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330730-080-00-00本特利Bently Nevada★ 热线：0592-6808394/18050035902（微信同号）★ 业务QQ：1982497648
摘要:在分析现有基本回路的基础上,文中提出了一种两调速阀串联二工进速度换接的新回路,并对其来源、组成、原理、特点及其在动力滑台双泵供油二工进液压系统新回路中的应用进行了阐述。新回路具有各调速阀可独自调节与能量消耗较低等新特点。
1 现有二调速阀串联的两工进速度换接回路
图1所示为当今教材中普遍介绍的、现有二调速阀串联的两工进速度换接回路。当阀1左位工作且阀3断开时,控制阀2的通或断,使油液经调速阀a、或既经调速阀a后又经调速阀b才能进入液压缸左腔,从而实现第一次工作进给或第二次工作进给。这里要求调速阀b的开口需调节得比调速阀a的开口小,即第二次工进的速度必须比第一次工进的速度低;此外,第二次工作进给时,油液流经调速阀a后又流过调速阀b,须经过两个调速阀,故液压能量损失较大。
2 二调速阀串联的两工进速度换接新回路
2.1 新回路的组成与原理
将图1所示的现有回路中、阀3接在e点油路略加改动移接至d处,即阀3的进、出油口分别接到c、d处,改为只与调速阀a并联;另外,阀2的规格适量加大。新回路不但完全实现已有回路的所有动作循环,而且还具有一些现有回路不具备的新优点,现分析如下(参见图2)。
(1)快进
按下启动按钮,电磁铁iya通电,三位换向阀左位接入系统工作;电磁铁2ya、3ya、4ya均不带电,阀2和阀3的右位(参见图2)接入系统工作;从油泵来的压力油经阀1左位、阀3和阀2的右位进入液压缸左腔;液压缸右腔的油经阀1回油箱,推动活塞与工作台快速右移,实现快进。
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IC200CHS022
IC200CPUE05
IC200MDL640
IC200MDL740
IC200PWR002
IC698CHS009
IC698CRE030
IC698ETM001
IC698PSA100
L3MF-032/64GFOKS-G 序列号S/N：118516-002
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140CPS11420
140CRP81100
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1756-IB32 B
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2711-M3A18L1
SC200S
3704E
4119A
IC693ALG221J
1785-BCM/C
1785-L80E/E
140CPS11420
3HAB5956-1
3HAB8101-8
3HAB9669-1
3HAC3462-1
S42024-A1744-A2 G01
140ACI04000
1747-L553
NE122-205
4211
6FX1138-6BL01
6FX1144-2BA00
FX84A-5
1747-L543
THROTTLE ConTROL VALVE 253B-2-50-2
1336-BDB-SP76D
1783-MS10T
1783-MX08T
1783-SFP100FX
1756-A17
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发布时间:2022-04-17 11:40 点击:153