Research on Device of Hydraulic Pushing

2012 ◽  
Vol 580 ◽  
pp. 260-262
Author(s):  
Kai Liu ◽  
Hai Ying Zhou ◽  
Ming Jiang
Keyword(s):  
Simple Structure ◽  
High Efficiency ◽  
Steel Rail ◽  
New Device ◽  
Action Point ◽  
Hydraulic Equipment ◽  
Optimizing Design ◽  
New Type ◽  
Pulling Force ◽  
Clamping Device

The new device of hydraulic pushing device achieves enclasping of clamping device and steel rail locking effect by the wedge clamping on the both side of the steel rail, so as to provide thrust and pulling force action point for the cylinder of hydraulic equipment. Compare with other devices, the new type of device has more advantages like : simple structure, reliable clamp, easy erection and high efficiency. To further optimize the mechanical clamping device, the pressure and the friction coefficient of the wedge. the shell and the rail were analyzed emphatically. Combining experimental data and the reasonable angle of wedge and optimizing design direction was applied.

scholarly journals The new silicone elastometric half-piece respirator, VJR-NMU: A novel and effective tool to prevent COVID-19

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0237206
Author(s):  
Anan Manomaipiboon ◽  
Sujaree Pupipatpab ◽  
Pongsathorn Chomdee ◽  
Anusang Chitsomkasem ◽  
Yutthana Apichatbutr ◽  
...  
Keyword(s):  
Healthcare Workers ◽  
High Efficiency ◽  
Protective Device ◽  
New Device ◽  
Care Workers ◽  
Test Kit ◽  
Current Production ◽  
New Type ◽  
Infection Disease ◽  
N95 Respirators

Filter facepiece respirators (FFRs) are critical for preventing the transmission of respiratory tract infection disease, especially the dreadful coronavirus 2 (SARs-CoV-2). The N95 mask is a prototype, high-efficiency protective device that can effectively protect against airborne pathogens of less than 0.3 μm. The N95 mask is tightly fitting and has high filtration capacity. The ongoing COVID-19 pandemic has led to a greater requirement for FFR. This rising demand greatly exceeds current production capabilities and stockpiles, resulting in shortages. To address this, our team has invented a new type of half-piece respirator made from silicone and assembled with HEPA or elastostatic filter. A variety of methods have been used to evaluate this new device, including a qualitative fit test with the Bitrex® test kit and filtration test. The preliminary results showed that the new elastometric respirators pass the fit test. The filtration tests also confirmed the superiority of the new respirator over traditional N95 masks, with a mean performance of protection greater than 95%. For the filters, we used two types: SafeStar, which is a kind of HEPA filter; and CareStar, which is considered an elastostatic filler. CareStar was developed to filter virus and bacteria in the operating room, with a limit duration of use up to 24 h, while the safe star was designed for 72 h use and has the quality equivalent to a HEPA filter. Our study demonstrated superior filtration efficacy of both filters, more than 98% even after 24 h of use. CareStar has significantly more filtration efficacy than a safe star (p < 0.001). In conclusion, the development of our new N99 half-piece respirator should ultimately be applicable to healthcare workers with at least non-inferiority to the previously used N 95 respirators. As a universal masking policy is generally implemented, health care workers who are at risk must be protected with appropriate devices. Currently, the adequate supply of such equipment is not feasible. The advent of the new protective device will help protect healthcare workers and replenish the shortage of N95 respirators during the COVID-19 pandemic.

scholarly journals The new silicone N99 half-piece respirator, VJR-NMU N99: A novel and effective tool to prevent COVID-19

2020 ◽  
Author(s):  
Anan Manomaipiboon ◽  
Sujaree Pupipatpab ◽  
Pongsathorn Chomdee ◽  
Pathiporn Boonyapatkul ◽  
Thananda Trakarnvanich
Keyword(s):  
Healthcare Workers ◽  
High Efficiency ◽  
Protective Device ◽  
New Device ◽  
Test Kit ◽  
Current Production ◽  
New Type ◽  
Infection Disease ◽  
N95 Respirators ◽  
Filtration Capacity

AbstractFilter facepiece respirators (FFRs) are critical for preventing the transmission of respiratory tract infection disease, especially the dreadful coronavirus 2 (SARs-CoV-2). The N95 mask is a prototype, high-efficiency protective device that can effectively protect against airborne pathogens of less than 0.3 μm. The N95 mask is tightly fitting and has high filtration capacity. The ongoing COVID-19 pandemic has led to a greater requirement for FFR. This rising demand greatly exceeds current production capabilities and stockpiles, resulting in shortages. To address this, our team has invented a new type of half-piece respirator made from silicone and assembled with HEPA or elastostatic filter. A variety of methods have been used to evaluate this new device, including a qualitative fit test with the Bitrex® test kit and filtration test. The preliminary results showed that the new N99 respirators pass the fit test. The filtration tests also confirmed the superiority of N99 over traditional N95 masks, with a mean performance of protection greater than 95%. For the filters, we used two types: SafeStar, which is a kind of HEPA filter; and CareStar, which is considered an elastostatic filler. CareStar was developed to filter virus and bacteria in the operating room, with a limit duration of use up to 24 h, while the safe star was designed for 72 h use and has the quality equivalent to a HEPA filter. Our study demonstrated superior filtration efficacy of both filters, more than 98% even after 24 h of use. CareStar has significantly more filtration efficacy than a safe star (p < 0.001). In conclusion, the development of our new N99 half-piece respirator should ultimately be applicable to healthcare workers with at least non-inferiority to the previously used N 95 respirators.. Currently, the adequate supply of such equipment is not feasible. The advent of the new protective device will help protect healthcare workers and replenish the shortage of N95 respirators during the COVID-19 pandemic.

scholarly journals Experimental Evaluation of Airlift Performance for Vertical Pumping of Water in Underground Mines

2021 ◽  
Author(s):  
Parviz Enany ◽  
Oleksandr Shevchenko ◽  
Carsten Drebenstedt
Keyword(s):  
Water Flow ◽  
High Efficiency ◽  
Experimental Studies ◽  
Theoretical Models ◽  
Injection System ◽  
Experimental Investigations ◽  
Flow Mode ◽  
New Device ◽  
Riser Pipe ◽  
Airlift Pump

AbstractThis paper presents experimental studies on the optimization of air–water flow in an airlift pump. Airlift pumps use compressed gas to verticall transport liquids and slurries. Due to the lack of theoretical equations for designing and predicting flow regimes, experimental investigations must be carried out to find the best condition to operate an airlift pump at high efficiency. We used a new air injection system and different submergence ratios to evaluate the output of a simple pump for vertical displacement of water in an underground mine. The tests were carried out in a new device with 5.64 m height and 10.2 cm circular riser pipe. Three air-jacket pipes, at different gas flows in the range of 0.002–0.09 m3/s were investigated with eight submergence ratios. It was found that with the same air flow rate, the most efficient flow of water was achieved when an air jacket with 3 mm diameter holes was used with a submergence ratio between 0.6 and 0.75. In addition, a comparison of practical results with two theoretical models proposed by other investigators showed that neither was able to accurately predict airlift performance in air–water flow mode.

The Important Influences for Performance of Multiphase Flow Mixed Microbubble Generator

2013 ◽  
Vol 295-298 ◽  
pp. 1049-1052
Author(s):  
Zhe Kun Li ◽  
Wen Li Shi ◽  
Wei He ◽  
Yu Jin Fan
Keyword(s):  
Multiphase Flow ◽  
Simple Structure ◽  
High Efficiency

Multiphase flow mixed microbubble generator (MFMMG) is an effective generator and has many advantages, such as simple structure, easy maintain, small, high efficiency, and so on. The paper found out the important influences for performance of MFMMG and analyzed them. The experiment showed that the analysis is correct and efficient. The paper will be useful for analyzing and designing microbubble generators.

Research on Heavy Truck Cab Tilting Motor

2013 ◽  
Vol 310 ◽  
pp. 343-347
Author(s):  
Wen Fu Zhang ◽  
Xue Yi Zhang ◽  
Jian Long Hu ◽  
Hong Bin Yin
Keyword(s):  
Permanent Magnet ◽  
Small Volume ◽  
Simple Structure ◽  
High Efficiency ◽  
Dc Motor ◽  
Reliable Operation ◽  
Oil Pump ◽  
Heavy Truck ◽  
Permanent Magnet Dc Motor ◽  
Operation Characteristics

Heavy truck cab manual oil pump consumes more time and strength. Using tilting motor can produce larger tilting force for reversing the heavy truck cab and improve the tilting efficiency. The power of tilting motor, permanent magnet, armature plate and winding parameters are optimized on the basis of analyzing the cab tilting system works and the characteristics of the permanent magnet DC motor. The designed Nb-Fe-B PM DC motor is small volume, light weight high efficiency, simple structure and reliable operation characteristics, which can improve the security of tilting device of the heavy truck cab.

Suspend-Dome Static Behavior Analysis

2013 ◽  
Vol 351-352 ◽  
pp. 1057-1060 ◽  
Author(s):  
Xi Yun Dai ◽  
Xiang Yun Kong ◽  
Lin Tian
Keyword(s):  
Design Method ◽  
Joint Stiffness ◽  
Hybrid Structure ◽  
Structure Form ◽  
Static Behavior ◽  
Structure System ◽  
Optimizing Design ◽  
New Type ◽  
Dome Structure ◽  
Cable Dome

Suspend-dome structure form which colligates advantages of cable dome and reticulated shell is a new type spatial hybrid structure system. This article introduced the configuration and principle of suspend-dome structure system, and researched the structural behavior influence by altering the joint stiffness, vector height of the suspend-dome and the loop cable pretension. The results show that suspend-dome structure should make comprehensive consideration on interaction between vector height, prestress application and other factors, and relevant optimizing design method can be adopted in the design.

Design for New Type Tobacco Sewing Machine Head

2014 ◽  
Vol 687-691 ◽  
pp. 300-303
Author(s):  
Li Zhang ◽  
Ting You Wang ◽  
Hong Bin Liu
Keyword(s):  
Simple Structure ◽  
Leaf Damage ◽  
Analytic Method ◽  
Sewing Machine ◽  
Tobacco Leaf ◽  
Existing Problems ◽  
Damage Rate ◽  
New Type ◽  
Drawing Method ◽  
New Machine

In order to reducing the worker's labor intensity in tobacco sewing, a new machine adoption with single thread sewing technology was developed. Through analyzing the existing problems in sewing machine and the tobacco damage situation, using drawing method, analytic method and other methods, the shape of the sewing component, hook line components and other mating parts were designed. The results show that the machine has the advantages of simple structure, controllable sewing speed, adjustable leaf thickness and quantity. And the tobacco leaf damage rate is low. The comprehensive efficiency in tobacco leaf knitting with this machine is four times higher than that with hand knitting. Its application prospect is considerable.

scholarly journals Minimal Structural ART Neural Network and Fault Diagnosis Application of Gas Turbine

2016 ◽  
Vol 10 (1) ◽  
pp. 13-22
Author(s):  
Qingyang Xu
Keyword(s):  
Neural Network ◽  
Fault Diagnosis ◽  
Gas Turbine ◽  
Cognitive Process ◽  
Simple Structure ◽  
High Efficiency ◽  
Complex Structures ◽  
Resonance Theory ◽  
Adaptive Resonance ◽  
Binary Input

Adaptive Resonance Theory (ART) model is a special neural network based on unsupervised learning which simulates the cognitive process of human. However, ART1 can be only used for binary input, and ART2 can be used for binary and analog vectors which have complex structures and complicated calculations. In order to improve the real-time performance of the network, a minimal structural ART is proposed which combines the merits of the two models by subsuming the bottom-up and top-down weight. The vector similarity test is used instead of vigilance test. Therefore, this algorithm has a simple structure like ART1 and good performance as ART2 which can be used for both binary and analog vector classification, and it has a high efficiency. Finally, a gas turbine fault diagnosis experiment exhibits the validity of the new network.

scholarly journals Parameters and design optimization of the ring piezoelectric ceramic transformer

2015 ◽  
Vol 05 (03) ◽  
pp. 1550022 ◽  
Author(s):  
Jiří Erhart
Keyword(s):  
High Efficiency ◽  
Strong Electric Field ◽  
Resistive Load ◽  
Optimum Load ◽  
Aspect Ratios ◽  
Transformation Ratio ◽  
Ring Segment ◽  
New Type ◽  
Transformation Parameters ◽  
Piezoelectric Ceramic Transformer

Main aim of the presented paper is the theoretical analysis and experimental verification of the transformation parameters for the new type of nonhomogeneously poled ring transformer. The input part is poled in the thickness direction and output part in the radial direction. Two transformer geometries are studied — the input part is at inner ring segment, or it is at the outer ring segment. The optimum electrode size aspect ratios have been found experimentally as [Formula: see text] for the ring with aspect ratio [Formula: see text]. The fundamental as well as higher overtone resonances were studied for the transformation ratio, the optimum resistive load, efficiency and no-load transformation ratio. Higher overtones have better transformation parameters compared to the fundamental resonance. The new type ring transformer exhibits very high transformation ratios up to 200 under no-load and up to 13.4 under a high efficiency of 97% at the optimum load conditions of 10 [Formula: see text]. Strong electric field gradient at the output circuit is applicable for the electrical discharge generation.

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