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导阀的轴向开口很小，仅0.003～0.006厘米。过流面积很小，流速很高，可达200米/秒，易引起压力分布不均匀，使锥阀径向力不平衡而产生振动。另外锥阀和锥阀座加工时产生的椭圆度、导阀口的脏物粘住及调压弹簧变形等，也会引起锥阀的振动。所以一般认为导阀是发生噪声的振源部位。由于有弹性元件（弹簧）和运动质量（锥阀）的存在，构成了一个产生振荡的条件，而导阀前腔又起了一个共振腔的作用，所以锥阀发生振动后易引起整个阀的共振而发出噪声，发生噪声时一般多伴随有剧烈的压力跳动。先导式溢流阀发出的机械噪声，一般来自零件的撞击和由于加工误差等产生的零件磨擦。在先导型溢流阀发出的噪声中，有时会有机械性的高频振动声，一般称它为自激振动声。
| 力士乐现货 | R911260464 | MKD041B-144-KG0-KN |
| 力士乐现货 | R911260465 | MKD041B-144-KG1-KN |
| 力士乐现货 | R911260468 | MKD071B-061-KG1-KN |
| 力士乐现货 | R911260647 | IKS0101/000,0(INS0564-INK0572-INS0768) |
| 力士乐现货 | R911261055 | 1MS160N-4A-A1 |
| 力士乐现货 | R911261313 | MKD041B-144-GP1-KN |
| 力士乐现货 | R911261314 | MKD071B-061-GP0-KN |
| 力士乐现货 | R911261680 | MKD041B-144-GP0-KN |
| 力士乐现货 | R911261681 | MKD071B-061-GG1-KN |
| 力士乐现货 | R911261682 | MKD071B-061-GP1-KN |
| 力士乐现货 | R911261989 | MKD071B-061-KP1-KN |
| 力士乐现货 | R911262307 | MKD041B-144-KP1-KN |
| 力士乐现货 | R911262599 | MKD071B-061-KP0-KN |
| 力士乐现货 | R911262600 | MKD041B-144-KP0-KN |
| 力士乐现货 | R911262939 | MKD090B-047-KG1-KN |
| 力士乐现货 | R911263066 | MKD090B-047-GG0-KN |
| 力士乐现货 | R911267214 | INS0379/C01(CN-0017S-ROUN-SCREW-****) |
| 力士乐现货 | R911267237 | MKD025B-144-KP1-KN |
| 力士乐现货 | R911269803 | INS0542/K01(CONNECTOR*SET-*****-****) |
| 力士乐现货 | R911270356 | INS0484/C06(FC-04ROUN-BAYON-700V) |
| 力士乐现货 | R911271274 | SUP-M01-HD |
| 力士乐现货 | R911272185 | INS0682/C03(CP-04+5P-ROUN-SCREW-630V) |
| 力士乐现货 | R911274029 | MHD041B-144-NG0-UN |
| 力士乐现货 | R911274054 | MHD041B-144-PG1-UN |
| 力士乐现货 | R911274565 | MKD071B-035-KP0-KN |
| 力士乐现货 | R911274568 | MKD090B-035-GG0-KN |
| 力士乐现货 | R911276963 | SUP-M01-DKC**.3-040 |
| 力士乐现货 | R911277914 | IKS4103/005,0(INS0672-INK0448-INS0760) |
| 力士乐现货 | R911277915 | IKS4103/010,0(INS0672-INK0448-INS0760) |
| 力士乐现货 | R911278139 | IKB0003/00 |
| 力士乐现货 | R911278141 | IKB0005/002,0(INS0760-INK0572-INS0768) |
| 力士乐现货 | R911278144 | IKB0005/005,0(INS0760-INK0572-INS0768) |
| 力士乐现货 | R911279426 | DKC01.3-040-7-FW |
| 力士乐现货 | R911279427 | DKC02.3-040-7-FW |
| 力士乐现货 | R911279428 | DKC03.3-040-7-FW |
| 力士乐现货 | R911279430 | DKC02.3-100-7-FW |
| 力士乐现货 | R911279432 | DKC11.3-100-7-FW |
| 力士乐现货 | R911279433 | DKC11.3-040-7-FW |
| 力士乐现货 | R911279873 | MHD041B-144-PP0-UN |
| 力士乐现货 | R911281505 | MHD041B-144-NP1-UN |
| 力士乐现货 | R911281700 | INS0701/C01(CN-0009S-ROUN-SCREW-****) |
| 力士乐现货 | R911283641 | INS0652/L01(CN-0025S-DSUB-SCREW-****) |
| 力士乐现货 | R911285595 | FWA-ECODR3-FGP-03VRS-MS |
| 力士乐现货 | R911285655 | FWA-ECODR3-SMT-02VRS-MS |
| 力士乐现货 | R911286827 | INS0672/C01(CONNECTOR*SET-*****-****) |
| 力士乐现货 | R911286917 | NFD03.1-480-007 |
| 力士乐现货 | R911286918 | NFD03.1-480-016 |
| 力士乐现货 | R911286919 | NFD03.1-480-030 |
| 力士乐现货 | R911286920 | NFD03.1-480-055 |
| 力士乐现货 | R911289001 | BGRDKC02.3LKSCK02 |
| 力士乐现货 | R911289341 | R-IBILFIELD2 |
| 力士乐现货 | R911295322 | HMD01.1N-W0020-A-07-NNNN |
| 力士乐现货 | R911295323 | HMS01.1N-W0020-A-07-NNNN |
| 力士乐现货 | R911295324 | HMS01.1N-W0036-A-07-NNNN |
| 力士乐现货 | R911295325 | HMS01.1N-W0054-A-07-NNNN |
| 力士乐现货 | R911295326 | HMS01.1N-W0070-A-07-NNNN |
| 力士乐现货 | R911295328 | HMS01.1N-W0210-A-07-NNNN |
| 力士乐现货 | R911295578 | MSM040B-0300-NN-M0-CC0 |
| 力士乐现货 | R911295609 | DKC10.3-004-3-MGP-01VRS |
| 力士乐现货 | R911295648 | SUP-E03-DKC*CS-BATTRY |
| 力士乐现货 | R911296708 | IKB0041/002,0(INS0457-*******-INS0663) |
| 力士乐现货 | R911296710 | IKB0041/005,0(INS0457-*******-INS0663) |
| 力士乐现货 | R911296724 | HMV01.1E-W0030-A-07-NNNN |
| 力士乐现货 | R911296725 | HMV01.1R-W0045-A-07-NNNN |
| 力士乐现货 | R911296958 | PFM02.1-016-FW |
| 力士乐现货 | R911297164 | HMS01.1N-W0150-A-07-NNNN |
| 力士乐现货 | R911297340 | INS0760/C01(CN-0015P-DSUB-SCREW-****) |
| 力士乐现货 | R911297361 | INS0760/L01(CN-0015P-DSUB-SCREW-****) |
| 力士乐现货 | R911297424 | HMV01.1E-W0075-A-07-NNNN |