Structure design of a conic lens pair for improving the transmission efficiency of a Cassegrain antenna

. The slippage often occurs between conveyor belt and driving drum, reduces the transmission efficiency and even causes accidents due to lack of enough friction. By the analysis of friction drive principle in belt conveyor, three ways were presented to increase the frictional traction. Learning from the bionic tribology theory, we proposed a new structure design of the drum coating layer surface. The micro contact area of fly's seta that can adhere to any surface was taken as a prototype, and its microscopic structure was analyzed, then the surface structure of coating layer with recess long blocks was designed, finally, the solid modeling was created with CAD software. The new surface has sub atmospheric pressure absorption. The purpose is to increase the friction between conveyor belt and driving drum, and to avoid the slippage.

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Structure Design and Experimental Study of Pin-Cycloidal Planetary Reducer for the Pitch of High-Power Wind Turbine

CONVERTER ◽

10.17762/converter.111 ◽

2021 ◽

pp. 756-764

Author(s):

Lu Qi, He Weidong

Keyword(s):

Wind Turbines ◽

High Power ◽

Design Theory ◽

Production Capacity ◽

Transmission Efficiency ◽

Structure Design ◽

Transformation Mechanism ◽

New Type ◽

Wind Power Industry ◽

Pitch System

In recent years, with the development of manufacturing technology and production capacity, wind power industry has been developed rapidly.A new type of pin-cycloidal planetary reducer was proposed in this studyfor the actuator of the pitch of high-power wind turbines. Based on the transformation mechanism method, the transmission efficiency of the reducer was calculated by analyzing the pin-cycloidal meshing efficiency, bearing efficiency, and output mechanism efficiency. Prototype testing were combined to systematically and deeply study the design theory of the reducer for the pitch of high-power wind turbines. Finally, a new design was proposed for a reliable two-stage pin-cycloidal planetary reducer with a strong bearing capacity and multi-tooth meshing on the hard gear surface that can be applied to the pitch system of high-power wind turbines.

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Parametric Design of Key Components in Downhole Motor

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.620.187 ◽

2014 ◽

Vol 620 ◽

pp. 187-192

Author(s):

Si Zhu Zhou ◽

Hao Yong Zeng

Keyword(s):

Parametric Design ◽

Transmission Efficiency ◽

Structure Design ◽

Original Model ◽

Rotary Drilling ◽

Series Design ◽

Higher Power ◽

Design Cycle ◽

Downhole Tool ◽

In Series

Downhole motor is an instrument to drill oil wells, different from rotary drilling in working methods. While downhole motor works, the drilling stem of which remains still supplies power to bits directly so that a much higher transmission efficiency of power can be achieved. Downhole motor has been a key developing downhole tool recently. It is installed in a limited space with a certain diameter, asking for a higher power, so the design of which is rather difficult. This paper mainly studies the key components of downhole motor in structure design and its working characteristics. And parametric design employed in series design to shorten design cycle is presented in this paper. After taken Solidworks as a basic software platform and turbodrill turbine section with diameter of 245mm as an original model, parametric design of key components in downhole motor has been achieved by setting the parameters of key components, adding relations, editing program, creating a new part etc. Parametric design methods presented in this paper has already been applied in series design of downhole motor at Yangtze University.

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Designing of Internet of Things Sensor Based Information Gateway Using SDN Concept

International Journal of Distributed Systems and Technologies ◽

10.4018/ijdst.2019010102 ◽

2019 ◽

Vol 10 (1) ◽

pp. 13-24

Author(s):

Bin Li ◽

Xin Sun ◽

Shi Yu

Keyword(s):

Internet Of Things ◽

Sensor Network ◽

Transmission Efficiency ◽

Structure Design ◽

The Internet ◽

Public Network ◽

Data Packets ◽

Gateway System ◽

And Function ◽

The Internet Of Things

In order to make the gateway of the Internet of things access to the public network effectively, using a Software-Defined Network (SDN) concept, a sensor network was studied. When performing hierarchical design, the gateway of the Internet of things was layered. It was divided into the policy layer and the forwarding layer. The policy layer distributed the policy, to receive instructions from the upper server. At the same time, it managed the nodes and matches the forwarding rules. The forwarding layer is only responsible for forwarding data packets. This control and data flow separation structure could effectively improve the system transmission efficiency. At the same time, the software structure design and hardware design of the sensor gateway of the Internet of things were given. The design and function of the gateway was analyzed and studied. A comprehensive solution of the gateway system was proposed. The results showed that this method could further improve the performance of the sensor network gateway. Therefore, the design of the Internet of things sensing information gateway based on the concept of SDN has a high practical value.

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The Design of Test Bench for Transmission Efficiency of Automobile Driveline

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.328.22 ◽

2013 ◽

Vol 328 ◽

pp. 22-27 ◽

Cited By ~ 1

Author(s):

De Ping Zhang ◽

Yi Min Mo

Keyword(s):

Theoretical Analysis ◽

Test Bench ◽

Transmission Efficiency ◽

Structure Design ◽

Modular Structure ◽

The Past ◽

Automotive Transmission ◽

Testing Data ◽

Test Technology

To solve the problem of lacking tools for efficiency testing in the process of automotive driveline optimization, a test bench was developed on the basis of adequate study on the properties of the structure of automobile driveline. Using the test technology to carry out efficiency research of automotive driveline, can not only verify the theoretical analysis, but also find an effective way to improve the efficiency of automotive driveline through the processing of testing data. In the past, most of the research for driveline efficiency is limited to the study of automotive transmission, and it is seldom acceptable to take the entire driveline as the research object to study. Adopting modular structure design, this test bench can not only be used to test the efficiency of entire automobile driveline, but also be used to test the efficiency of single components. Testing results shows that the precision of the test bench has achieved the anticipated goal, and the test bench has the advantages of convenient installation and high automation degree, etc.

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