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起重机变幅缸在工作过程中其受力，负载方向始终保持不变，因此我们可以采取液压缸有杆控用压力控制、无杆腔用流量控制的控制策略。
无杆腔流量控制是通过检测连接到无杆腔侧阀前后两侧的压差，再根据所需流入或流出流量的多少DGMX1-3-PP-CK-B-40
DGMC-3-AT-CH-41
DGMPC-3-D-ABN-41
DGMC-3-BA-AW-41
DGMX1-3-PP-BH-B-40
DGMC2-3-AB-CW-BA-CW-41-EN103
DGMC2-3-AB-CW-BA-CW-41-EN104
DGMX1-3-PP-CH-B-40
DGMR-3-TB-AW-B-40
DGMC-3-AT-AW-B-41
DGMPC-3-D-BAM-41
DGMC-3-PT-BH-B-41
DGMC-3-BT-CH-41
DGMX1-3-PP-RH-B-40
DGMX1-3-PB-AK-B-40
DGMC2-3-AB-CW-BA-CW-41-EN74
DGMX1-3-PP-RW-B-40
DGMPC-3-ABN-41-EN6
DGMPC-3-ABK-BAK-41
DGMFN-3-Y-A1W-B1W-41
DGMFN-3-Y-A2W-B2W-41
DGMFN-3-X-A1W-B1W-41
DGMFN-3-X-A2W-B2W-41
DGMDC-3-Y-PK-41
DGMDC-3-X-TK-41
DGMC-3-PT-CW-41
DGMC2-3-AB-BW-BA-BW-41
DGMC2-3-AB-CW-BA-CW-41
DGMDC-3-X-AK-41
DGMDC-3-X-BK-41
DGMDC-3-Y-AK-41
DGMDC-3-Y-BK-41
DGMC-3-PT-BW-41
DGMC-3-PT-GW-41
DGMPC-3-BAK-41
DGMPC-3-ABK-41
DGMDC-3-X-TM-41
DGMFN-3-Z-P1W-41
DGMFN-3-Z-T1W-41
DGMFN-3-Z-P2W-41
DGMFN-3-Z-T2W-41
DGMC2-3-AT-CW-BT-CW-41
DGMC-3-PT-CW-B-41
DGMFN-3-X-B2W-41
DGMC-3-PT-GW-B-41
DGMC-3-AB-CW-41
DGMC-3-BA-BW-41
DGMC-3-BA-GW-41
DGMC-3-BT-CW-41
DGMDC-3-X-BN-41
DGMC2-3-AT-BW-BT-BW-41，计算出阀芯开口大小；有杆腔侧采用压力控制，使该侧维持一个低值的压力，使得更加节能、高效。
由于我们在无杆腔采用了流量控制，因此原控制系统中所用的平衡阀可用一个液控单向阀来代替。这样可消除因平衡阀所带来的系统不稳定，从而提高系统稳定性。
DGMPC-5-BAK-30
DGMPC-5-BAK-30
DGMPC-7-ABK-20
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DGMC-3-BT-BW-41
DGMC-3-BT-CH-41
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电磁阀线圈481865C2 DC24V
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溢流阀DGMC2-3-AB-GW-BA-GW-41
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电磁阀线圈C-507826 220V
溢流阀DGMC-5-PT-FW-B-30
溢流阀DGMC2-3-AT-CW-BT-C2-41
电磁阀插装阀SV13-10-CM-O-240AGH
溢流阀DGMC2-5-AT-FW-BT-FW-B-30
液压阀CG2V-6GW-10
威格电磁阀DG4V-36C-M-U-D-6-60
电磁阀DG4V-5-OCJ-M-U-H6-20
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电磁阀线圈02-178109
电磁阀DG4V-3S-2N-M-U-H5-60
插装阀RV5-10-S-0-50
电磁阀线圈617471L
电磁阀DG4V-3S-6C-M-U-H5-60
电磁球阀DG3VP-3-102A-VM-U-H-10
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叶片泵25V-21A-1C-22R
叶片泵V20-1P12P-1D11
叶片泵45V-50A-1C-22R
液压阀DGMFN-5-Y-A2W-B2W-30
电磁阀线圈507833
电磁阀DG4V-5-2NJ-M-U-H6-20
阀芯SV3-10-0-0-00+线圈300AA00082A电压24V
小液动阀DG3V-3-2N-7-B-60
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电磁阀DG4V-30C-M-U-D-6-60
电磁换向阀DG4V-5-2CJ-M-U-H5-40
电磁阀线圈300AA00126A
电磁阀线圈617476
电磁阀DG4V-3S-7C-M-U-H5-60
DG4V-3-2N-M-U-H-7-60
电磁阀线圈02-178087
