| 摘要: |
| 针对牵引式和液压步进式猪舍传统机械清粪系统存在的稳定性低、耐久性差等问题，基于猪舍步进式机械清粪工艺，设计一种曲柄连杆传动机构，确定其主要参数取值，并采用ADAMS进行运动学仿真测试；对比传动杆在5种材料选型(1#U型槽钢、2#U型槽钢、5#槽钢、6.3#槽钢和8#槽钢)和2种连接方式(销接和焊接)下的形变量，对传动杆的型材和连接方式进行选择；对清粪系统进行现场性能测试，对比3种电机转速(4.84、2.96和1.40 r/min)的曲柄连杆传动与固定速度液压传动的清粪系统的运行阻力、能耗和清粪效率。结果表明:1)曲柄连杆传动机构主要参数取值为滑块行程S=600 mm、行程速比系数K=1.25、极位夹角θ=20°、曲柄长度L1=272 mm、连杆长度L2=778 mm、偏心距e=303 mm，运动学仿真模拟验证了曲柄连杆机构设计的合理性；2)选用6.3#槽钢以焊接方式连接的传动杆形变量较小；3)曲柄连杆传动的清粪系统在电机转速为1.40 r/min时，运行阻力最小、能耗最低、清粪时长适中，可满足清粪系统功能需求，整体性能优于液压传动和电机转速4.84、2.96 r/min曲柄传动的清粪系统。 |
| 关键词: 猪舍 清粪系统 传动机构 曲柄连杆 |
| DOI：10.11841/j.issn.1007-4333.2022.10.15 |
| 分类号: |
| 基金项目:国家现代农业产业技术体系(CARS-35) |
|
| Design and experiment of crank connecting rod transmission mechanism for pig house stepping manure scraping system |
|
ZENG Yaqiong1,YANG Jiale1,2,CHEN Gang2,WANG Hao1*,LIU Zuohua1,LONG Dingbiao1
|
|
1.Chongqing Academy of Animal Sciences, Chongqing 402460, China;2.College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China
|
| Abstract: |
| Traditional mechanical manure removal systems such as traction type and hydraulic stepping type in pig houses often have problems of low stability and poor durability. Therefore, this study designed a crank connecting rod transmission based on the step-by-step mechanical manure removal system in pig houses. The main parameters of the crank mechanism were determined and verified by kinematics simulation using ADAMS. For the connecting rod of the transmission mechanism, the deformation amount of 5 materials(1# U-shaped channel steel, 2# U-shaped channel steel, 5# channel steel, 6. 3# channel steel, 8# channel steel)under 2 connection methods(pinning and welding)was tested. In the performance test of the manure removal system, the operating resistance, energy consumption, and manure removal efficiency of system using crank connecting rod at 3 types of motor speeds(4. 84 r/min, 2. 96 r/min and 1. 40 r/min, respectively)or fixed-speed hydraulic transmission were tested and compared. The results showed that: 1)The main parameters of the crank connecting rod transmission mechanism were slider stroke S 600 mm, stroke speed ratio coefficient K 1. 25, pole angle θ 20°, crank length L1 272 mm, connecting rod length L2 778 mm, and eccentricity e 303 mm. The kinematics simulation verified the rationality of the crank-link mechanism design. 2)When 6. 3# channel steel was selected and welded connection was adopted, the deformation of the transmission rod was smaller. 3)When the motor speed of the crank connecting rod transmission mechanism was 1. 40 r/min, the operation resistance of the manure removal system was the smallest, the energy consumption was the lowest, and the manure removal time was moderate. Under this condition, the functional requirements of the system can be satisfied, and the overall performance of the system is better than that of hydraulic transmission and crank transmission with motor speeds of 4. 84 and 2. 96 r/min. |
| Key words: pig house manure removal system transmission mechanism crank connecting rod |
