The reciprocating motion characteristics of nanofluid inside the piston cooling gallery

2015 ◽  
Vol 274 ◽  
pp. 402-417 ◽  
Author(s):  
Peng Wang ◽  
Jizu Lv ◽  
Minli Bai ◽  
Gang Li ◽  
Ke Zeng
Keyword(s):  
Reciprocating Motion ◽  
Motion Characteristics ◽  
Piston Cooling

Theory Research on Full Metal Single Screw Pump

2013 ◽  
Vol 345 ◽  
pp. 233-237
Author(s):  
Ben Liang Yu ◽  
Jun Fei Wu ◽  
Ying Yu
Keyword(s):  
Flow Rate ◽  
Theoretical Basis ◽  
Theoretical Research ◽  
Reciprocating Motion ◽  
Screw Pump ◽  
Single Screw ◽  
Rotor Profile ◽  
Motion Characteristics ◽  
Theory Research

This paper first studied the feasibility in application and advantages of the the full metal single screw pump by the method of theoretical research . Then the paper deducted the motion characteristics of the rotor around the stator and flow rate of the metal single screw pump .It is pointed that the center of the rotor profile is always located in the long shaft of the section of stator in any section .As the rotor rotates, the center of the rotor profile on this section takes straight reciprocating motion along the long axis of stator section .The results indicate that it exists feasibility in the designing and processing of full metal single screw pump. Thereby it provides theoretical basis for the application of full metal screw pump.

Direct-Drive Differential Volume Control Electro-Hydraulic Servo Control System

2013 ◽  
Vol 433-435 ◽  
pp. 991-994
Author(s):  
Zhu Xin Zhang ◽  
Tuo Jia
Keyword(s):  
Control System ◽  
Dynamic Performance ◽  
Hydraulic Cylinder ◽  
Servo Control ◽  
Volume Control ◽  
Direct Drive ◽  
Reciprocating Motion ◽  
Servo Control System ◽  
Hydraulic Servo ◽  
Motion Characteristics

Direct-drive volume control electro-hydraulic servo control system, derivation model of single-rod hydraulic cylinder system, pointed out that when the reciprocating motion characteristics are inconsistent. In order to solve this problem, proposed direct-drive differential volume control electro-hydraulic servo system design of its control system and analysis of system models. Through theoretical analysis, validate this proposed direct-drive bad dynamic volume control system, symmetric dynamic performance, improving control system reliability.

Research on High Power Direct Drive Differential Volume Control Electro-Hydraulic Servo System

2013 ◽  
Vol 423-426 ◽  
pp. 2865-2868
Author(s):  
Zhu Xin Zhang ◽  
Xin Yun Xu
Keyword(s):  
High Power ◽  
Servo System ◽  
Volume Control ◽  
Direct Drive ◽  
Reciprocating Motion ◽  
Hydraulic Servo ◽  
High Response Frequency ◽  
Hydraulic Servo System ◽  
Motion Characteristics ◽  
High Output

For traditional direct drive volume control electro-hydraulic servo system, the servo motors rotary inertia is limited strictly, the speed of response is slow and the actuators reciprocating motion characteristics are not consistent. In order to solve these problems, this paper designs a kind of high power direct drive differential volume control electro-hydraulic servo system. It is instructive for design of hydraulic system which demands high output power, changes direction of motion frequently, needs high response frequency and requires the speed of reciprocating motion keep consistent.

Influence of Reciprocating Motion on Heat Transfer Inside a Ribbed Duct with Application to Piston Cooling in Marine Diesel Engines

1997 ◽  
Vol 41 (04) ◽  
pp. 332-339
Author(s):  
S. W. Chang ◽  
L. M. Su
Keyword(s):  
Heat Transfer ◽  
Cooling System ◽  
Duct Flow ◽  
Reciprocating Motion ◽  
Heat Transfer Characteristics ◽  
Enhanced Heat Transfer ◽  
Cooling Performance ◽  
Marine Diesel ◽  
Heat Transfer Improvement ◽  
Piston Cooling

This paper presents the results of an experimental study aimed at investigating the effect of reciprocating motion on the heat transfer for the flow inside a square ribbed enclosure. This flow configuration was a modification of the modern cooling system within a reciprocating piston of a marine heavy diesel engine. Initially, the heat transfer characteristics for the ribbed duct flow were examined and validated by comparing the present data with the relevant publications. Significant heat transfer enhancements detected from the nonreciprocating forced convection tests suggested the potential for heat transfer improvement using ribbed coolant channel. For the shaking effect on the cooling performance of the ribbed enclosure, a heat transfer impediment near which the thermal boundary layers were initiated was found when the reciprocating force was relatively low. Further increase of the reciprocating force or the level of heating power enhanced heat transfer. At the highest reciprocating speed tested, the heat transfer could be increased to a level about 145% of the equivalent stationary case. This study clarified that the circular ribs could be added inside the cooling passages in order to improve the cooling performance of the piston.

Experimental Investigation of aluminum doping crumb rubber/epoxy composite in reciprocating motion

2015 ◽  
Vol 3 ◽  
pp. 1
Author(s):  
Goutam Chandra Karar ◽  
Nipu Modak
Keyword(s):  
Experimental Investigation ◽  
Coefficient Of Friction ◽  
Epoxy Composite ◽  
Normal Load ◽  
Crumb Rubber ◽  
The Other ◽  
Reciprocating Motion ◽  
Molding Process ◽  
Friction Tester ◽  
The Coefficient Of Friction

The experimental investigation of reciprocating motion between the aluminum doped crumb rubber /epoxy composite and the steel ball has been carried out under Reciprocating Friction Tester, TR-282 to study the wear and coefficient of frictions using different normal loads (0.4Kg, 0.7Kgand1Kg), differentfrequencies (10Hz, 25Hz and 40Hz).The wear is a function of normal load, reciprocating frequency, reciprocating duration and the composition of the material. The percentage of aluminum presents in the composite changesbut the other components remain the same.The four types of composites are fabricated by compression molding process having 0%, 10%, 20% and 30% Al. The effect of different parameters such as normal load, reciprocating frequency and percentage of aluminum has been studied. It is observed that the wear and coefficient of friction is influenced by the parameters. The tendency of wear goes on decreasing with the increase of normal load and it is minimum for a composite having 10%aluminum at a normal load of 0.7Kg and then goes on increasing at higher loads for all types of composite due to the adhesive nature of the composite. The coefficient of friction goes on decreasing with increasing normal loads due to the formation of thin film as an effect of heat generation with normal load.

scholarly journals Influence of motion characteristics of dual stealth aircraft on monopulse radar performance

2020 ◽  
Vol 1676 ◽  
pp. 012222
Author(s):  
Lei Bao ◽  
Chun-yang Wang ◽  
Tao-dong ◽  
Juan Bai ◽  
Sheng-Jun Wei ◽  
...  
Keyword(s):  
Motion Characteristics

scholarly journals Research on Measurement Method of Parachute Scanning Platform Based on MEMS Device

Micromachines ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 402
Author(s):  
Ning Liu ◽  
Tianqi Tian ◽  
Zhong Su ◽  
Wenhao Qi
Keyword(s):  
Physical Simulation ◽  
Inertial Sensors ◽  
Rotational Velocity ◽  
Attitude Measurement ◽  
Matlab Simulation ◽  
Scanning Angle ◽  
Reduce Development Time ◽  
Motion Parameters ◽  
Motion Characteristics ◽  
Scanning Motion

This paper studies the measurement of motion parameters of a parachute scanning platform. The movement of a parachute scanning platform has fast rotational velocity and a complex attitude. Therefore, traditional measurement methods cannot measure the motion parameters accurately, and thus fail to satisfy the requirements for the measurement of parachute scanning platform motion parameters. In order to solve these problems, a method for measuring the motion parameters of a parachute scanning platform based on a combination of magnetic and inertial sensors is proposed in this paper. First, scanning motion characteristics of a parachute-terminal-sensitive projectile are analyzed. Next, a high-precision parachute scanning platform attitude measurement device is designed to obtain the data of magnetic and inertial sensors. Then the extended Kalman filter is used to filter and observe errors. The scanning angle, the scanning angle velocity, the falling velocity, and the 2D scanning attitude are obtained. Finally, the accuracy and feasibility of the algorithm are analyzed and validated by MATLAB simulation, semi-physical simulation, and airdrop experiments. The presented research results can provide helpful references for the design and analysis of parachute scanning platforms, which can reduce development time and cost.

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