机械类毕业设计-130马力橡胶履带拖拉机机械液压转向装置的液压系统及其转向操纵系统设计、液压机械变速箱闭式试验台设计.docx

《机械类毕业设计-130马力橡胶履带拖拉机机械液压转向装置的液压系统及其转向操纵系统设计、液压机械变速箱闭式试验台设计.docx》由会员分享，可在线阅读，更多相关《机械类毕业设计-130马力橡胶履带拖拉机机械液压转向装置的液压系统及其转向操纵系统设计、液压机械变速箱闭式试验台设计.docx（91页珍藏版）》请在第一文库网上搜索。

1、摘要本次主要设计130马力橡胶履带拖拉机机械液压转向装置的液压系统及其转向操纵系统，是机械液压双功率流转向装置的液压部分。为了满足设计要求，即：方向盘操纵，能实现原地转向即倒车操作；转向半径可平滑过度；实现最小转向半径；满足转向力矩要求，本次设计的液压系统是一个采用液压先导排量控制的典型容积调速闭式回路。系统采用排量大，转速高，压力大的轴向柱塞泵和轴向柱塞马达，能够较好的满足液压泵变量机构和液压马达的双向运转特性。系统两侧的管道容积相等，安全阀的调定压力相等，保证了车辆转向时液压马达速度变化的动态特性一致，为了保证系统正常稳定的工作，还加入了溢流阀，单向阀和补油泵。在定量液压马达中集中了溢流阀

2、和换向阀，换向阀把马达输出的热油通过溢流阀流回油箱，再通过补油泵和滤清器补进冷油，进入下一个工作循环，从而保证系统的正常油温和油液的清洁。为使驾驶员操作简便，系统通过方向盘来控制整个转向过程，方向盘的转角决定转向半径的大小，方向盘的左右转向决定车辆的转向方向。由方向盘操作的液压先导阀，通过变量液压泵内的伺服阀,实现对液压泵排量的控制，进而控制定量马达的转向和转速。关键词：轴向柱塞变量泵，轴向柱塞定量马达，压力，阀ABSTRACTThis mainly designs the hydraulic system and it s control systemof 130 horsepower ru

3、bbers caterpillar tractor mechanical hydraulicpressure diverting device, it is part of the mechanical hydraulicpressure double power installment hydraulic pressure.In order to satisfy the design request, namely: The steering wheeloperation, can satisfy in-situ changes and the back-draft operation;Th

4、e radial turning may be smooth excessively; satisfy the smallestradial turning; satisfy rotating torque request, the hydraulicsystem uses the hydraulic pressure forerunner displacement tocontrol the typical volume velocity modulation close route. The systemuses axial ram pump and the axial plunger m

5、otor of large displacement,high rotational speed, high pressure, can satisfy hydraulic pumpvariable organization and the oil motor bidirectional revolutioncharacteristic. System, s two sides pipeline volumes is equal, thesafety valve accent decides the pressure equally, and guaranteed thevehicles ch

6、ange when the oil motor speed change dynamic characteristicconsistently, in order to guarantee the system normal stability work,it also has joined the overflow valve, the cone-way valve and makesup the oil pump. Has concentrated the overflow valve and the cross valvein the quota oil motor, the cross

7、 valve the hot oil which outputs themotor flows through the overflow valve and return to the fuel tank,makes up the oil pump and the filter makes up the cold oil, enters thenext operating cycle, thus guarantee system normal oil temperature andfat liquor is clean. In order to cause the pilot to opera

8、te easily,the system controls entire process by the steering wheel s change,the size of radial turning depend on the steering wheel s, steeringwheel s changes decide the vehicle to change the direction. Hydraulicpressure first pilot valve is operated by the steering wheel, throughthe servo valve whi

9、ch is in variable hydraulic pump, to satisfy thehydraulic pump displacement control, then control quota motor changewith rotational speed.KEY WORDS: axial plunger variable pump, axial plunger quota motor ,pressure, valve2. 1、2.2、2.2. 12.2.22.2.3总结致谢参考目录刖百第一章、转向技术的发展及趋势 1.1 向技术的发展过程及优缺点 1.2 双功率流转向机构

10、1.3 K双功率流技术的发展 1.2.2,双功率流履带车辆转向控制研究的意义第二章液压系统工作原理及参数选择液压系统工作原理转向液压系统参数的确定、转向液压马达参数的确定、变量液压泵参数的确定其它元件的选择摘要本次主要设计130马力橡胶履带拖拉机机械液压转向装置的液压系统及其转向操纵系统，是机械液压双功率流转向装置的液压部分。为了满足设计要求，即：方向盘操纵，能实现原地转向即倒车操作；转向半径可平滑过度；实现最小转向半径；满足转向力矩要求，本次设计的液压系统是一个采用液压先导排量控制的典型容积调速闭式回路。系统采用排量大，转速高，压力大的轴向柱塞泵和轴向柱塞马达，能够较好的满足液压泵变量机构和

11、液压马达的双向运转特性。系统两侧的管道容积相等，安全阀的调定压力相等，保证了车辆转向时液压马达速度变化的动态特性一致，为了保证系统正常稳定的工作，还加入了溢流阀，单向阀和补油泵。在定量液压马达中集中了溢流阀和换向阀，换向阀把马达输出的热油通过溢流阀流回油箱，再通过补油泵和滤清器补进冷油，进入下一个工作循环，从而保证系统的正常油温和油液的清洁。为使驾驶员操作简便，系统通过方向盘来控制整个转向过程，方向盘的转角决定转向半径的大小，方向盘的左右转向决定车辆的转向方向。由方向盘操作的液压先导阀，通过变量液压泵内的伺服阀,实现对液压泵排量的控制，进而控制定量马达的转向和转速。关键词：轴向柱塞变量泵，轴向

12、柱塞定量马达，压力，阀ABSTRACTThis mainly designs the hydraulic system and it s control systemof 130 horsepower rubbers caterpillar tractor mechanical hydraulicpressure diverting device, it is part of the mechanical hydraulicpressure double power installment hydraulic pressure.In order to satisfy the design re

13、quest, namely: The steering wheeloperation, can satisfy in-situ changes and the back-draft operation;The radial turning may be smooth excessively; satisfy the smallestradial turning; satisfy rotating torque request, the hydraulicsystem uses the hydraulic pressure forerunner displacement tocontrol th

14、e typical volume velocity modulation close route. The systemuses axial ram pump and the axial plunger motor of large displacement,high rotational speed, high pressure, can satisfy hydraulic pumpvariable organization and the oil motor bidirectional revolutioncharacteristic. System, s two sides pipeli

15、ne volumes is equal, thesafety valve accent decides the pressure equally, and guaranteed thevehicles change when the oil motor speed change dynamic characteristicconsistently, in order to guarantee the system normal stability work,it also has joined the overflow valve, the cone-way valve and makesup the oil pump. Has concentrated the overflow valve and the cross valvein the quota oil motor, the cross valve the hot oil which outputs themotor flows through the overflow valve and return to the fuel tank,makes up the oil pump and the filter