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四川省《DB51/T 2567-201936.8 kW以下丘陵山地拖拉机技术条件》解读

2022-09-16 11:07:57 来源:农机网整理发布 阅读量:27124 评论

导读:当前,四川农业发展还存在一些短板,如:土地资源结构先天不足,山地丘陵居多;机械现代化不高。

  【农机网 政策与标准】当前,四川农业发展还存在一些短板,如:土地资源结构先天不足,山地丘陵居多;机械现代化不高,全省装备有效供给不充分,适宜丘陵山地作业的农机装备不多。近两年国家大力号召发展适合丘陵山地的农机化,相关地方技术标准也陆续出台。

  2019年4月16日,四川省市场监督管理局批准发布了《DB51/T 2567-201936.8 kW以下丘陵山地拖拉机技术条件》,该标准自2019年5月1日起实施。本标准由四川省经济和信息化厅提出并归口,由四川川龙拖拉机制造有限公司、西华大学、四川省农业机械鉴定站起草。
 
  本标准规定了36.8 kW以下丘陵山地拖拉机的术语、定义、技术要求、试验规程、检验规则、交货、标志、运输和贮存。适用于36.8 kW以下丘陵山地拖拉机(以下简称拖拉机)。
 
  技术要求——
 
  一般要求:
 
  拖拉机应按照经规定程序批准的产品图样和技术文件制造。
 
  拖拉机的外协、外购件应符合相关标准或图样要求,经检验合格方可进行装配。
 
  拖拉机装配的零部件应进行清洁处理,不得有污渍现象。
 
  拖拉机上的零部件用紧固件连接的,应按要求连接牢靠,不应有松动现象。
 
  拖拉机正常工作时各系统不应有异常响声,不应有漏油、漏水、漏气、漏电现象,发动机不允许窜机油。
 
  防泥水试验后的拖拉机不允许有泥水渗入机体。
 
  拖拉机外观质量应符合JB/T 6712的规定,涂漆应符合JB/T 5673的规定,漆膜附着性能应不低于JB/T 9832.2-1999中II级的规定。
 
  发动机在全程调速范围内应能稳定运转,并能通过起动开关使发动机停止运转;手油门手柄应能可靠停在任何位置,不受脚油门操纵的影响。
 
  拖拉机各操纵机构的运转应轻便灵活、松紧适度,各机构行程调整应符合使用说明书规定。所有能自动回位的操纵件,在操纵力去除后应能自动回位,非自动回位的操纵件应能可靠地停在选定位置。各操纵机构的最大操纵力应符合GB/T 19407的规定。
 
  离合器应结合平稳、分离彻底,结合时应能传递发动机全部转矩。
 
  变速箱在换挡时,操作应灵活,定位应可靠;在各档位工作时,变速箱不允许有乱挡、脱挡等换挡失效现象;装备有静液压无级变速器(HST)的拖拉机,HST应符合JB/T 10831的相关规定。
 
  后置动力输出轴应符合GB/T 1592的规定,前置动力输出轴和前悬挂装置应符合GB/T 10916的规定;
 
  配置有中置动力输出轴的拖拉机,中置动力输出轴应在拖拉机的中部位置,其尺寸、型式、转速和旋转方向应符合GB/T 1592的规定。
 
  丘陵山地拖拉机的前驱动桥应符合GB/T 21958的规定。
 
  有自动调平机构的拖拉机,应有悬挂装置坡地自适应调整装置,自动调平机构和悬挂装置坡地自适应调整装置应工作平稳、可靠。
 
  拖拉机应能全程平稳转向,不允许出现不连续运转和冲击现象,转向性能应符合GB/T 19040的规定;转向盘最大自由转动量不大于30°,行驶过程中拖拉机熄火时应能实现人力转向;四轮转向的拖拉机向两轮转向切换时,应准确可靠、后轮回正。
 
  后置式液压悬挂装置应符合GB/T 1593的规定,拖拉机牵引装置应符合GB/T 2780的规定,拖挂装置应符合GB/T 2779的规定,液压快换接头应符合GB/T 5862的规定。
 
  后轮可选装三角橡胶履带行走机构的拖拉机,三角橡胶履带行走机构能与轮胎进行互换。3
 
  拖拉机上的仪表应符合JB/T 6697的规定,参数、状态显示应清晰准确,信号报警系统和电气照明及其开关的工作应可靠。
 
  拖拉机上的电子控制系统应工作可靠,线束布置整齐、固定牢固、各连接处连接牢固可靠。
 
  在磨合运行和性能试验期间,各密封面、管接头处应在调整、紧固三次后无渗漏。
 
  拖拉机产品使用说明书应符合GB/T 9480的规定。
 
  安全要求及环保要求——
 
  拖拉机安全的一般要求应符合GB 18447.1-2008中4.1的规定。
 
  拖拉机的安全防护应符合GB 18447.1-2008中4.2的规定。
 
  拖拉机制动性能应符合GB 18447.1-2008中4.3的规定。
 
  a)拖拉机在20%的干硬坡道上,使用驻车制动装置,应能沿上下坡方向可靠停住。b)拖拉机冷态试验的制动平均减速度应不小于2.5 m/s2。
 
  拖拉机照明、信号装置应符合GB 18447.1-2008中4.4的规定。
 
  拖拉机安全操作标识应符合GB 18447.1-2008中4.5的规定。
 
  拖拉机安全使用信息应符合GB 18447.1-2008中第5章的规定。
 
  拖拉机排气污染物排放限值应符合GB 20891-2014中5.2.3中第三阶段的要求。
 
  拖拉机噪声应符合GB 6376的要求。
 
  拖拉机配套发动机应具有质量安全标志及符合GB 20891规定的标签。
 
  可靠性要求:平均故障间隔时间MTBF应不小于210小时,无故障综合评分值(Q)应不小于70分。
 
  主要性能要求——
 
  在发动机标定转速下,动力输出轴的最大功率应不低于发动机标定功率(12 h)的81%,且不超过发动机标定功率(12h)。
 
  动力输出轴变负荷燃油消耗率应不大于350 g/(kW²h)。
 
  动力输出轴最大转矩点转速与动力输出轴最大功率点(在发动机标定转速下)转速之比应不大于75%。
 
  动力输出轴转矩储备率应不小于18%。
 
  拖拉机最大牵引力应符合企业规定值的要求,额定牵引力不小于5 kN;拖拉机最大牵引功率应
 
  不小于发动机标定功率(12 h)的0.75倍;拖拉机最大牵引工况下的牵引比油耗应不大于340 g(/kW²h)。
 
  拖拉机在-5℃的环境温度下应能顺利起动。
 
  在环境温度40℃的条件下,做拖拉机高温性能试验,发动机冷却液的温度应低于100℃,发动机润滑油温度及排气温度、拖拉机传动与液压系统油温应不高于企业规定的最高限值。
 
  拖拉机最小转向圆半径应不大于4 m。
 
  拖拉机在10°~15°之间的坡地上应能在悬挂标准机具的状态下灵活转向。
 
  拖拉机的最大提升力(加载上在悬挂轴后610 mm处)应不小于企业规定值,丘陵山地拖拉机提升器的提升力应符合GB/T 15370.1-2012中3.3.6.1之规定且不小于4 kN,在最大提升力时,提升时间应不大于3 s,提升过程中不允许出现抖动、爬行、异常响声、漏油和安全阀开启现象;30 min静沉降值应不大于加载点行程的4%。
 
  具有液压输出功能的拖拉机,其最大液压输出功率与发动机标定功率(12 h)之比应不小于12%。
 
  拖拉机爬坡度应不小于20°。
 
  具有调平功能的拖拉机,拖拉机经调平机构调平后的整机倾角应不大于5°。
 
  具有自动调平功能的拖拉机,从0°调整到10°的自动调平时间不大于18 s,从0°调整到15°自动调平时间不大于25 s。
 
  具有悬挂装置坡地调整功能的拖拉机,调节后,机具与地面的夹角应不大于5°。
 
  具有悬挂装置坡地自适应调整功能的拖拉机,从0°调整到10°的悬挂装置坡地自适应调整时间应不大于7 s,从0°调整到15°的悬挂装置坡地自适应调整时间应不大于10 s。
 
 
  可点击下方下载完整标准文件。
 
  注:本文由农机网(www.nongjx.com)整理发布,资料来源:地方标准信息公共服务平台。
相关资料下载:

DB51T2567-2019FDIS.pdf

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