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液壓系統(tǒng)先導(dǎo)式溢流閥工作原理與結(jié)構(gòu)特點

先導(dǎo)式溢流閥的工作原理：

當(dāng)壓力油從入口流入時，壓力作用在主閥芯下端平面上。閥體內(nèi)部設(shè)計有阻尼孔，壓力油通過后進(jìn)入先導(dǎo)閥的右腔，并最終作用于先導(dǎo)溢流閥的閥芯上。先導(dǎo)溢流閥的閥芯受彈簧推力而處于常閉狀態(tài)，通過外部的調(diào)節(jié)手柄，可對彈簧的預(yù)調(diào)壓力做出調(diào)整。當(dāng)液壓壓力小于彈簧預(yù)調(diào)壓力時，先導(dǎo)閥芯始終處于封閉狀態(tài)，此時主閥芯亦無相應(yīng)動作。當(dāng)液壓系統(tǒng)壓力上升，導(dǎo)緻先導(dǎo)閥內(nèi)部液壓壓力大于彈簧預(yù)調(diào)壓力，先導(dǎo)閥開啓，在阻尼孔的降壓作用下，主閥芯上、下産生壓力差，因此主閥芯上抬，原本密封的進(jìn)油路以及出油路相通，壓力油直接從進(jìn)油口到出油口，實現(xiàn)卸荷。

先導(dǎo)式溢流閥的結(jié)構(gòu)：

先導(dǎo)式溢流閥，其結(jié)構(gòu)分爲(wèi)兩個部分，先導(dǎo)部分是一個小規(guī)格的直動式溢流閥，其與主閥相連，兩者構(gòu)成先導(dǎo)式溢流閥。這樣的結(jié)構(gòu)特點使先導(dǎo)式溢流閥調(diào)節(jié)力矩大大小于直動式溢流閥，并且啓閉特性好。

先導(dǎo)式溢流閥根據(jù)使用環(huán)境的要求，可以選擇內(nèi)控內(nèi)洩，內(nèi)控外洩，外控內(nèi)洩，外控外洩等多種控制形式。內(nèi)控內(nèi)洩，指控制先導(dǎo)溢流閥的液壓油直接由進(jìn)口P口引入，先導(dǎo)控制閥溢流出的油液與主溢流閥溢流的油液一起，從閥的T口流出。外控，則主閥進(jìn)油口P與先導(dǎo)溢流閥控制腔的油路被阻斷，單獨引入控制油液從控制口X口進(jìn)入。外洩，則先導(dǎo)溢流閥溢流后的油液不通過主回路，單獨通過洩油口Y口洩油。

溢流閥由于其結(jié)構(gòu)特點決定不適合用于大流量液壓泵站中。一方面大流量環(huán)境直接造成溢流閥的調(diào)節(jié)手柄旋轉(zhuǎn)困難，甚至無法調(diào)節(jié)，影響工作。另一方面直動式溢流閥的結(jié)構(gòu)造成其啓閉特性相對比較差。因此直動式溢流閥用于小流量，要求不高 的液壓系統(tǒng)中。針對大流量，高精密要求的液壓站，一般選用先導(dǎo)式溢流閥。

電磁換向閥：
4WE-10A/E-G24-20 4WE-10A/E-W110-20 4WE-10A/E-W220-20 4WE-10A/E-W240-20 4WE-10B/E-G24-20 4WE-10B/E-W110-20
4WE-10B/E-W220-20 4WE-10B/E-W240-20 4WE-10C/E-G24-20 4WE-10C/E-W110-20 4WE-10C/E-W220-20 4WE-10C/E-W240-20
4WE-10D/E-G24-20 4WE-10D/E-W110-20 4WE-10D/E-W220-20 4WE-10D/E-W240-20 4WE-10E/E-G12-20 4WE-10E/E-W110-20
4WE-10E/E-W240-20 4WE-10F/E-G12-20 4WE-10F/E-W110-20 4WE-10F/E-W240-20 4WE-10G/E-G12-20 4WE-10G/E-W110-20
4WE-10G/E-W240-20 4WE-10P/E-W240-20 4WE-10V/E-W240-20 4WE-6-A/E-G12-20 4WE-6-A/E-G24-20 4WE-6-A/E-W110-20
4WE-6-A/E-W220-20 4WE-6-A/E-W240-20 4WE-6-AO/E-G12-20 4WE-6-AO/E-G24-20 4WE-6-AO/E-W110-20
4WE-6-AO/E-W220-20 4WE-6-AO/E-W240-20 4WE-6-AOF/E-G12-20 4WE-6-AOF/E-G24-20 4WE-6-AOF/E-W110-20
4WE-6-AOF/E-W220-20 4WE-6-AOF/E-W240-20 4WE-6-B/E-G12-20 4WE-6-B/E-G24-20 4WE-6-B/E-W110-20 4WE-6-B/E-W220-20
4WE-6-B/E-W240-20 4WE-6-BO/E-G12-20 4WE-6-BO/E-G24-20 4WE-6-BO/E-W110-20 4WE-6-BO/E-W220-20
4WE-6-BO/E-W240-20 4WE-6-BOF/E-G12-20 4WE-6-BOF/E-G24-20 4WE-6-BOF/E-W110-20 4WE-6-BOF/E-W220-20
4WE-6-BOF/E-W240-20 4WE-6-C/E-G12-20 4WE-6-C/E-G24-20 4WE-6-C/E-W110-20 4WE-6-C/E-W220-20 4WE-6-C/E-W240-20
4WE-6-CO/E-G12-20 4WE-6-CO/E-G24-20 4WE-6-CO/E-W110-20 4WE-6-CO/E-W220-20 4WE-6-CO/E-W240-20
4WE-6-COF/E-G12-20 4WE-6-COF/E-G24-20 4WE-6-COF/E-W110-20 4WE-6-COF/E-W220-20 4WE-6-COF/E-W240-20
4WE-6-D/E-G12-20 4WE-6-D/E-G24-20 4WE-6-D/E-W110-20 4WE-6-D/E-W220-20 4WE-6-D/E-W240-20 4WE-6-DO/E-G12-20
4WE-6-DO/E-G24-20 4WE-6-DO/E-W110-20 4WE-6-DO/E-W220-20 4WE-6-DO/E-W240-20 4WE-6-DOF/E-G12-20
4WE-6-DOF/E-G24-20 4WE-6-DOF/E-W110-20 4WE-6-DOF/E-W220-20 4WE-6-DOF/E-W240-20 4WE-6-E/E-G12-20
4WE-6-E/E-G24-20 4WE-6-E/E-W110-20 4WE-6-E/E-W220-20 4WE-6-E/E-W240-20 4WE-6-EO/E-G12-20 4WE-6-EO/E-G24-20
4WE-6-EO/E-W110-20 4WE-6-EO/E-W240-20 4WE-6-EOF/E-G12-20 4WE-6-EOF/E-G24-20 4WE-6-EOF/E-W110-20
4WE-6-EOF/E-W220-20 4WE-6-EOF/E-W240-20 4WE-6-F/E-G12-20 4WE-6-F/E-G24-20 4WE-6-F/E-W110-20 4WE-6-F/E-W220-20
4WE-6-F/E-W240-20 4WE-6-FO/E-G12-20 4WE-6-FO/E-G24-20 4WE-6-FO/E-W110-20 4WE-6-FO/E-W220-20
4WE-6-FO/E-W240-20 4WE-6-FOF/E-G12-20 4WE-6-FOF/E-G24-20 4WE-6-FOF/E-W110-20 4WE-6-FOF/E-W220-20
4WE-6-FOF/E-W240-20 4WE-6-G/E-G12-20 4WE-6-G/E-G24-20 4WE-6-G/E-W110-20 4WE-6G/E-W220/50-20 4WE-6-G/E-W220-20
4WE-6-G/E-W240-20 4WE-6-GO/E-G12-20 4WE-6-GO/E-G24-20 4WE-6-GO/E-W110-20 4WE-6-GO/E-W220-20
4WE-6-GO/E-W240-20 4WE-6-GOF/E-G12-20 4WE-6-GOF/E-G24-20 4WE-6-GOF/E-W110-20 4WE-6-GOF/E-W220-20
4WE-6-GOF/E-W240-20 4WE-6-H/E-G12-20 4WE-6-H/E-G24-20 4WE-6-H/E-W110-20 4WE-6-H/E-W220-20 4WE-6-H/E-W240-20
4WE-6-HA/E-W240-20 4WE-6-HO/E-G12-20 4WE-6-HO/E-G24-20 4WE-6-HO/E-W110-20 4WE-6-HO/E-W220-20
4WE-6-HO/E-W240-20 4WE-6-HOF/E-G12-20 4WE-6-HOF/E-G24-20 4WE-6-HOF/E-W110-20 4WE-6-HOF/E-W220-20
4WE-6-HOF/E-W240-20 4WE-6-J/E-G12-20 4WE-6-J/E-G24-20 4WE-6-J/E-W110-20 4WE-6-J/E-W220/50-20 4WE-6-J/E-W220-20
4WE-6-J/E-W240-20 4WE-6-JO/E-G12-20 4WE-6-JO/E-G24-20 4WE-6-JO/E-W110-20 4WE-6-JO/E-W220-20
4WE-6-JO/E-W240-20 4WE-6-JOF/E-G12-20 4WE-6-JOF/E-G24-20 4WE-6-JOF/E-W110-20 4WE-6-JOF/E-W220-20
4WE-6-JOF/E-W240-20 4WE-6-L/E-G12-20 4WE-6-L/E-G24-20 4WE-6-L/E-W110-20 4WE-6-L/E-W220-20 4WE-6-L/E-W240-20
4WE-6-LO/E-G12-20 4WE-6-LO/E-G24-20 4WE-6-LO/E-W110-20 4WE-6-LO/E-W220-20 4WE-6-LO/E-W240-20
4WE-6-LOF/E-G12-20 4WE-6-LOF/E-G24-20 4WE-6-LOF/E-W110-20 4WE-6-LOF/E-W220-20 4WE-6-LOF/E-W240-20
4WE-6-M/E-G12-20 4WE-6-M/E-G24-20 4WE-6-M/E-W110-20 4WE-6-M/E-W220-20 4WE-6-M/E-W240-20 4WE-6-MO/E-G12-20
4WE-6-MO/E-G24-20 4WE-6-MO/E-W110-20 4WE-6-MO/E-W220-20 4WE-6-MO/E-W240-20 4WE-6-MOF/E-G12-20
4WE-6-MOF/E-G24-20 4WE-6-MOF/E-W110-20 4WE-6-MOF/E-W220-20 4WE-6-MOF/E-W240-20 4WE-6-P/E-G12-20
4WE-6-P/E-G24-20 4WE-6-P/E-W110-20 4WE-6-P/E-W220-20 4WE-6-P/E-W240-20 4WE-6-PO/E-G12-20 4WE-6-PO/E-G24-20
4WE-6-PO/E-W110-20 4WE-6-PO/E-W220-20 4WE-6-PO/E-W240-20 4WE-6-POF/E-G12-20 4WE-6-POF/E-G24-20
4WE-6-POF/E-W110-20 4WE-6-POF/E-W220-20 4WE-6-POF/E-W240-20 4WE-6-Q/E-G12-20 4WE-6-Q/E-G24-20
4WE-6-Q/E-W110-20 4WE-6-Q/E-W220-20 4WE-6-Q/E-W240-20 4WE-6-QO/E-G12-20 4WE-6-QO/E-G24-20
4WE-6-QO/E-W110-20 4WE-6-QO/E-W220-20 4WE-6-QO/E-W240-20 4WE-6-R/E-G12-20 4WE-6-R/E-G24-20 4WE-6-R/E-W110-20
4WE-6-R/E-W220-20 4WE-6-R/E-W240-20 4WE-6-RO/E-G12-20 4WE-6-RO/E-G24-20 4WE-6-RO/E-W110-20 4WE-6-RO/E-W220-20
4WE-6-RO/E-W240-20 4WE-6-ROF/E-G12-20 4WE-6-ROF/E-G24-20 4WE-6-ROF/E-W110-20 4WE-6-ROF/E-W220-20
4WE-6-ROF/E-W240-20 4WE-6-T/E-G12-20 4WE-6-T/E-G24-20 4WE-6-T/E-W110-20 4WE-6-T/E-W220-20 4WE-6-T/E-W240-20
4WE-6-TO/E-G12-20 4WE-6-TO/E-G24-20 4WE-6-TO/E-W110-20 4WE-6-TO/E-W220-20 4WE-6-TO/E-W240-20
4WE-6-TOF/E-G12-20 4WE-6-TOF/E-G24-20 4WE-6-TOF/E-W110-20 4WE-6-TOF/E-W220-20 4WE-6-TOF/E-W240-20
4WE-6-U/E-G12-20 4WE-6-U/E-G24-20 4WE-6-U/E-W110-20 4WE-6-U/E-W220-20 4WE-6-U/E-W240-20 4WE-6-UO/E-G12-20
4WE-6-UO/E-G24-20 4WE-6-UO/E-W110-20 4WE-6-UO/E-W220-20 4WE-6-UO/E-W240-20 4WE-6-UOF/E-G12-20
4WE-6-UOF/E-G24-20 4WE-6-UOF/E-W110-20 4WE-6-UOF/E-W220-20 4WE-6-UOF/E-W240-20 4WE-6-V/E-G12-20
4WE-6-V/E-G24-20 4WE-6-V/E-W110-20 4WE-6-V/E-W220-20 4WE-6-V/E-W240-20 4WE-6-VO/E-G12-20 4WE-6-VO/E-G24-20
4WE-6-VO/E-W110-20 4WE-6-VO/E-W220-20 4WE-6-VO/E-W240-20 4WE-6-VOF/E-G12-20 4WE-6-VOF/E-G24-20
4WE-6-VOF/E-W110-20 4WE-6-VOF/E-W220-20 4WE-6-VOF/E-W240-20 4WE-6-Y/E-G12-20 4WE-6-Y/E-G24-20
4WE-6-Y/E-W110-20 4WE-6-Y/E-W220-20 4WE-6-Y/E-W240-20 4WE-6-YO/E-G12-20 4WE-6-YO/E-G24-20 4WE-6-YO/E-W110-20
4WE-6-YO/E-W220-20 4WE-6-YO/E-W240-20 4WE-6-YOF/E-G12-20 4WE-6-YOF/E-G24-20 4WE-6-YOF/E-W110-20
4WE-6-YOF/E-W220-20 4WE-6-YOF/E-W240-20 4WE-Q-QOF/E-G12-20 4WE-Q-QOF/E-G24-20 4WE-Q-QOF/E-W110-20
4WE-6-QOF/E-W220-20 4WE-Q-QOF/E-W240-20
液控方向閥：
DHG-04-2B2-ET-50-W110-10-AB-K DHG-04-2B2-ET-50-W240-10-AB-K DHG-04-2B3-ET-50-W110-10-AB-K
DHG-04-2B3-ET-50-W240-10-AB-K DHG-04-2D2-ET-50-W110-10-AB-K DHG-04-2D2-ET-50-W240-10-AB-K
DHG-04-2D3-ET-50-W110-10-AB-K DHG-04-2D3-ET-50-W240-10-AB-K DHG-04-3C2-ET-50-W110-10-AB-K
DHG-04-3C2-ET-50-W240-10-AB-K DHG-04-3C3-ET-50-W110-10-AB-K DHG-04-3C3-ET-50-W240-10-AB-K
DHG-04-3C4-ET-50-W110-10-AB-K DHG-04-3C4-ET-50-W240-10-AB-K DHG-04-3C5-ET-50-W110-10-AB-K
DHG-04-3C5-ET-50-W240-10-AB-K DHG-04-3C6-ET-50-W110-10-AB-K DHG-04-3C6-ET-50-W240-10-AB-K 
DHG-04-2B10B DHG-04-2B11A DHG-04-2B11B DHG-04-2B12A DHG-04-2B12B DHG-04-2B2 DHG-04-2B2A
DHG-04-2B2B DHG-04-2B2-ET-50-W110-10-AB-K DHG-04-2B2-ET-50-W240-10-AB-K DHG-04-2B2S DHG-04-2B3
DHG-04-2B3A DHG-04-2B3B DHG-04-2B3-ET-50-W110-10-AB-K DHG-04-2B3-ET-50-W240-10-AB-K DHG-04-2B3S
DHG-04-2B40A DHG-04-2B40B DHG-04-2B4A DHG-04-2B4B DHG-04-2B5A DHG-04-2B5B DHG-04-2B60A DHG-04-2B60B
DHG-04-2B6A DHG-04-2B6B DHG-04-2B8 DHG-04-2B8S DHG-04-2B9A DHG-04-2B9B DHG-04-2D2-ET-50-W110-10-AB-K
DHG-04-2D2-ET-50-W240-10-AB-K DHG-04-2D3-ET-50-W110-10-AB-K DHG-04-2D3-ET-50-W240-10-AB-K
DHG-04-2N2 DHG-04-2N3 DHG-04-3C10-50 DHG-04-3C11-50 DHG-04-3C12-50 DHG-04-3C2 DHG-04-3C2-50
DHG-04-3C2-ET-50-W110-10-AB-K DHG-04-3C2-ET-50-W240-10-AB-K DHG-04-3C3-50 DHG-04-3C3-ET-50-W110-10-AB-K
DHG-04-3C3-ET-50-W240-10-AB-K DHG-04-3C40-50 DHG-04-3C4-50 DHG-04-3C4-ET-50-W110-10-AB-K
DHG-04-3C4-ET-50-W240-10-AB-K DHG-04-3C5-50 DHG-04-3C5-ET-50-W110-10-AB-K DHG-04-3C5-ET-50-W240-10-AB-K
DHG-04-3C60-50 DHG-04-3C6-50 DHG-04-3C6-ET-50-W110-10-AB-K DHG-04-3C6-ET-50-W240-10-AB-K DHG-04-3C9-50
DHG-06-2B10B DHG-06-2B11A DHG-06-2B11B DHG-06-2B12A DHG-06-2B12B DHG-06-2B2 DHG-06-2B2A
DHG-06-2B2B DHG-06-2B2S DHG-06-2B3 DHG-06-2B3A DHG-06-2B3B DHG-06-2B3S DHG-06-2B40A DHG-06-2B40B
DHG-06-2B4A DHG-06-2B4B DHG-06-2B5A DHG-06-2B5B DHG-06-2B60A DHG-06-2B60B DHG-06-2B6A DHG-06-2B6B
DHG-06-2B8 DHG-06-2B8S DHG-06-2B9A DHG-06-2B9B DHG-06-2N2 DHG-06-2N3 DHG-06-3C10-50 DHG-06-3C11-50
DHG-06-3C12-50 DHG-06-3C2-50 DHG-06-3C3-50 DHG-06-3C40-50 DHG-06-3C4-50 DHG-06-3C5-50 DHG-06-3C60-50
DHG-06-3C6-50 DHG-06-3C9-50 DHG-10-2B10B DHG-10-2B11B DHG-10-2B12B DHG-10-2B2B DHG-10-2B3B
DHG-10-2B40B DHG-10-2B4B DHG-10-2B5B DHG-10-2B60B DHG-10-2B6B DHG-10-2B9B DHG-10-2N2 DHG-10-2N3
DHG-10-3C10-50 DHG-10-3C11-50 DHG-10-3C12-50 DHG-10-3C2-50 DHG-10-3C3-50 DHG-10-3C40-50 DHG-10-3C4-50
DHG-10-3C5-50 DHG-10-3C60-50 DHG-10-3C6-50 DHG-10-3C9-50
S-DSHG-10-3H60A220 S-DSHG-10-3H60-A220 S-DSHG-10-3H60-E-D24
抗衡閥：
J-CBEA-1-L J-PBC-A-L J-PBC-B-L J-PBC-D-L J-PBE-A-L J-PBE-B-L J-PBE-D-L J-PBG-A-L J-PBG-B-L J-PBG-D-L
溢流閥：
MRV-02-A-1-A-K MRV-02-A-1-B-K MRV-02-B-1-A-K MRV-02-B-1-B-K MRV-02-B-2-B MRV-02-P-1-A-K MRV-02-P-1-B
MRV-02-P-1-B-K MRV-02-P-3-B MRV-03-A-2-B-K MRV-03-A-2-B-L MRV-03-B-2-B-K MRV-03-B-2-B-L MRV-03-B-3-B
MRV-03-P-2-B-K MRV-03-P-2-B-L MRV-03-P-3-B MSCV-03-A-3-B
電磁控制溢流閥：
SBSG-03-1PN-1-L-30-10 SBSG-03-1PN-1-R-30-10 SBSG-03-1PN-2-L-30-10 SBSG-03-1PN-2-R-30-10 SBSG-03-1PN-3-L-30-10
SBSG-03-1PN-3-R-30-10 SBSG-06-1PN-1-L-30-10 SBSG-06-1PN-1-R-30-10 SBSG-06-1PN-2-L-30-10 SBSG-06-1PN-2-R-30-10
SBSG-06-1PN-3-L-30-10 SBSG-06-1PN-3-R-30-10 SBSG-10-1PN-1-L-30-10 SBSG-10-1PN-1-R-30-10 SBSG-10-1PN-2-L-30-10
SBSG-10-1PN-2-R-30-10 SBSG-10-1PN-3-L-30-10 SBSG-10-1PN-3-R-30-10