due to the improved mechanical strengths of the in-situ sintered wick; (3) improved heat flux performance because of the non-inverted meniscus wick. Small-scale proof-to-concept CTPL prototypes were successfully tested up to 120W of heat input and under multiple, consecutive shocks of up to 6.6G.

Development of a Starch Adhesive for Corrugated Board under Room Temperature

2011 ◽  
Vol 179-180 ◽  
pp. 812-817 ◽  
Author(s):  
Peng Luo ◽  
Yu Han Liu ◽  
Xiao Qing Zhao ◽  
Pan Pan Song ◽  
Nian Sheng Tan ◽  
...  
Keyword(s):  
Optimum Condition ◽  
Sodium Hypochlorite ◽  
Bonding Strength ◽  
High Performance ◽  
Room Temperature ◽  
Low Cost ◽  
Petroleum Products ◽  
Industrial Wastes ◽  
Manufacturing Cost ◽  
Corrugated Board

The use of starch as a renewable and biodegradable adhesive is becoming increasingly attractive because of the environmental concerns about the industrial wastes generated from petroleum products and the growing awareness of the potential deleterious consequences of greenhouse gas emissions from these activities. Starch adhesive is most extensively used in corrugated board industry because of the abundant supply, low cost, renewability, biodegradability, and ease of chemical modifications. Starch adhesive has great effect on the performance, production technology and manufacturing cost of the corrugated board. It is of great importance to develop starch adhesive with stable properties, high performance, good viscosity, fast curing speed to meet the market requirement. In this paper, oxidation of starch by sodium hypochlorite under aqueous alkaline conditions with the aid of the catalysis of nickel sulphate at room temperature was investigated. The effects of sodium hypochlorite loading and caustic soda dosage on the properties of the starch adhesive were examined. Optimization of starch oxidation is desirable to achieve the highest initial tack and bonding strength. The optimum synthesis condition was obtained. Under the optimum condition, Under the optimum condition, 98.7% of the initial tack and 11.4 N/25 mm of the bonding strength were obtained respectively.. The modified starch adhesive showed great potential for industrial application.

scholarly journals Design of a Ku-band Tile T/R Module

2021 ◽  
Vol 2121 (1) ◽  
pp. 012002
Author(s):  
Yu Zhang ◽  
Hailong Zhao ◽  
Xuefeng Song ◽  
Zenglu Li
Keyword(s):  
Process Optimization ◽  
Structural Design ◽  
High Performance ◽  
Low Cost ◽  
Test Results ◽  
Batch Production ◽  
Module Design ◽  
Technical Indicator ◽  
Structure Layout ◽  
Ku Band

Abstract This paper introduces a 16 channel Ku-band tile T/R module design in 3D highly integrated packaging. The technical indicator design of T/R module is completed by using four channel amplitude phase multifunctional chip and various design methods. Through reasonable indicator distribution and structure layout, the miniaturization design of T/R module is realized by using high-density substrate and 3D interconnection structure. Through process optimization, structural design and simulation verification, the reliability and producibility of T/R module is studied, and the consistency of products is improved. The test results show that the design has good microwave performance and can meet the requirements of high performance, low cost and batch production of Ku-band T/R module.

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