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外嚙合齒輪泵的工作原理外嚙合齒輪泵的工作原理及結(jié)構(gòu)

2022-11-16 閱讀次數(shù):

外嚙合齒輪泵的組成:前、后泵蓋,泵體,一對(duì)齒數(shù)、模數(shù)、齒形完全相同的漸開(kāi)線外嚙合。 工作原理: 密封容積形成—齒輪、泵體內(nèi)表面、前后泵蓋圍成齒輪退出嚙合,容積↑吸油 容積變化↓壓油 吸壓油口隔開(kāi)—兩齒輪嚙合線及泵蓋外嚙合齒輪泵的流量計(jì)算 由于齒輪嚙合時(shí),嚙合點(diǎn)的位置瞬時(shí)變化,其工作體積變化率不同,因此瞬時(shí)流量不均勻,即脈動(dòng)。在計(jì)算瞬時(shí)流量時(shí),必須準(zhǔn)確計(jì)算積分,這很麻煩。近似計(jì)算法常用。 排量計(jì)算 假設(shè):齒槽容積=輪齒體積 即相當(dāng)于有效齒高和齒寬所構(gòu)成的平面所掃過(guò)的環(huán)形體積,則V=πdhb=2πzm2b。 實(shí)際上,由于齒槽體積>輪齒體積,所以取出V=6.66zm2b流量計(jì)算 結(jié)論: 1齒輪泵的qt是齒輪幾何參數(shù)和轉(zhuǎn)速的函數(shù) 2∵轉(zhuǎn)速等于常數(shù),流量等于常數(shù) ∴定量泵 3理論流量與出口壓力無(wú)關(guān)瞬時(shí)流量 由于每對(duì)輪齒嚙合時(shí)嚙合點(diǎn)位置的變化會(huì)導(dǎo)致瞬時(shí)流量變化,因此會(huì)出現(xiàn)流量脈動(dòng) 流動(dòng)脈動(dòng)結(jié)果:引起系統(tǒng)壓力脈動(dòng),產(chǎn)生振動(dòng)和噪聲,影響傳動(dòng)穩(wěn)定性。 外嚙合齒輪泵結(jié)構(gòu)要點(diǎn): 困油及其消除措施 徑向作用力不平衡 泄漏困油現(xiàn)象產(chǎn)生原因: 由于為保證齒輪連續(xù)平穩(wěn)運(yùn)轉(zhuǎn),又能夠使吸壓油口隔開(kāi),齒輪嚙合時(shí)的重合度必須大于1,所以有時(shí)會(huì)出現(xiàn)兩對(duì)輪齒同時(shí)嚙合的情況,故在齒向嚙合線間形成一個(gè)封閉容積 困油引起的結(jié)果: a→b容積縮小p↑高壓油從一切可能泄漏的縫隙強(qiáng)行擠出,使軸和軸承受很大沖擊載荷,泵劇烈振動(dòng),同時(shí)無(wú)功損耗增大,油液發(fā)熱。b→c容積增大p↓形成局部真空,產(chǎn)生氣穴,引起振動(dòng)、噪聲、汽蝕等 總之:由于困油現(xiàn)象,使泵工作性能不穩(wěn)定,產(chǎn)生振動(dòng)、噪聲等,直接影響泵的工作壽命。 消除困油的方法 原則:a→b密封容積減小,使之通壓油口,b→c密封容積增大,使之通吸油口,b密封容積最小,隔開(kāi)吸壓油方法:在泵蓋(或軸承座)上開(kāi)卸荷槽以消除困油,CB-B形泵將卸荷槽整個(gè)向吸油腔側(cè)平移一段距離,效果更好 90-L-055-MA-1-NN-60-S-3-S1-C-05-GBA-32-32-24 90L055MA1NN60S3S1C05GBA323224 90-L-055-MA-1-NN-60-S-3-S1-D-03-GBA-32-32-24 90L055MA1NN60S3S1D03GBA323224 90-L-055-MA-1-NN-60-S-3-S1-D-03-GBA-35-35-24 90L055MA1NN60S3S1D03GBA353524 90-L-055-MA-1-NN-60-S-4-S1-C-03-GBA-35-35-24 90L055MA1NN60S4S1C03GBA353524 90-L-055-MA-1-NN-61-P-4-S1-C-03-GBA-23-23-24 90L055MA1NN61P4S1C03GBA232324 90-L-055-MA-1-NN-61-R-3-C6-D-05-GBA-32-32-24 90L055MA1NN61R3C6D05GBA323224 90-L-055-MA-1-NN-61-R-3-T1-C-03-GBA-35-35-24 90L055MA1NN61R3T1C03GBA353524 90-L-055-MA-1-NN-61-S-3-S1-C-03-GBA-35-35-24 90L055MA1NN61S3S1C03GBA353524 90-L-055-MA-1-NN-80-L-3-C6-C-09-GBA-45-45-20 90L055MA1NN80L3C6C09GBA454520 90-L-055-MA-1-NN-80-P-3-C6-B-09-GBA-45-45-24 90L055MA1NN80P3C6B09GBA454524 90-L-055-MA-1-NN-80-P-3-S1-C-03-GBA-38-38-24 90L055MA1NN80P3S1C03GBA383824 90-L-055-MA-1-NN-80-P-3-S1-C-03-GBA-42-42-24 90L055MA1NN80P3S1C03GBA424224 90-L-055-MA-1-NN-80-P-3-S1-D-03-GBA-38-38-24 90L055MA1NN80P3S1D03GBA383824 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-14-14-20 90L055MA1NN80R3S1C03GBA141420 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-14-14-20-P000 90L055MA1NN80R3S1C03GBA141420P000 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-14-14-24 90L055MA1NN80R3S1C03GBA141424 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-17-17-24 90L055MA1NN80R3S1C03GBA171724 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-26-26-24 90L055MA1NN80R3S1C03GBA262624 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-35-35-24 90L055MA1NN80R3S1C03GBA353524 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-35-35-24-N180 90L055MA1NN80R3S1C03GBA353524N180 90-L-055-MA-1-NN-80-R-3-S1-C-03-GBA-38-38-24 90L055MA1NN80R3S1C03GBA383824 90-L-055-MA-1-NN-80-R-4-S1-C-03-GBA-35-14-24 90L055MA1NN80R4S1C03GBA351424 90-L-055-MA-1-NN-80-R-4-S1-C-03-GBA-42-42-24 90L055MA1NN80R4S1C03GBA424224 90-L-055-MA-1-NN-80-R-4-S1-D-03-GBA-14-14-20 90L055MA1NN80R4S1D03GBA141420 90-L-055-MA-1-NN-80-S-3-C6-C-03-GBA-35-35-24 90L055MA1NN80S3C6C03GBA353524 90-L-055-MA-1-NN-80-S-3-C6-C-03-GBA-42-42-20 90L055MA1NN80S3C6C03GBA424220 90-L-055-MA-1-NN-80-S-3-C6-C-03-GBA-42-42-24 90L055MA1NN80S3C6C03GBA424224 90-L-055-MA-1-NN-80-S-3-C6-D-03-GBA-35-35-24 90L055MA1NN80S3C6D03GBA353524 90-L-055-MA-1-NN-80-S-3-S1-B-03-GBA-32-32-24 90L055MA1NN80S3S1B03GBA323224 90-L-055-MA-1-NN-80-S-3-S1-C-02-GBA-23-23-24 90L055MA1NN80S3S1C02GBA232324 90-L-055-MA-1-NN-80-S-3-S1-C-03-GBA-23-23-24 90L055MA1NN80S3S1C03GBA232324 90-L-055-MA-1-NN-80-S-3-S1-C-03-GBA-29-29-20 90L055MA1NN80S3S1C03GBA292920 90-L-055-MA-1-NN-80-S-3-S1-C-03-GBA-35-35-20 90L055MA1NN80S3S1C03GBA353520 90-L-055-MA-1-NN-80-S-3-S1-C-03-GBA-35-35-24 90L055MA1NN80S3S1C03GBA353524 90-L-055-MA-1-NN-80-S-3-S1-C-03-GBA-42-42-24 90L055MA1NN80S3S1C03GBA424224 90-L-055-MA-1-NN-80-S-3-T1-C-03-GBA-20-20-20 90L055MA1NN80S3T1C03GBA202020 90-L-055-MA-1-NN-80-S-3-T1-C-03-GBA-35-35-20 90L055MA1NN80S3T1C03GBA353520 90-L-055-MA-1-NN-80-S-4-S1-C-03-GBA-26-26-24 90L055MA1NN80S4S1C03GBA262624 90-L-055-MA-1-NN-80-S-4-S1-C-03-GBA-35-35-24 90L055MA1NN80S4S1C03GBA353524 90-L-055-MA-2-AB-60-P-3-S1-C-03-GBA-45-45-20 90L055MA2AB60P3S1C03GBA454520 90-L-055-MA-2-BC-60-P-3-C6-C-03-GBA-42-42-24 90L055MA2BC60P3C6C03GBA424224 90-L-055-MA-2-CD-80-P-4-C6-B-03-GBA-32-32-24 90L055MA2CD80P4C6B03GBA323224 90-L-055-MA-2-NN-80-L-3-C6-D-03-GBA-42-42-24 90L055MA2NN80L3C6D03GBA424224 90-L-055-MA-2-NN-80-P-4-S1-B-03-GBA-32-32-24 90L055MA2NN80P4S1B03GBA323224 90-L-055-MA-5-AB-60-P-3-C6-C-C6-GBA-42-42-24 90L055MA5AB60P3C6CC6GBA424224 90-L-055-MA-5-BB-60-S-4-C6-D-C5-GBA-32-32-24 90L055MA5BB60S4C6DC5GBA323224 90-L-055-MA-5-BC-60-S-3-C6-C-C5-GBA-35-35-24 90L055MA5BC60S3C6CC5GBA353524 90-L-055-MA-5-BC-60-S-3-C6-C-C5-GBA-38-38-24 90L055MA5BC60S3C6CC5GBA383824 90-L-055-MA-5-BC-60-S-3-C6-D-C5-GBA-35-35-24 90L055MA5BC60S3C6DC5GBA353524 90-L-055-MA-5-BC-60-S-4-C6-C-C5-GBA-32-32-24 90L055MA5BC60S4C6CC5GBA323224 90-L-055-MA-5-BC-60-S-4-C6-C-C5-GBA-40-40-24 90L055MA5BC60S4C6CC5GBA404024 90-L-055-MA-5-BC-60-S-4-S1-C-C5-GBA-35-35-24 90L055MA5BC60S4S1CC5GBA353524 90-L-055-MA-5-CD-60-S-3-C6-C-C5-GBA-42-42-24 90L055MA5CD60S3C6CC5GBA424224 90-L-055-MA-5-NN-60-S-3-C6-C-C5-GBA-35-35-24 90L055MA5NN60S3C6CC5GBA353524 90-L-055-MA-5-NN-80-R-3-S1-C-C5-GBA-26-26-24 90L055MA5NN80R3S1CC5GBA262624 90-L-055-MA-5-NN-80-S-3-S1-C-C5-GBA-35-35-24 90L055MA5NN80S3S1CC5GBA353524 90-L-055-MA-5-NN-80-S-3-S1-C-C5-GBA-42-42-24 90L055MA5NN80S3S1CC5GBA424224

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