Study on Walking System Technology of Crawler Combine Harvester

2014 ◽  
Vol 1037 ◽  
pp. 107-110 ◽  
Author(s):  
Xi Yin Lou
Keyword(s):  
Production Efficiency ◽  
High Efficiency ◽  
Hydraulic Drive ◽  
Planetary Gear ◽  
Drive System ◽  
Mechanical Transmission ◽  
Speed Increase ◽  
Speed Regulation ◽  
Combine Harvester ◽  
And Control

Crawler combine harvester walking system is various transmission technology are organic and reasonable matching, foster strengths and circumvent weaknesses, complementary drive system so as to achieve the best overall. Stepless speed walking is particularly suitable for complex condition changes, the demand of drive system for a more comprehensive, more comprehensive, objective stepless speed walking in transmission system innovation or seek better performance, and as a mechanical transmission device of the planetary gear has the advantages of small volume transfer large torque, high efficiency. The combination of both realizes stepless transmission, and has the advantages of low speed and high torque. Hydraulic drive system is mainly to achieve stepless speed regulation, commutation, planetary gear drive mainly reduce speed, increase the torque to. Composite transmission mode that can greatly improve the transmission ability, expand the scope of speed adjustment. In fact, combine the stepless variable speed running and control technology can greatly improve the performance of the product, especially the effect on production efficiency, durability, controllability, environment adaptability, green characteristics were significantly.

Study on the Design of Composite Transmission System for Crawler Type Full-Feeding Combine Harvester

2014 ◽  
Vol 722 ◽  
pp. 80-83
Author(s):  
Xi Yin Lou
Keyword(s):  
High Efficiency ◽  
Fast Response ◽  
Continuous Variable ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Variable Speed ◽  
Hydraulic Motor ◽  
Speed Regulation ◽  
Full Load Operation ◽  
Combine Harvester

Transmission system is an important part of combine harvester, and is the main indicator to measure the level of technology. This paper presents the design of a composite hydraulic mechanical transmission system for combine harvester. The system consists of engine, variable pump, quantitative hydraulic motor, planetary reducer, driving wheel, crawler etc. Author analyzes the continuous variable speed regulation characteristics of transmission; determines selection method of hydraulic components and mechanical parameters. Composite transmission system can make the engine is close to full load operation, improve combine harvester productivity and fuel economy. By optimizing the transmission system, combine harvester can reduce speed, increases the torque, realizes continuous variable speed. Practice has proved: this dynamic composite transmission system with fast response, high efficiency, and reliable, low failure rate. At the same time, combine harvester has the advantages of simple operation, forward, backward or turning without shifting, greatly reduce the labor intensity of the operator.

Design of Steering Wheel Control System of Tracked Vehicle of Hydro-Mechanical Differential Turning

2012 ◽  
Vol 472-475 ◽  
pp. 753-756
Author(s):  
Fu Yi Cao ◽  
Zhi Li Zhou ◽  
Hong Jie Zhao
Keyword(s):  
Control System ◽  
Power Flow ◽  
High Efficiency ◽  
Steering Wheel ◽  
Mechanical Transmission ◽  
Tracked Vehicle ◽  
Scheme Design ◽  
Speed Regulation ◽  
New Type ◽  
Turning Mechanism

The hydro-mechanical differential turning mechanism is the new type of double power flow turning mechanism of tracked vehicle. The hydraulic stepless speed regulation and the high efficiency of mechanical transmission are integrated into the turning mechanism. The stepless turning of tracked vehicle can be achieved. Basing on hydro-mechanical differential turning theory, the scheme design of steering wheel control system of tracked vehicle of hydro-mechanical differential turning is finished. By establishing model of steering wheel control system, its working stability and following characteristic is simulated and analyzed in this paper. The demand of hydro-mechanical differential turning of tracked vehicle can be realized by the steering wheel control system designed through the simulation results.

Efficiency Analysis on Hydro-Mechanical Transmission

2014 ◽  
Vol 1037 ◽  
pp. 216-220
Author(s):  
Zhen Zhu ◽  
Xiang Gao ◽  
Dao Yuan Pan ◽  
Yu Zhu
Keyword(s):  
Motor System ◽  
Planetary Gear ◽  
Efficiency Analysis ◽  
Mechanical Transmission ◽  
Peak Efficiency ◽  
Hydraulic Power ◽  
Average Efficiency ◽  
Hydrostatic Transmission ◽  
Calculating Method ◽  
Speed Regulation

In order to study the efficiency on hydro-mechanical transmission (HMT),this paper analyses the stepless speed regulation characteristic,torque characteristic and hydraulic power distributing characteristic of HMT.According to the calculating method of efficiency of the closed pump-motor system and planetary gear,the approximate efficiency formulas of HMT were established.The result shows that:the efficiency of HMT is much higher than that of hydrostatic transmission (HST),the peak efficiency of HMT can reach about 90% and the average efficiency of HMT can exceed more than 80%.

Application and Control of Brushless DC Motor for Electric Vehicle

2013 ◽  
Vol 724-725 ◽  
pp. 1398-1401
Author(s):  
Da Fang Wang ◽  
De Ming Bu ◽  
Cheng Zhu ◽  
Chuan Wei Zhou
Keyword(s):  
Electric Vehicle ◽  
High Efficiency ◽  
Torque Ripple ◽  
Dc Motor ◽  
Drive System ◽  
Brushless Dc Motor ◽  
Brushless Dc ◽  
Power Drive ◽  
Basic Power ◽  
And Control

Brushless DC motor has simple structure, great power density, torque output and high efficiency. It has a broad application prospect for electric vehicle. The conventional scheme of BLDCM drive system adopts motor ontology, power drive circuits and position sensor. BLDCM is usually used with the mode of 3-phase 6-state PWM. Due to its structure and commutation strategy, it has many problems to be solved if works on electric vehicle. The basic operating principle of Brushless DC motor and the basic power drive system was discussed. In addition, investigated the torque ripple, flux-weakening speed control and brake energy regeneration for electric vehicle. Solving these problems can promote BLDCM and electric vehicle industry.

Application of Tracked Combine Harvester Step-Less Speed Regulated System

2014 ◽  
Vol 904 ◽  
pp. 365-367
Author(s):  
Xi Yin Lou
Keyword(s):  
High Efficiency ◽  
High Reliability ◽  
Control Valve ◽  
Regulation System ◽  
Hydraulic Motor ◽  
Hydraulic Pump ◽  
Compact Structure ◽  
Speed Regulation ◽  
Walking Machines ◽  
Combine Harvester

In this paper, Step-less speed regulation system using double reversible variable pump and double quantitative motor, since the middle of no other control valve, the hydraulic pump and hydraulic motor with high efficiency. To meet the tracked combine and walking machines because of their own characteristics has the advantages of compact structure, light weight, high efficiency, high reliability, and other requirements of the system..

Design Improvement for a Planetary Gear System in Hydraulic Drive System

2016 ◽  
Vol 33 (10) ◽  
pp. 851-856
Author(s):  
Yoo In Shin ◽  
Chan Heon Yoon ◽  
Sung Gil Han ◽  
Seong Gyu Park ◽  
Chul Ki Song
Keyword(s):  
Hydraulic Drive ◽  
Planetary Gear ◽  
Drive System ◽  
Gear System ◽  
Design Improvement ◽  
Planetary Gear System

Research of Track-Type Full Feeding Combine Harvester Walking Design Scheme Based on Hydraulic Close System

2014 ◽  
Vol 697 ◽  
pp. 187-189
Author(s):  
Xi Yin Lou
Keyword(s):  
Power Transmission ◽  
Engineering Application ◽  
Weight Ratio ◽  
Hydraulic Pump ◽  
Power Matching ◽  
Speed Regulation ◽  
Closed Type ◽  
Combine Harvester ◽  
Key Techniques ◽  
And Control

Hydraulic technology is one of the key techniques of modern transmission and control. Closed type hydraulic power transmission system is weight ratio, fast action, easy to realize the advantages of flexible stepless speed regulation, flexible power transmission. In this paper, the closed hydraulic system of double bidirectional variable hydraulic pump and the bidirectional quantitative motor, the drive system for crawler type machinery, advantages, in the walking system design process can reasonable calculation and power matching, reasonable selection of power components, the universal value of engineering application.

scholarly journals Increase the Efficiency of an Induction Motor Feed from Inverter for Low Frequencies by Combining Design and Control Improvements

Energies ◽  
2022 ◽  
Vol 15 (2) ◽  
pp. 530
Author(s):  
Maria Dems ◽  
Krzysztof Komeza ◽  
Jacek Szulakowski ◽  
Witold Kubiak
Keyword(s):  
Energy Savings ◽  
High Efficiency ◽  
Open Loop ◽  
Design Parameters ◽  
Optimal Size ◽  
Low Frequencies ◽  
Field Weakening ◽  
Speed Regulation ◽  
Wide Range ◽  
And Control

Speed-controlled induction motors have the most significant potential for energy savings. The greatest problems with obtaining high efficiency occur in motors with a wide range of rotational speed regulation, as in the motors for driving industrial washing machines under consideration. While for the highest speeds, the dominant phenomenon is at field weakening. The problem is obtaining the optimal size of the magnetic flux for low rotation speed to prevent excessive saturation increasing current, and reduction of efficiency. This problem is usually solved by selecting the appropriate control for an already built machine. The authors propose a combination of activities when designing the motor structure with the selection of proper control, which allows for high efficiency. Since the drive does not require precise speed control or obtaining the required dynamics, it was possible to use an inexpensive control in an open loop, avoiding the cost of transmitters. Furthermore, the number of design parameters that are subject to change is significantly limited by technological factors and the available space in the washing machine. Proper parameter selection was made using a peripheral method assisted by field-circuit simulations. The proposed approach can be used in designing structures and selecting motors controls for other applications.

Optimal parameters design method for power reflux hydro-mechanical transmission system

2018 ◽  
Vol 233 (3) ◽  
pp. 585-594 ◽  
Author(s):  
Qiao Zhang ◽  
Dongye Sun ◽  
Datong Qin
Keyword(s):  
High Efficiency ◽  
Automatic Transmission ◽  
Planetary Gear ◽  
Torque Converter ◽  
Transmission System ◽  
Speed Ratio ◽  
Structural Parameter ◽  
Mechanical Transmission ◽  
Power Performance ◽  
Starting Torque

To ensure the starting torque ratio while improving the efficiency of the automatic transmission system, a power reflux hydro-mechanical transmission system which consists of a torque converter, a planetary gear, and two gearboxes is proposed. First, the properties of the speed ratio, torque ratio, efficiency, and capacity in the power reflux hydro-mechanical transmission system are modeled. Then, the non-dominated sorting genetic algorithm II is used to optimize the structural parameter of the planetary gear and the speed ratio of the gearbox T1, with the speed ratio width in the high-efficiency area, efficiency, and power performance acting as target functions. Moreover, the method of selecting the specific torque converter for the power reflux hydro-mechanical transmission system is proposed. Results show that the starting torque ratio of the power reflux hydro-mechanical transmission system increases to 4.87 and the equivalent efficiency in high-efficiency area of the power reflux hydro-mechanical transmission system reaches to 90.87%. Therefore, the power reflux hydro-mechanical transmission system can reach higher efficiency while ensuring the starting torque ratio compared with hydro-mechanical power split transmission, which can significantly reduce fuel consumption once applied to the construction vehicle.

Research on Backlash Nonlinearity in Servo Precision Drive System

2013 ◽  
Vol 462-463 ◽  
pp. 815-819
Author(s):  
Wei Zhou ◽  
Ling Zhao ◽  
Xiao Lun Li ◽  
Li Hong Lin
Keyword(s):  
Mutual Coupling ◽  
Engineering Application ◽  
Drive System ◽  
Smooth Transition ◽  
Mechanical Transmission ◽  
Safe Operation ◽  
Coupling Vibration ◽  
Mechanical Coupling ◽  
And Control ◽  
Backlash Nonlinearity

Servo Precision Drive system is mainly composed of servo motor, mechanical transmission parts and control parts. Because of mutual coupling between various parts, particularly transmission system in mechanical coupling vibration in non-smooth transition, it will be of great harm to safe operation of the system. This paper is mainly from the perspective of backlash nonlinear characteristic and with simulation tool of Matlab/Simulink to analyze the influence of backlash on the precision of servo system, do hope the work above will have certain reference significance to actual engineering application.

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