A new hydrau-electro-mechanical transmission system with soft start-up/stepless speed regulation

2010 ◽  
Author(s):  
Fulin Wang ◽  
Huajie Xu ◽  
Jing Chen ◽  
Xujing Yang
Keyword(s):  
Transmission System ◽  
Mechanical Transmission ◽  
Speed Regulation ◽  
Soft Start ◽  
Start Up

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.

scholarly journals Soft start-up scheme for the hybrid distribution transformer

2019 ◽  
Vol 2019 (16) ◽  
pp. 1958-1961
Author(s):  
Yibin Liu ◽  
Deliang Liang ◽  
Mingkang Zhang ◽  
Yang Liang ◽  
Qixu Chen ◽  
...  
Keyword(s):  
Distribution Transformer ◽  
Soft Start ◽  
Start Up ◽  
Hybrid Distribution

scholarly journals Barrier-Free Wheelchair with a Mechanical Transmission

2021 ◽  
Vol 11 (11) ◽  
pp. 5280
Author(s):  
Jongseok Lee ◽  
Wonhyeong Jeong ◽  
Jaeoh Han ◽  
Taesu Kim ◽  
Sehoon Oh
Keyword(s):  
The Elderly ◽  
Transmission System ◽  
Motor Drives ◽  
Mechanical Transmission ◽  
Link Structure ◽  
Second Mode ◽  
Important Means ◽  
The Stability ◽  
Flat Ground ◽  
Climbing Stairs

Wheelchairs are an important means of transportation for the elderly and disabled. However, the movement of wheelchairs on long curbs and stairs is restricted. In this study, a wheelchair for climbing stairs was developed based on a mechanical transmission system that rotates the entire driving part through a link structure and an actuator to change the speed. The first mode drives the caterpillar, and the second mode drives the wheels. When driving on flat ground, it uses landing gears and wheels, and when climbing stairs, it uses the caterpillar; accordingly, a stable driving is possible. The stability of the transmission is confirmed through stress analysis. The method used in our study makes it is possible to manufacture lightweight wheelchairs because a single motor drives both the wheel and caterpillar through the transmission system.

Optimization for speed regulation strategy of compound coupled hydro-mechanical transmission

2020 ◽  
pp. 095440702098056
Author(s):  
Jin Yu ◽  
Pengfei Shen ◽  
Zhao Wang ◽  
Yurun Song ◽  
Xiaohan Dong
Keyword(s):  
Fuel Consumption ◽  
Dynamic Programming Algorithm ◽  
Operating Conditions ◽  
Programming Algorithm ◽  
Speed Ratio ◽  
Mechanical Transmission ◽  
Speed Regulation ◽  
Ratio Change ◽  
Low Efficiency ◽  
Wheel Loaders

Heavy duty vehicles, especially special vehicles, including wheel loaders and sprinklers, generally work with drastic changes in load. With the usage of a conventional hydraulic mechanical transmission, they face with these problems such as low efficiency, high fuel consumption and so forth. Some scholars focus on the research to solve these issues. However, few of them take into optimal strategies the fluctuation of speed ratio change, which can also cause a lot of problems. In this study, a novel speed regulation is proposed which cannot only solve problems above but also overcome impact caused by speed ratio change. Initially, based on the former research of the Compound Coupled Hydro-mechanical Transmission (CCHMT), the basic characteristics of CCHMT are analyzed. Besides, to solve these problems, dynamic programming algorithm is utilized to formulate basic speed regulation strategy under specific operating condition. In order to reduce the problem caused by speed ratio change, a new optimization is applied. The results indicate that the proposed DP optimal speed regulation strategy has better performance on reducing fuel consumption by up to 1.16% and 6.66% in driving cycle JN1015 and in ECE R15 working condition individually, as well as smoothing the fluctuation of speed ratio by up to 12.65% and 19.01% in those two driving cycles respectively. The processes determining the speed regulation strategy can provide a new method to formulate the control strategies of CCHMT under different operating conditions particularlly under real-world conditions.

Research on Power Diffluence and Conflux Mechanism of Hydro-Mechanical Transmission

2012 ◽  
Vol 479-481 ◽  
pp. 921-924
Author(s):  
Zhao Lin Han ◽  
Feng Liu
Keyword(s):  
Power Flow ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Gear Pair ◽  
Pump Speed ◽  
Characteristics Analysis ◽  
Dual Power

Abstract. Hydro-Mechanical Transmission (HMT) is a dual-power flow transmission system in which power is transferred parallel by mechanical transmission and hydraulic transmission. There are four types of HMT: torque-diffluence and torque-conflux, torque-diffluence and speed-conflux, speed-diffluence and speed-conflux, speed-diffluence and torque-conflux, when gear pair and planetary train are used as power diffluence or conflux mechanism respectively. And the result of kinematics characteristics analysis indicates that only torque-diffluence and speed-conflux type of HMT can be used as the vehicle transmission system because its output speed characteristics and pump speed characteristics can meet the requirements of the vehicle drive.

Real-Time Hydro-Mechanical Transmission System Simulations for Model-Guided Assessment of Complex Shift Sequence

2021 ◽  
Author(s):  
Yifeng Tang ◽  
Jason Rodgers ◽  
James McCallum ◽  
Yijing Zhang ◽  
Yuji Fujii
Keyword(s):  
Real Time ◽  
Transmission System ◽  
Mechanical Transmission ◽  
Shift Sequence
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