Development and Application of a New Type Rock Drill with Hydraulic Rotary Cutting and Pneumatic Impacting

2012 ◽  
Vol 152-154 ◽  
pp. 1373-1376
Author(s):  
You Xin Luo ◽  
Hui Jun Wen ◽  
Yu Zhou
Keyword(s):  
High Performance ◽  
Simple Structure ◽  
High Reliability ◽  
Price Ratio ◽  
Rock Drill ◽  
Drilling Tools ◽  
New Type ◽  
Rotary Cutting ◽  
Pneumatic Power ◽  
The Impact

A new type hydraulic rotary cutting and pneumatic impacting rock drill is used to drill medium and deep hole. This rock drill is made up of three components: impact system, rotary system and dedust mechanism. The power is provided by hydraulic liquid and compressed air, and the hydraulic power is separated with the pneumatic power. The rotary system driven by hydraulic liquid transfers motion and force by its components: motor, input gear, mid-gear, revolving sheath, etc. The maximum rotary power is greater than the impact power. Compared with other drill, this new rock drill has a simple structure, high reliability, fast drilling speed, long service life of the drilling tools, easy maintenance, high performance-price ratio and other advantages

Multiple CMOS Intersection Measuring System Modeling and Analysis

2012 ◽  
Vol 614-615 ◽  
pp. 1299-1302
Author(s):  
Ming Jing Li ◽  
Yu Bing Dong ◽  
Guang Liang Cheng
Keyword(s):  
High Speed ◽  
High Performance ◽  
High Reliability ◽  
System Modeling ◽  
Position Effect ◽  
Field Of View ◽  
Measuring System ◽  
Price Ratio ◽  
Matlab Simulation ◽  
Modeling And Analysis

Multiple high speed CMOS cameras composing intersection system to splice large effect field of view(EFV). The key problem of system is how to locate multiple CMOS cameras in suitable position. Effect field of view was determined according to size, quantity and dispersion area of objects, so to determine camera position located on below, both sides and ahead to moving targets. This paper analyzes effect splicing field of view, operating range etc through establishing mathematical model and MATLAB simulation. Location method of system has advantage of flexibility splicing, convenient adjustment, high reliability and high performance-price ratio.

Analysis on Modifying Asphalt by Rubber Powder

2013 ◽  
Vol 561 ◽  
pp. 107-112
Author(s):  
Hui Guang Bian ◽  
Yu Jian Wu ◽  
Chuan Sheng Wang
Keyword(s):  
High Performance ◽  
Mesh Size ◽  
Price Ratio ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Optimal Value ◽  
The Impact

This article by groups of comparison, analyzes the impact of he content, the mesh size and the kinds of Rubber Powder to Modified asphalt properties. Experiments concluded that, the content of rubber powder has the most impact to rubber powder modifying asphalt properties, and when the content in 10%～20% has a optimal value; the mesh size is not the thinner the better; ordinary rubber powder has a high performance-price ratio.

Design of Permanent Magnet Synchronous Motor Servo System

2014 ◽  
Vol 986-987 ◽  
pp. 1067-1070
Author(s):  
Hao He ◽  
Jiao Yu Liu ◽  
Xian Xi Pan ◽  
Li Min Kan
Keyword(s):  
Vector Control ◽  
Permanent Magnet ◽  
High Performance ◽  
High Reliability ◽  
Permanent Magnet Synchronous Motor ◽  
Servo System ◽  
Synchronous Motor ◽  
Price Ratio ◽  
Control Performance ◽  
Dsp Controller

. The objective of this work is to improve the control performance by redesigning the permanent magnet synchronous motor servo system .The vector control thought is used to control the permanent magnet synchronous motor. So it is easy to realize the torque current characteristic of linear. The design of the permanent magnet synchronous motor servo system is first proposed. The hardware and software designs are realized in this paper, and it is subsequently verified experimentally. Experimental results show that the DSP controller for the permanent magnet synchronous motor servo system has extensive applicability, high reliability and high performance price ratio.

scholarly journals Thermomechanically Induced Precipitation in High-Performance Ferritic (HiperFer) Stainless Steels

2020 ◽  
Vol 10 (16) ◽  
pp. 5713 ◽  
Author(s):  
Xiuru Fan ◽  
Bernd Kuhn ◽  
Jana Pöpperlová ◽  
Wolfgang Bleck ◽  
Ulrich Krupp
Keyword(s):  
Mechanical Properties ◽  
Stainless Steels ◽  
High Performance ◽  
Thermomechanical Processing ◽  
Thermal Power ◽  
Power Conversion ◽  
Treatment Parameter ◽  
New Type ◽  
Alloy Microstructure ◽  
The Impact

Novel high-performance fully ferritic (HiperFer) stainless steels were developed to meet the demands of next-generation thermal power-conversion equipment and to feature a uniquely balanced combination of resistance to fatigue, creep, and corrosion. Typical conventional multistep processing and heat treatment were applied to achieve optimized mechanical properties for this alloy. This paper outlines the feasibility of thermomechanical processing for goal-oriented alteration of the mechanical properties of this new type of steel, applying an economically more efficient approach. The impact of treatment parameter variation on alloy microstructure and the resulting mechanical properties were investigated in detail. Furthermore, initial optimization steps were undertaken.

scholarly journals Fault Diagnosis Research on Impact System of Hydraulic Rock Drill Based on Internal Mechanism Testing Method

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Yelin Li ◽  
Youxin Luo ◽  
Xiao Wu
Keyword(s):  
Fault Diagnosis ◽  
Fault Rock ◽  
Impact Performance ◽  
Rock Drill ◽  
Diagnosis Method ◽  
New Type ◽  
Internal Mechanism ◽  
Left And Right ◽  
Improved Model ◽  
The Impact

In the production and manufacturing process of hydraulic rock drill, there are small impact energy and low impact frequency, and a fault diagnosis method based on the internal mechanism testing and testing of the hydraulic rock drill is proposed. This method is used to test the change law of hydraulic oil in the rock drill, by retaining the test holes on the cylinder body and other important components of the hydraulic rock drill. At the same time, the mathematical method is used to deal with the test curve, and the influence of pressure pulsation characteristics of the front and rear chambers of the impact piston and the left and right valve chambers of the reversing valve on the impact performance of the rock drill is analyzed. Based on Newton’s law, the model of the impact piston and reversing valve is established. According to the velocity and other parameters of the impact piston, the size of the impact piston switch point is calculated. The coupling between the movement of the impact piston and the movement of the reversing valve is analyzed according to the model established. Comparing the results of the experimental data, the correctness of the fault diagnosis analysis method and model is verified. The effect of the fault rock drill and the improved model is compared, and the theoretical basis is provided for the fault diagnosis of the rock drill and the design of a new type of rock drill.

Design of the DSP Controller for the Magnetic-Control Soft-Starter

2013 ◽  
Vol 344 ◽  
pp. 145-148
Author(s):  
Jing Chen ◽  
Bin Zhou ◽  
You Xin Yuan ◽  
Huai Bin Zhu
Keyword(s):  
High Performance ◽  
High Reliability ◽  
Magnetic Control ◽  
Price Ratio ◽  
Starting Current ◽  
Soft Start ◽  
Ac Motor ◽  
Soft Starter ◽  
Three Phase ◽  
Dsp Controller

This objective of this work is to design and implement the magnetic-control soft-start controller for the motor starting at rated current. The motor is accelerated smoothly, the starting current is reduced and motor starting performance is improved by this soft-starting technology. For eliminating the harmfulness of the starting current of the three-phase AC motor, the DSP controller is used as the controller in this magnetic-control soft-starter. The design of the DSP controller for the magnetic-control soft-starter is first proposed. The hardware and software designs are realized in this paper, and it is subsequently verified experimentally. Experimental results show that the DSP controller for the magnetic-control soft-starter has extensive applicability, high reliability and high performance price ratio.

Contactless OLTC Technology Based on Inductive Load

2013 ◽  
Vol 392 ◽  
pp. 484-488
Author(s):  
Jin Long Tu ◽  
Cai Xia Pan
Keyword(s):  
High Performance ◽  
Voltage Drop ◽  
High Reliability ◽  
Electrical Circuit ◽  
Inductive Load ◽  
Transition Resistance ◽  
Tap Changer ◽  
Current Calculation ◽  
Load Tap Changer ◽  
The Impact

This paper studies the fast On-Load Tap Changer (OLTC) technology of contactless switch without transition resistance or transition reactor. It not only provides the equivalent circuit of OLTC, the impact current calculation formula and the OLTC simulation waveform based on the inductive load but also supplies with the main electrical circuit and the waveform recorded in the experiments. The MJN3 contactless voltage-controlled power source has been developed with MCT801D intelligent module, which can accomplish to rapidly switch in voltage-controlled gears based on the inductive load. Its output current is continuous with no impact, no over-voltage and voltage-drop, which can achieve the high performance and high reliability.

Dietary Vitamin and Stability of Oral Anticoagulation: Proposal of a Diet with Constant Vitamin K1 Content

1997 ◽  
Vol 77 (03) ◽  
pp. 504-509 ◽  
Author(s):  
Sarah L Booth ◽  
Jacqueline M Charnley ◽  
James A Sadowski ◽  
Edward Saltzman ◽  
Edwin G Bovill ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Vitamin K ◽  
High Performance ◽  
Case Reports ◽  
Food Composition ◽  
Dietary Guidelines ◽  
Dietary Vitamin ◽  
Vitamin K1 ◽  
The Stability ◽  
The Impact

SummaryCase reports cited in Medline or Biological Abstracts (1966-1996) were reviewed to evaluate the impact of vitamin K1 dietary intake on the stability of anticoagulant control in patients using coumarin derivatives. Reported nutrient-drug interactions cannot always be explained by the vitamin K1 content of the food items. However, metabolic data indicate that a consistent dietary intake of vitamin K is important to attain a daily equilibrium in vitamin K status. We report a diet that provides a stable intake of vitamin K1, equivalent to the current U.S. Recommended Dietary Allowance, using food composition data derived from high-performance liquid chromatography. Inconsistencies in the published literature indicate that prospective clinical studies should be undertaken to clarify the putative dietary vitamin K1-coumarin interaction. The dietary guidelines reported here may be used in such studies.

Alpha Tocopherol Loaded in Liposome: Preparation, Optimization, Characterization and Sperm Motility Protection

2020 ◽  
Vol 10 (3) ◽  
pp. 228-236 ◽  
Author(s):  
Lamia Taouzinet ◽  
Sofiane Fatmi ◽  
Allaeddine Khellouf ◽  
Mohamed Skiba ◽  
Mokrane Iguer-ouada
Keyword(s):  
Vitamin E ◽  
Sperm Motility ◽  
High Performance ◽  
Positive Impact ◽  
Alpha Tocopherol ◽  
Ethanol Injection ◽  
Liposome Preparation ◽  
Liposome Size ◽  
Optimum Solution ◽  
The Impact

Background: Alpha-tocopherol is a potent antioxidant involved in sperm protection particularly during cryopreservation. However, its poor solubility limits the optimal protection in aqueous solutions. Objective: The aim of this study was to enhance the solubility of α-tocopherol by the use of liposomes. Methods: The experimental approach consisted to load vitamin E in liposomes prepared by ethanol injection method and the optimization carried out by an experimental design. The optimum solution was characterized by high performance liquid chromatography and scanning electron microscope. Finely, the impact on sperm motility protection was studied by the freezing technic of bovine sperm. Results: The optimum solution was obtained when using 10.9 mg/ml of phospholipids, 1.7 mg/ml of cholesterol and 2 mg/ml of vitamin E. The liposome size was 99.86 nm, providing 78.47% of loaded efficiency. The results showed also a significant positive impact on sperm motility after hours of preservation. Conclusion: In conclusion, the current results showed the interest of liposome preparation as an alternative to enhance vitamin E solubility and to protect spermatozoa during cryopreservation.

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