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供應(yīng)力士樂溢流閥
安全保護(hù)作用:系統(tǒng)正常工作時(shí),閥門關(guān)閉。只有負(fù)載超過規(guī)定的極限(系統(tǒng)壓力超過調(diào)定壓力)時(shí)開啟溢流,進(jìn)行過載保護(hù).流閥工作時(shí),是利用彈簧的壓力來調(diào)節(jié)、控制液壓油的壓力大小。當(dāng)液壓油的壓力小于工作需要壓力時(shí),閥芯被彈簧壓在液壓油的流入口,當(dāng)液壓油的壓力超過其工作允許壓力即大于彈簧壓力時(shí),閥芯被液壓油頂起,液壓油流入,從方向右側(cè)口流出,回油箱。液壓油的壓力越大,閥芯被液壓油頂起得越髙,液壓油經(jīng)溢流閥流回油箱的流量越大,如過液壓油的壓力小于或等于彈簧壓力,則閥芯落下,封住液壓油進(jìn)口。由于油泵輸出的液壓油壓力固定,而工作油缸用液壓油的壓力總要比油泵輸出液壓油壓力小,所以正常工作時(shí)總會有一些液壓油從溢流閥處流回油箱,以保持液壓油缸的工作壓力平衡、正常工作。由此可見,溢流閥的作用是能夠防止液壓系統(tǒng)中的液壓油壓力超出額定負(fù)荷,起安全保護(hù)作用。另外,溢流閥與節(jié)流閥配合,節(jié)流閥調(diào)節(jié)液壓油的流量大小,可控制活塞的移動(dòng)速度。
溢流閥是一種液壓壓力控制閥,在液壓設(shè)備中主要起定壓溢流作用,穩(wěn)壓,系統(tǒng)卸荷和安全保護(hù)作用。溢流閥的作用 定壓溢流作用:在定量泵節(jié)流調(diào)節(jié)系統(tǒng)中,定量泵提供的是恒定流量。當(dāng)系統(tǒng)壓力增大時(shí),會使流量需求減小。此時(shí)溢流閥開啟,使多余流量溢回油箱,保證溢流閥進(jìn)口壓力,即泵出口壓力恒定(閥口常隨壓力波動(dòng)開啟)。
穩(wěn)壓作用:溢流閥串聯(lián)在回油路上,溢流閥產(chǎn)生背壓,運(yùn)動(dòng)部件平穩(wěn)性增加。
系統(tǒng)卸荷作用:在溢流閥的遙控口串接溢小流量的電磁閥,當(dāng)電磁鐵通電時(shí),溢流閥的遙控口通油箱,此時(shí)液壓泵卸荷。溢流閥此時(shí)作為卸荷閥使用。 安全保護(hù)作用:系統(tǒng)正常工作時(shí),閥門關(guān)閉。只有負(fù)載超過規(guī)定的極限(系統(tǒng)壓力超過調(diào)定壓力)時(shí)開啟溢流,進(jìn)行過載保護(hù),使系統(tǒng)壓力不再增加(通常使溢流閥的調(diào)定壓力比系統(tǒng)*高工作壓力高10%~20%)。
實(shí)際應(yīng)用中一般有:作卸荷閥用,作遠(yuǎn)程調(diào)壓閥,作高低壓多級控制閥,作順序閥,用于產(chǎn)生背壓(串在回油路上)。
溢流閥一般有兩種結(jié)構(gòu):1、直動(dòng)型溢流閥 。2、先導(dǎo)式溢流閥。
對溢流閥的主要要求:調(diào)壓范圍大,調(diào)壓偏差小,壓力振擺小,動(dòng)作靈敏,過載能力大,噪聲小。
德國力士樂Rexroth溢流閥部分型號如下:
溢流閥DBDS系列
R900420245 DBDS6K1X/25
R900423727 DBDS6K1X/50
R900423723 DBDS6K1X/100
R900423724 DBDS6K1X/200
R900423725 DBDS6K1X/315
R900423726 DBDS6K1X/400
R900420276 DBDS10K1X/25
R900424153 DBDS10K1X/5O
R900424147 DBDS10K1X/100
R900424149 DBDS10K1X/2O0
R900424150 DBDS10K1X/315
R900424152 DBDS10K1X/400
R900427601 DBDS10K1X/630
R900422542 DBDS20K1X/25
R900424205 DBDS20K1X/50
R900424267 DBDS20K1X/100
R900424271 DBDS20K1X/315
R900424203 DBDS20K1X/400
R900422543 DBDS30K1X/25
R900424282 DBDS30K1X/50
R900424284 DBDS30K1X/100
R900424286 DBDS30K1X/200
Rd00424286 DBDS30K1X/315
R900423718 DBDS6G1X/25
R900423722 DBDS6G1X/50
R900423717 DBDS6G1X/100
R900423719 DBDS6G1X/200
R900423720 DBDS6G1X/315
R900423721 DBDS6G1X/400
R900429414 DBDS6P1X/25
R900423732 DBDS6P1X/50
R900423728 DBDS6P1X/100
R900423729 DBDS6P1X/200
R900423730 DBDS6P1X/315
R900423731 DBDS6P1X/400
溢流閥DBDA系列
R900423780 DBDA6K1X/25
R90042S083 DBDA6K1X/S0
R900425080 DBDA6K1X/100
R900425081 DBDA6K1X/200
R900425082 DBDA6K1X/315
R900428387 DBDA6K1X/4O0
R900427600 DBDH6K1X/25
R900424734 DBDH6K1X/S0
R900424199 DBDH6K1X/100
R900424200 DBDH6K1X/2O0
R900424201 DBDH6K1X/315
R900424202 DBDH6K1X/400
R900430305 DBDA10K1X/2S
R900425966 DBDA10K1X/50
R900425161 DBDA10K1X/100
R900425162 DBDA10K1X/200
R900425164 DBDA10K1X/315
R900425165 DBDA10K1X/400
R900426635 DBDA10K1X/630
R900432465 DBDA6G1X/25
R900424177 DBDA6G1X/50
R900425076 DBDA661X/100
R900426477 DBDA6G1X/200
R900426478 DBDA661X/315
R900428382 DBDA6G1X/400
R900426897 DBDH6G1X/25
R900424198 DBDH661X/50
R900424195 DBDH661X/100
R900424196 DBDH6G1X/200
R900424197 DBDH6G1X/315
R900424348 DBDH6G1X/400
R900430378 DBDH6P1X/25
R900428385 DBDH6P1X/50
R900424246 DBDH6P1X/100
R900427242 DBDH6P1X/200
R900424266 DBDH6P1X/315
R900434128 DBDH6P1X/400
R900424180 DBDH10G1X/50
R900424188 DBDH10G1X/100
R900424178 DBDH10G1X/200
R900424189 DBDH10G1X/315
R900423739 DBDH10G1X/630
R900445875 DBDH30K1X/25
R900424193 DBDH30K1X/50
R900423028 DBDH20K1X/25
R900424112 DBDH20K1X/50
R900424109 DBDH20K1X/100
R900435222 DBDH10K1X/25
R900424185 DBDH10K1X/S0
R900423891 DBDH10K1X/100
R900424190 DBDH10K1X/200
R900424183 DBDH10K1X/315
R900424184 DBDH10K1X/400
R900433807 DBDH10K1X/630
溢流閥先導(dǎo)式DB
R900590645 DB10-2-5X/50
R900590646 DB10-2-5X/100
R900587772 DB10-2-5X/200
R900590334 DB10-2-5X/315
R900597992 DB10-2-5X/350
R900597212 DB10-2-5X/50
R900589433 DB20-2-5X/100
R900590768 DB20-2-5X/200
R900593530 DB20-2-5X/315
R900590618 DB20-2-5X/350
R900590328 DB20G2-5X/50
R900597307 DB20G2-5X/200
R900597747 DB20G2-5X/315
R900599232 DB20G2-5X/350
R900593564 DB30-2-5X/50
R900594677 DB30-2-5X/100
R900588131 DB30-2-5X/200
R900591128 DB30-2-5X/315
R900504902 DB30-2-5X/350
R901051933 DB3U 10 H1-5X/315-6EG24N9K4
R900911453 DB3U 10 H2-5X/100-6EG24K4
R900949067 DB3U 10 H2-5X/100-6EG24N9K4
R900955024 DB3U 10 H2-5X/100-6EW110N9K4
R901121185 DB3U 10 H2-5X/100-6EW230N9K4
R900959064 DB3U 10 H2-5X/100U6EG24N9K4
R901216698 DB3U 10 H2-5X/100Y6EG24N9K4
R900723678 DB3U 10 H2-5X/100YU6EG24N9K4
R900928220 DB3U 10 H2-5X/100YU6EW230N9K4
R900924809 DB3U 10 H2-5X/200-6EW110N9K4V
R901269809 DB3U 10 H2-5X/200U6EG24N9K4
R901153630 DB3U 10 H2-5X/200Y6EG24N9K4
R900939426 DB3U 10 H2-5X/315-6EG205N9K4
R900951841 DB3U 10 H2-5X/315-6EG24N4K4
R900943647 DB3U 10 H2-5X/315-6EG24N5K4
R900701668 DB3U 10 H2-5X/315-6EG24N9DLV
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