一方面可使流闭型节流后的突然扩大延后,起转移破坏位置,使之远离密封面的作用;另一方面,又增加了节流阻力,减小了压力的恢复程度,使汽蚀减弱。有的把阀座孔内设计成台阶式、波浪式,就是为了增加阻力,削弱汽蚀。这种方法在引进装置中的高压阀上和将老的阀加以改进时经常使用,也十分有效。改变流向提高寿命法流开型向着开方向流,汽蚀、冲蚀主要作用在密封面上,使阀芯根部和阀芯阀座密封面很快遭受破坏;流闭型向着闭方向流,汽蚀、冲蚀作用在节流之后,阀座密封面以下,保护了密封面和阀芯根部,延长了寿命。
一看液压泵是否能输出液压油。若无液压油输出,则可能是:泵的转向不对:零件磨损严重或破坏:吸油管阻力过大(滤油器堵塞、油液黏度过大等)或漏气。如果是新泵,则可能是泵体有铸造缺陷(如沙眼等),使吸油腔与压油腔相通,失去压油能力;泵的输入功率不足或泵轴扭断,使泵的输出油压达不到工作压力或输不出油。若液压泵油油液输出,则应检查各回油管,观察是哪一个元件溢油。如溢流回油管溢油,则可能是阀的调定压力低造成的。此时,可拧紧溢流阀调压弹簧,若压力无变化,则可能是溢流阀主阀芯或先导部分的锥阀上有脏物或因锈蚀而卡死在开口位置;或因弹簧折断而失去作用;或因阻尼孔被脏物阻塞,使泵输出的油液直接经溢流阀流会油箱,造成压力不足或无压力。
Pb-感温包压力Pe-蒸发压力Ps-弹簧压力Pb=Ps+Pe,膜片不移动。当感温包压力上升,导致PbPs+Pe时,膜片向下移动,阀门打开,更多制冷剂流入蒸发器。当感温包压力下降,导致PbPs+Pe时,膜片向上移动,阀门关闭,流入蒸发器的制冷剂减少。冷系统储液器在高压条件下,压缩后的制冷剂蒸气在冷凝器中凝结为液体制冷剂。离开冷凝器后,液体流经储液器。储液器主要有两个功能。储液器对负荷变化造成的冷凝器液位变化进行补偿。
EPFN型与EPF型一样采用低耗的九翼型叶片风轮设计,但不同的是,EPFN型采用的传动布置方式是以进口无阻碍的Arr.1或Arr.4为主。十二叶片型叶轮E系列无涡壳十二叶片型叶轮主要有EPQ和EPQN两种型号。EPQ型的十二翼型叶片双城风轮设计产生的噪声频谱平整,减少了尖纯音质的激励,使整个风机的噪声特性更加优良化。其传动布置方式则以Arr.3为主。EPQN型因也是十二翼型叶片,所以噪声特性优良。
25V21A-1C22R 25V17A-11C22R 25V14A-86D22R 25V21A-1C22R
25V17A-11C22R 25V14A-86D22R 25V-10A-86A-22R 25V-21A-11A-22R
25V-17A-86B-22R 25V-10A-86C-22R 25V-21A-11C-22R 25V-17A-86D-22R
25V10A-86A22R 25V21A-11A22R 25V17A-86B22R 25V10A-86C22R
25V21A-11C22R 25V17A-86D22R 25V-12A-86A-22R 25V-10A-1B-22R
25V-21A-86B-22R 25V-10A-1A-22R 25V-21A-86A-22R 25V-17A-1B-22R
25V-10A-1C-22R 25V-21A-86C-22R 25V-17A-1D-22R 25V10A-1A22R
25V21A-86A22R 25V17A-1B22R 25V10A-1C22R 25V21A-86C22R
25V17A-1D22R 25V-12A-1A-22R 25V-10A-11A-22R 25V-21A-1B-22R
25V-12A-1C-22R 25V-10A-11C-22R 25V-21A-1D-22R 25V12A-1A22R
25V10A-11A22R 25V21A-1B22R 25V12A-1C22R 25V10A-11C22R
25V21A-1D22R 25V-14A-1A-22R 25V-12A-11A-22R 25V-10A-86B-22R
25V-14A-1C-22R 25V-12A-11C-22R 25V-10A-86D-22R 25V14A-1A22R
25V12A-11A22R 25V10A-86B22R 25V14A-1C22R 25V12A-11C22R
25V10A-86D22R 25V-17A-1A-22R 25V-14A-11A-22R 25V-12A-86B-22R
25V-17A-1C-22R 25V-14A-11C-22R 25V-12A-86D-22R25V17A-1A22R
25V14A-11A22R 25V12A-86B22R
VICKERS (威格士) 2520V系列双联泵
VICKERS (威格士) 2520V 10A 5 1C22R VICKERS (威格士) 2520V 12A 5 1C22R
VICKERS (威格士) 2520V 14A 5 1C22R VICKERS (威格士) 2520V 17A 5 1C22R
VICKERS (威格士) 2520V 21A 5 1C22R
VICKERS (威格士) 2520V 12A8 1C22R VICKERS (威格士) 2520V 14A 8 1C22R
VICKERS (威格士) 2520V 17A 8 1C22R VICKERS (威格士) 2520V 21A 8 1C22R
VICKERS (威格士) 2520V 12A10 1C22R VICKERS (威格士) 2520V 14A 10 1C22R
VICKERS (威格士) 2520V 17A 10 1C22R VICKERS (威格士) 2520V 21A 10 1C22R
VICKERS (威格士) 2520V 12A12 1C22R VICKERS (威格士) 2520V 14A 12 1C22R
VICKERS (威格士) 2520V 17A 121C22R VICKERS (威格士) 2520V 21A 12 1C22R
VICKERS (威格士) 2520V 12A14 1C22R VICKERS (威格士) 2520V 14A 14 1C22R
VICKERS (威格士) 2520V 17A 14 1C22R VICKERS (威格士) 2520V 21A 14 1C22R
VICKERS (威格士) 2525V系列双联泵
VICKERS (威格士) 2525V 10A 10 1C22R VICKERS (威格士) 2525V 12A 10 1C22R
VICKERS (威格士) 2525V 14A 10 1C22R VICKERS (威格士) 2525V 17A 10 1C22R
VICKERS (威格士) 2525V 21A 10 1C22R
VICKERS (威格士) 2525V 10A 12 1C22R VICKERS (威格士) 2525V 12A 12 1C22R
VICKERS (威格士) 2525V 14A 12 1C22R VICKERS (威格士) 2525V 17A 12 1C22R
VICKERS (威格士) 2525V 21A 12 1C22R
VICKERS (威格士) 2525V 10A 14 1C22R VICKERS (威格士) 2525V 12A 14 1C22R
VICKERS (威格士) 2525V 14A 14 1C22R VICKERS (威格士) 2525V 17A 14 1C22R
VICKERS (威格士) 2525V 21A 14 1C22R
VICKERS (威格士) 2525V 10A 17 1C22R VICKERS (威格士) 2525V 12A 17 1C22R
VICKERS (威格士) 2525V 14A 17 1C22R VICKERS (威格士) 2525V 17A 17 1C22R
VICKERS (威格士) 2525V 21A 17 1C22R
VICKERS (威格士) 2525V 10A 21 1C22R VICKERS (威格士) 2525V 12A 21 1C22R
VICKERS (威格士) 2525V 14A 21 1C22R VICKERS (威格士) 2525V 17A 21 1C22R
VICKERS (威格士) 2525V 21A 21 1C22R
VICKERS (威格士) 3520V系列双联泵
VICKERS (威格士) 3520V 25A 5 1C22R VICKERS (威格士) 3520V 30A 5 1C22R
VICKERS (威格士) 3520V 35A 5 1C22R VICKERS (威格士) 3520V 38A 5 1C22R
VICKERS (威格士) 3520V 25A 8 1C22R VICKERS (威格士) 3520V 30A 8 1C22R
VICKERS (威格士) 3520V 35A 8 1C22R VICKERS (威格士) 3520V 38A 8 1C22R
VICKERS (威格士) 3520V 25A 10 1C22R VICKERS (威格士) 3520V 30A 10 1C22R
VICKERS (威格士) 3520V 35A 10 1C22R VICKERS (威格士) 3520V 38A 10 1C22R
VICKERS (威格士) 3520V 25A 11 1C22R VICKERS (威格士) 3520V 30A 11 1C22R
VICKERS (威格士) 3520V 35A 11 1C22R VICKERS (威格士) 3520V 38A 11 1C22R
VICKERS (威格士) 3520V 25A 12 1C22R VICKERS (威格士) 3520V 30A 12 1C22R
VICKERS (威格士) 3520V 35A 12 1C22R VICKERS (威格士) 3520V 38A 12 1C22R
VICKERS (威格士) 3520V 25A 14 1C22R VICKERS (威格士) 3520V 30A 14 1C22R
VICKERS (威格士) 3520V 35A 14 1C22R VICKERS (威格士) 3520V 38A 14 1C22R
VICKERS (威格士) 3525V系列双联泵
VICKERS (威格士) 3525V 25A 10 1C22R VICKERS (威格士) 3525V 30A 10 1C22R
VICKERS (威格士) 3525V 35A 10 1C22R VICKERS (威格士) 3525V 38A 10 1C22R
VICKERS (威格士) 3525V 25A 12 1C22R VICKERS (威格士) 3525V 30A 12 1C22R
VICKERS (威格士) 3525V 35A 12 1C22R VICKERS (威格士) 3525V 38A 12 1C22R
VICKERS (威格士) 3525V 25A 14 1C22R VICKERS (威格士) 3525V 30A 14 1C22R
VICKERS (威格士) 3525V 35A 14 1C22R VICKERS (威格士) 3525V 38A 14 1C22R
VICKERS (威格士) 3525V 25A 17 1C22R VICKERS (威格士) 3525V 30A 17 1C22R
VICKERS (威格士) 3525V 35A 17 1C22R VICKERS (威格士) 3525V 38A 17 1C22R
VICKERS (威格士) 3525V 25A 21 1C22R VICKERS (威格士) 3525V 30A 21 1C22R
VICKERS (威格士) 3525V 35A 21 1C22R VICKERS (威格士) 3525V 38A 21 1C22R
VICKERS (威格士) 4520V系列双联泵
VICKERS (威格士) 4520V 42 A 5 1C22R VICKERS (威格士) 4520V 45A 5 1C22R
VICKERS (威格士) 4520V 50 A 5 1C22R VICKERS (威格士) 4520V 60 A 5 1C22R
VICKERS (威格士) 4520V 42 A 8 1C22R VICKERS (威格士) 4520V 45A 8 1C22R
VICKERS (威格士) 4520V 50 A 8 1C22R VICKERS (威格士) 4520V 60 A 8 1C22R
VICKERS (威格士) 4520V 42 A 9 1C22R VICKERS (威格士) 4520V 45A 9 1C22R
VICKERS (威格士) 4520V 50 A 9 1C22R VICKERS (威格士) 4520V 60 A 9 1C22R
VICKERS (威格士) 4520V 42 A 11 1C22R VICKERS (威格士) 4520V 45A 11 1C22R
VICKERS (威格士) 4520V 50 A 11 1C22R VICKERS (威格士) 4520V 60 A 11 1C22R
VICKERS (威格士) 4520V 42 A 12 1C22R VICKERS (威格士) 4520V 45A 12 1C22R
VICKERS (威格士) 4520V 50 A 12 1C22R VICKERS (威格士) 4520V 60 A 12 1C22R
VICKERS (威格士) 4520V 42 A 14 1C22R VICKERS (威格士) 4520V 45A 14 1C22R
VICKERS (威格士) 4520V 50 A 14 1C22R VICKERS (威格士) 4520V 60 A 14 1C22R
VICKERS (威格士) 4525V系列双联泵
VICKERS (威格士) 4525V42A 10 1C22R VICKERS (威格士) 4525V 45A 10 1C22R
VICKERS (威格士) 4525V50A 10 1C22R VICKERS (威格士) 4525V 60A 10 1C22R
VICKERS (威格士) 4525V42A 12 1C22R VICKERS (威格士) 4525V 45A 12 1C22R
VICKERS (威格士) 4525V50A 12 1C22R VICKERS (威格士) 4525V 60A 12 1C22R
VICKERS (威格士) 4525V42A 14 1C22R VICKERS (威格士) 4525V 45A 14 1C22R
VICKERS (威格士) 4525V50A 14 1C22R VICKERS (威格士) 4525V 60A 14 1C22R
VICKERS (威格士) 4525V42A 17 1C22R VICKERS (威格士) 4525V 45A 17 1C22R
VICKERS (威格士) 4525V50A 17 1C22R VICKERS (威格士) 4525V 60A 17 1C22R
VICKERS (威格士) 4525V42A 21 1C22R VICKERS (威格士) 4525V 45A 21 1C22R
VICKERS (威格士) 4525V50A 21 1C22R VICKERS (威格士) 4525V 60A 21 1C22R
VICKERS (威格士) 4535V系列双联泵
VICKERS (威格士) 4535V42A 25 1C22R VICKERS (威格士) 4535V 45A 25 1C22R
VICKERS (威格士) 4535V50A 25 1C22R VICKERS (威格士) 4535V60A 25 1C22R
VICKERS (威格士) 4535V42A 30 1C22R VICKERS (威格士) 4535V 45A 30 1C22R
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