对于一般使用条件下的白山干式变压器组,其PT泵往往只装有PTG调速器。PTG调速器只控制怠速和******转速,在急速和******转速之间直接由驾驶员通过节流阀控制供油。PTG调速器主要由柱塞、柱塞套、飞锤、压力控制钮、怠速弹簧、弹簧等组成。从齿轮泵经弗列加滤清器来的燃油经供油管路和柱塞套上的油孔进入柱塞中段凹陷部分的环状空间,并由此经怠速油路或正常工作运行油路到喷油器。同时,燃油还由柱塞的轴向孔流到柱塞与压力控制钮之间。机工作运行时(起动时除外),在燃油压力的作用下,柱塞与压力控制钮之间形成一个间隙,部分燃油经此间隙和旁通油路回到齿轮泵的入口处。(1)怠速控制怠速工作运行过程。怠速时,节流阀关闭(由驾驶员操纵),正常工作运行油路被切断,这时机转速很低,飞锤的离心力很小,急速弹簧17稍被压缩,柱塞处于接近最左端的位置。怠速油路5(它的断面较小)与从齿轮泵来的供油进油道4接通,燃油从怠速油路不经节流阀直接经过切断阀送往喷油器,维持机急速所需的油量。此时若机的转速升高,毛锤的离心力增大,超过此时怠速弹簧的作用力,推动柱塞略向右移,柱塞上的台阶将怠速油路的流通面积遮住一部分,对燃油产生较大的节流作用,使经怠速油路到喷油器的油压下降,因而怠速油量减少,限制了怠速转速的升高、机转速降低时,在怠速弹簧17的作用下压力控制钮左移,消除间隙后推动柱塞左移,使怠速油道的通过断面积增大,喷油量相应增加,使机转速回升。(2)正常工况和控制 机在正常工作运行时(转速在怠速与标定转速之间),驾驶员踩下油门踏板,使节流阀打开,燃油通过正常工作运行油路和节流阀送往喷油器,这时由于转速的升高,飞锤的离心力通过柱塞将怠速弹簧进一步压缩,柱塞处于中间位置,柱塞上的台阶处于怠速油路与正常工作运行油路之间,正常工作运行油路始终处于接通状态送往喷油器的油压(也就是节流阀后的油压)取决于节流阀的开度和机的转速。节流阀开度越大,送往喷油器的油压会越高(因为节流阀的节流作用减小了),喷油器计量孔每循环的进油量就越多,因而提高了机负荷能力。当机转速升高时,飞锤的离心力增大,推动柱塞右移。由于调速器起作用前,在燃油压力的作用下,压力控制钮与柱塞两者的端面保持间隙Δ,部分燃油从此间隙经旁通油道流回。柱塞右移将使间隙减小,使通过旁通油道的同油量减少,柱塞套筒内腔的油压即出油口的燃油压力随之增高,从而使喷油量不会因转速升高喷油器进油时间缩短而减少。反之亦然。由此可见,在PT燃油系统中,喷油器的进油时间和PT泵的出油压力始终处于动态适应过程,从而使喷油器每循环的喷油量满足机的不同工况要求。这就是压力—时间(PT)系统工作运行的基本原理。当机转速超过标定转速并继续升高时,飞锤离心力进一步增大,克服弹簧的弹力,使柱塞继续右移,柱塞上的台阶将正常工作运行油路遮住一部分或全部,由于出油口的节流作用,供油压力急剧下降,喷油量随之迅速减少,从而限制了机超速。这时,较多的燃油经旁通油路回到齿轮泵的吸油端,PTG调速器的作用限制了机的******转速。(3)转矩校正 转矩校正过程,转矩弹簧装在柱塞套筒和柱塞之间,当飞锤因离心力张开而使转矩弹簧压缩时,转矩弹簧将阻止柱塞体右移。机转速较低时,转矩弹簧处于自由状态。当转速升高到最大转矩转速时,转矩弹簧开始与柱塞套筒接触。随着转速继续升高,柱塞右移,转矩弹簧也逐渐被压缩,阻止柱塞的移动和间隙Δ的减小,从而延缓了燃油压力的增高,使喷油量相对减少,最终使机的转矩随转速升高而有较大的下降,以提高机时的适应性。(4)转矩校正 转矩校正过程,在飞锤柱塞的左端装有转矩弹簧(亦称飞锤助推弹簧)。当转速降低时,飞锤柱塞左移,转矩弹簧被压缩,使飞锤柱塞的移动受阻,调速柱塞19左移亦受阻,从而延缓了间隙Δ的增大和燃油压力的下降,使喷油量相对增加、因此,转矩弹簧的作用是当机运转时,使其转矩适当增大,以提高机在时的适应性。转矩机构的结构细节。
动力设备(深圳)有限公司,集团旗下专业运营白山干式变压器的销售业务及其售后服务,是中国区获得授权的白山干式变压器OEM成套厂家,长期与中字央企、大型房地产商、国际连锁酒店、著名建筑企业等单位建立战略合作伙伴关系。动力在中国布局五大白山干式变压器组生产基地,白山干式变压器售后服务点可辐射中国各省会及地级市区域。l白山干式变压器区分:移动式白山干式变压器、固定式白山干式变压器、超静音式白山干式变压器、机组载式白山干式变压器。l常见白山干式变压器功率(千瓦)范围:50KW至1000KW功率段。更多有关白山干式变压器的最新产品和技术内容,请登录白山干式变压器官网:
http://www.11fdj.com白山干式变压器组的技术指标与其稳定性领先全球:高压注入(HPI)PT全权电子燃油系统。HPI G-Drive采用PT燃油系统由控制系统(GCS)控制器,这是提供off-engine安装白山干式变压器组的控制面板。量子控制一个特定的燃料系统板与HPI-PT燃油系统接口,提供了一个引擎保护包给大客户的灵活性和成本有效的替代控制设计和完整的权威electroni的好处。nCTT(涡轮增压技术)HX82 HX83涡轮增压利用排气能量与更高的效率改进的排放和燃料消耗。n低温冷却后,两泵双回线(2 p2l)。n黑色金属铸造球墨铸铁(FCD)活塞-高强度设计提供卓越的耐久性。nG-Drive集成设计,每个组件都有专门为G-Drive产品开发和严格的测试,确保高性能,耐久性和可靠性。n服务和支持——G-Drive以上信息由深圳动力官方发布,未经允许请勿转载!Cummins power equipment (shenzhen) co., LTD., corp., a professional operating cummins diesel generator sales and after-sales service, is China authorized OEM kit manufacturer of diesel generator, and for a long time in the state, large real estate developers, famous international hotel chain, construction enterprises and other units to establish strategic cooperative partnership. Cummins power layout in China five largest production base for diesel generator set, generator after-sales service point radiation China provinces and cities area.lgenerator to distinguish: portable generators, stationary generators, silent type generator, vehicular power generators.lcommon range of generator power (kw) : 50 kw to 1000 kw power.More about the latest products and technology content diesel generators, please log in the generator's official website:
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Cummins High Pressure Injection (HPI) PT full authority electronic fuel system.The HPI PT fuel system is managed by a G-Drive Governor Control System (GCS) controller, which is provided for off-engine mounting in the genset control panel. The Quantum Control has a specific fuel system board to interface with the HPI-PT fuel system and provides an Engine Protection package giving greater customer flexibility and cost effective alternatives in the control design and the benefits of Full Authority electronic control.
nCTT (Cummins Turbo Technologies) HX82/HX83 turbo-chargingutilizes exhaust energy with greater efficiency for improved emissions and fuel consumption. nLow Temperature After-cooling- Two-pump Two-loop (2P2L). nFerrous Cast Ductile Iron (FCD) Pistons- High strength design delivers superior durability. nG-Drive Integrated Design- Each component has been specifically developed and rigorously tested for G-Drive products, ensuring high performance, durability and reliability. nService and Support- G-Drive products are backed by an uncompromising level of technical support and after sales service, delivered through a world class service network. nCoolpac Integrated Design-Products are supplied complete with cooling package and air cleaner kit for a complete power package. Each component has been has been specifically developed and rigorously tested for G-Drive products, ensuring high performance, durability and reliability.
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