Key Technology of Lifting Cushion Device Design

2019 ◽  
Vol 3 (4) ◽  
pp. 28
Author(s):  
Fei Lu ◽  
Fan Chen ◽  
Qianye Zhang
Keyword(s):  
Structural Instability ◽  
Structural System ◽  
Device Design ◽  
Implementation Plan ◽  
Key Technology ◽  
Overall Design ◽  
Safety And Reliability ◽  
Assembly Technology ◽  
Instability Control

<p>To reduce inertia brake role in the process of ascension, this paper puts forward a new kind of improve buffer device, involving the overall design of the structural system, key technology and implementation plan. Including parts production and assembly technology, based on the technical advancement and reliability of the research. Ensure the safety and reliability of the device, solve the problem of structural instability control during the lifting process and have good engineering benefits.</p>

Preliminary Ideas of the Metro Station Constructed by Shield Tunneling Method Combined with Prefabricated Method

2014 ◽  
Vol 580-583 ◽  
pp. 1013-1018 ◽  
Author(s):  
Hui Feng Su ◽  
Wei Ning Liu ◽  
Fu Chun Liu
Keyword(s):  
The Other ◽  
Shield Tunnel ◽  
Spring Stiffness ◽  
Underground Engineering ◽  
Shield Tunneling ◽  
Metro Station ◽  
Key Technology ◽  
Tunneling Method ◽  
Assembly Technology ◽  
Northeast Of China

Confronting with the difficulties of the construction metro station in the Northeast of China, a new idea of shield method combined prefabricated method is put forward. In the paper the research status of the underground engineering precast assembly technology was analyzed and classified firstly. The method of single round interval shield combined with open-cut (or covered excavation) prefabricated sections and on the basis of shield tunnel to build single arch station is especially worth studying and promotion. Then the key prefabricate theory needing to deal with such as how to calculating the spring stiffness and so forth of the calculating model. The key technology such as joint formation, waterproof and the other of shield method combined with prefabricated method was discussed.

Development of Post Processor for Dual-Spindle Turning Center

2014 ◽  
Vol 541-542 ◽  
pp. 804-807
Author(s):  
An Jiang Cai ◽  
Fang Rong Ma ◽  
Ming Wei Ding ◽  
Shi Hong Guo
Keyword(s):  
Structural System ◽  
Post Processing ◽  
Technical Problems ◽  
Key Technology ◽  
Nc Programming ◽  
Mechanical Products ◽  
Processing Modes ◽  
Turning Center ◽  
Efficient Processing

This paper takes dual-spindle turning center as the research object, researching on the key technology of the efficient processing and integration application, the special post processor for dual-spindle turning center was developed based on the IMSPOST, the technical problems of dual-spindle structural system and post processing algorithm for varies of processing modes were solved, the NC processing programs were generated effectively and correctly. Production application showed that: the development of post processor for dual-spindle turning center improves the automation level and quality of NC programming effectively, brings the processing capability of dual-spindle turning center full play, and provides technical support for the manufacturing of complex mechanical products.

Stabilization of the Chernobyl Shelter

2001 ◽  
Vol 215 (1) ◽  
pp. 1-11
Author(s):  
I. D. Heriot
Keyword(s):  
Risk Management ◽  
Project Management ◽  
Financial Support ◽  
Structural Instability ◽  
High Radiation ◽  
Implementation Plan ◽  
Technology Project ◽  
Radiation Fields ◽  
Environmental Threat ◽  
The Many

The Shelter enclosing the wrecked Chernobyl Unit 4 reactor continues to deteriorate posing an increasing environmental threat due to structural degradation and the ingress of water. The uncertain nature of the wreckage within the Shelter combined with structural instability and high radiation fields make the remediation a very challenging task. A decision-based approach known as the Shelter Implementation Plan (SIP) has been adopted as a way of resolving the many difficulties. This plan has the financial support of more than 20 nations under the Chernobyl Shelter Fund (CSF) which is administrated by the European Bank for Reconstruction and Development (EBRD). Project execution will pose a number of unique problems in technology, project management, contracting, nuclear regulation and risk management.

Finite Element Analysis and Optimization for the Structure of NC Forming Machine

2014 ◽  
Vol 945-949 ◽  
pp. 166-173
Author(s):  
Li Min Liu ◽  
Zhong De Shan ◽  
Feng Liu
Keyword(s):  
Finite Element ◽  
Structural Design ◽  
Numerical Control ◽  
Fundamental Function ◽  
Element Analysis ◽  
Main Structure ◽  
Overall Design ◽  
Safety And Reliability ◽  
Processing Module ◽  
Finite Element Numerical Simulation

Numerical control (NC, for short) forming machine is kind of digital forming equipment, which is based on the development of manufacturing technology without pattern, and can get mold by processing module directly, and its mechanical structure is mainly composed of the main structure, moving system, tool system and other components. The main structure is not only the foundation and framework of the entire machine, but also the most important component bearing pressure. The moving system is the most critical part of forming machine to achieve its fundamental function. Therefore, the design and development of the main structure and moving system have directly impact on the performance and service life of the forming machine, which is an important factor to reflect the level of the overall design. In this paper, structural static analysis of the main structure and moving system was made through finite element numerical simulation, the more reasonable scheme was optimized, by which the safety and reliability of forming machine was ensured. The research results can provide the necessary technical support for the structural design of NC forming machine.

Design of Conversion Circuit for Intellect Vortex Flow-Meter

2013 ◽  
Vol 336-338 ◽  
pp. 33-37
Author(s):  
Xing Zhe Piao ◽  
Hai Yin Piao ◽  
Song Yang
Keyword(s):  
Vortex Flow ◽  
System Development ◽  
Pulse Signal ◽  
Design Principles ◽  
Design Requirement ◽  
Flow Meter ◽  
Implementation Plan ◽  
Key Technology ◽  
The Core ◽  
Hardware Circuit

The design principles of conversion circuit for intellect vortex flow-meter with MSP430 microcontroller used as the core was described in detail. The implementation plan of system development was confirmed based on the analyzing of the key technology of vortex flow-meter, which collected and processed the pulse signal from the pre-amplified circuit and sent to the module of D/A conversion converted into standard 4 ~ 40 mA output. The key of the design of hardware circuit and implementation of software was stated. The result tested and approved by the site shows that the technology index has met the design requirement with the character of reliability, which solves the problem of the large wastage of power and low stability. Its performance can be comparable with that of the same import products and its cost is much lower. It has a broad market prospect.

Main Drive Vehicle of Two-Stage Driving Axle Design

2013 ◽  
Vol 380-384 ◽  
pp. 12-16
Author(s):  
Hao Hu ◽  
Ying Min Yan
Keyword(s):  
Reference Model ◽  
Three Dimensional ◽  
Basic Structure ◽  
Double Reduction ◽  
Two Stage ◽  
Overall Design ◽  
Programme Design ◽  
Assembly Technology ◽  
Drive Axle ◽  
Final Drive

In this paper, the overall requirements for the design of the drive bridge is analysed, the programme of the structure on the drive axle assembly and component parts is studied. The overall design and programme design on the drive axle assembly is finished; the basic structure of the double reduction final drive and the middle tandem axle is ensured which refers to the structure of the reference model CA1092; The basic components on the drive axle assembly are designed. The calculation of their basic geometric parameters is finished, and the strength of the parts which have greater impact on the overall strength is checked; and the remaining components are designed briefly. The paper gave a briefing on the characteristics of Solidworks 2008 software and virtual assembly technology. Introduces three-dimensional maps of parts which are draw by SolidWorks software and describes drive axle assembly by the form of diagrams.

Construction Technique of Cast In Situ RC Grillage Shear Wall Building Formed with Thermal Insulation Hollow Blocks

2014 ◽  
Vol 919-921 ◽  
pp. 39-44 ◽  
Author(s):  
Wei Jing Zhang ◽  
Qian Zhang ◽  
Pei Ru Fu
Keyword(s):  
Reinforced Concrete ◽  
Thermal Insulation ◽  
Shear Wall ◽  
Structural System ◽  
Construction Technique ◽  
Load Bearing ◽  
Key Technology ◽  
New Type ◽  
Wall System

The cast-in-situ reinforced concrete grillage shear wall system with non-dismantling formwork is a new type of structural system characterized by load-bearing and thermal insulation, and the research on the construction technique is crucial to its promotion and application. Combined with the pilot building, the key technology and construction measures are introduced in this paper, which can provide reference for the related projects in future.

Ball SAW Sensors for Safety and Reliability of Fuel Cell Technologies

2006 ◽  
Vol 321-323 ◽  
pp. 48-52 ◽  
Author(s):  
Kazushi Yamanaka
Keyword(s):  
Hydrogen Gas ◽  
Hydrogen Sensors ◽  
Key Technology ◽  
Saw Sensor ◽  
Sensitive Film ◽  
Safety And Reliability ◽  
Ball Surface ◽  
Collimated Beam ◽  
Free Propagation ◽  
Ball Saw Sensor

Detection of hydrogen gas is a crucial task for establishing safety and reliability of fuel cells, a key technology for the environment and our society. However, hydrogen is difficult to detect and various hydrogen sensors have many drawbacks. Here we report a novel hydrogen gas sensor, the ball surface acoustic wave (SAW) sensor, using Pd or PdNi sensitive film. The ball SAW sensor is based on a novel phenomenon, diffraction-free propagation of collimated beam along an equator of sphere. The resultant ultra-multiple roundtrips of SAW makes it possible to achieve highest sensitivity among SAW sensors. Moreover, it enables to use a very thin sensitive film, and consequently the shortest response time (2s) was realized. In terms of the sensing range, it has the widest range of 10 ppm to 100 % among any hydrogen sensors including FET or resistivity sensors. The ball SAW sensor can be applied not only to hydrogen but also to any gasses and possibly to liquids.

Design and Realization of the Computer Network Traffic Monitoring

2014 ◽  
Vol 926-930 ◽  
pp. 2297-2300
Author(s):  
Yun Peng Zhang
Keyword(s):  
Monitoring System ◽  
Network Traffic ◽  
Computer Network ◽  
Traffic Monitoring ◽  
Status Quo ◽  
Point Of View ◽  
Key Technology ◽  
Overall Design ◽  
Topological Design ◽  
Network Traffic Monitoring

This paper studies the computer network traffic related subjects background first, and analyzes the research status quo of network traffic monitoring, putting forward the main content and the research target. This paper introduces the key technology, network traffic monitoring system for the topological design and analysis of computer network traffic monitoring system, computer network traffic monitoring system for the overall design, network traffic monitoring has been basically achieved demand. From the point of view of network users and network operators, network traffic monitoring can improve the scientific and rationality of network management having important research value.

Design of Three-Phase Multi-Function Energy Meter Based on Measurement Chip RN8302

2012 ◽  
Vol 226-228 ◽  
pp. 1888-1891
Author(s):  
Xu Hui Zhang ◽  
Jia Liu ◽  
Zeng Ji Cheng
Keyword(s):  
High Performance ◽  
Reactive Power ◽  
Low Voltage ◽  
Single Chip ◽  
Overall Design ◽  
Energy Meter ◽  
Three Phase ◽  
Power Line Carrier Communication ◽  
Safety And Reliability ◽  
The Cost

According to the development status of the energy meter, we put forward a design of a Three-phase multi-function energy meter based on professional measurement chip RN8302 and High-performance single chip microcomputer MSP430 in this article. It has the characteristics which are low-power consumption, high-precision and electricity anti-theft. It could also real-time measured current, voltage, active power, reactive power, power factor, over-voltage and over-current signal. The design also has the functions of surge prevention, lightning prevention and voltage protection, improving the overall safety and reliability of the system.Use the Low-voltage power line carrier communication, there is no need to build another peripherals,saving the cost of grid investment. The article also gave the overall design scheme and the main hardware principle Schematic.

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