DBW10B25X/315U6EW230N9K4E5L液壓泵的工作原理圖。柱塞2依靠彈簧4壓在偏心輪1上，偏心輪轉(zhuǎn)動(dòng)時(shí)，柱塞便作往復(fù)運(yùn)動(dòng)。柱塞向右移動(dòng)時(shí)，密封腔因容積增大而形成一定真空，在大氣壓力作用下通過單向閥5從油箱吸進(jìn)油液，這時(shí)單向閥6封閉壓油口防止系統(tǒng)油液回流；柱塞向左移動(dòng)時(shí)，密封腔4容積減小，將已吸入的油液通過單向閥6壓出，這時(shí)單向閥5封閉吸油口防止油液流回油箱。偏心輪不停地轉(zhuǎn)動(dòng)，泵就不斷地吸油和壓油。由此可見液壓泵是靠密封容積變化進(jìn)行工作的，故常稱其為容積式泵。單向閥5和6是液壓泵正常吸油和壓油所必須的配油裝置。液壓泵的工作原理及主要結(jié)構(gòu)特點(diǎn) 類型 結(jié)構(gòu)、原理示意圖 工作原理 結(jié)構(gòu)特點(diǎn) 外嚙合齒輪泵 當(dāng)齒輪旋轉(zhuǎn)時(shí)，在A腔，由于輪齒脫開使容積逐漸增大，形成真空從油箱吸油，隨著齒輪的旋轉(zhuǎn)充滿在齒槽內(nèi)的油被到B腔，在B腔，由于輪齒嚙合，容積逐漸減小，把液壓油排出 利用齒和泵殼形成的封閉容積的變化，完成泵的功能，不需要配流裝置，不能變量 結(jié)構(gòu)、價(jià)格低、徑向載荷大 內(nèi)嚙合齒輪泵 當(dāng)傳動(dòng)軸帶動(dòng)外齒輪旋轉(zhuǎn)時(shí)，與此相嚙合的內(nèi)齒輪也隨著旋轉(zhuǎn)。吸油腔由于輪齒脫開而吸油，經(jīng)隔板后，油液進(jìn)入壓油腔，壓油腔由于輪齒嚙合而排油 典型的內(nèi)嚙合齒輪泵主要有內(nèi)齒輪、外齒輪及隔板等組成 利用齒和齒圈形成的容積變化，完成泵的功能。在軸對(duì)稱位置上布置有吸、排油口。不能變量 尺寸比外嚙合式略小，價(jià)格比外嚙合式略高，徑向載荷大 德國力士樂液壓泵DBW10B25X/315U6EW230N9K4E5L葉片泵 轉(zhuǎn)子旋轉(zhuǎn)時(shí)，葉片在離心力和壓力油的作用下，尖部緊貼在定子內(nèi)表面上。這樣兩個(gè)葉片與轉(zhuǎn)子和定子內(nèi)表面所構(gòu)成的工作積，先由小到大吸油后再由大到小排油，葉片旋轉(zhuǎn)一周時(shí)，完成兩次吸油和兩次排油 利用插入轉(zhuǎn)子槽內(nèi)的葉片間容積變化，完成泵的用。在軸對(duì)稱位置上布置有兩組吸油口和排油口 徑向載荷小，噪聲較低流量脈動(dòng)小 柱塞泵 柱塞泵由缸體與柱塞構(gòu)成，柱塞在缸體內(nèi)作往復(fù)運(yùn)動(dòng)，在工作容積增大時(shí)吸油，工作容積減小時(shí)排油。采用端面配油 徑向載荷由缸體外周的大軸承所平衡，以限制缸體的傾斜 利用配流盤配流 傳動(dòng)軸只傳遞轉(zhuǎn)矩、軸徑較小。由于存在缸體的傾斜力矩，制造精度要求較高，否則易損壞配流盤 螺桿泵 一根主動(dòng)螺桿與兩根從動(dòng)螺桿相互嚙合，三根螺桿的嚙合線把螺旋槽分割成若干個(gè)密封容積。當(dāng)螺桿旋轉(zhuǎn)時(shí)，這個(gè)密封容積沿軸向移動(dòng)而實(shí)現(xiàn)吸油和排油 利用螺桿槽內(nèi)容積的移動(dòng)，產(chǎn)生泵的作用。 德國力士樂液壓泵DBW10B25X/315U6EW230N9K4E5L液壓泵的工作原理如圖3.1 所示，泵體3 和柱塞2 構(gòu)成一個(gè)密封容積，偏心輪1 由原動(dòng)機(jī)帶動(dòng)旋轉(zhuǎn)，當(dāng)偏心輪由圖示位置向下轉(zhuǎn)半周時(shí)，柱塞在彈簧6 的作用下向下移動(dòng)，密封容積逐漸增大，形成局部真空，油箱內(nèi)的油液在大氣壓作用下，頂開單向閥4 進(jìn)入密封腔中，實(shí)現(xiàn)吸油；當(dāng)偏心輪繼續(xù)再轉(zhuǎn)半周時(shí)，它推動(dòng)柱塞向上移動(dòng)，密封容積逐漸減小，油液受柱塞擠壓而產(chǎn)生壓力，使單向閥4 關(guān)閉，油液頂開單向閥5 而輸入系統(tǒng)，這就是壓油，液壓泵的供油壓力為p，供油流量為q。液壓泵都是依靠密封容積變化的原理來進(jìn)行工作的，故一般稱為容積式液壓泵，圖3-1所示的是一單柱塞液壓泵的工作原理圖，圖中柱塞2裝在缸體3中形成一個(gè)密封容積a，柱塞在彈簧4的作用下始終壓緊在偏心輪1上。原動(dòng)機(jī)驅(qū)動(dòng)偏心輪1旋轉(zhuǎn)使柱塞2作往復(fù)運(yùn)動(dòng)，使密封容積a的大小發(fā)生周期性的交替變化。當(dāng)a有小變大時(shí)就形成部分真空，使油箱中油液在大氣壓作用下，經(jīng)吸油管頂開單向閥6進(jìn)入油箱a而實(shí)現(xiàn)吸油；反之，當(dāng)a由大變小時(shí)，a腔中吸滿的油液將頂開單向閥5流入系統(tǒng)而實(shí)現(xiàn)壓油。這樣液壓泵就將原動(dòng)機(jī)輸入的機(jī)械能轉(zhuǎn)換成液體的壓力能，原動(dòng)機(jī)驅(qū)動(dòng)偏心輪不斷旋轉(zhuǎn)，液壓泵就不斷地吸油和壓油。 德國力士樂液壓泵DBW10B25X/315U6EW230N9K4E5L2.液壓泵的特點(diǎn) 單柱塞液壓泵具有一切容積式液壓泵的基本特點(diǎn)： （1）具有若干個(gè)密封且又可以周期性變化空間。液壓泵輸出流量與此空間的容積變化量和單位時(shí)間內(nèi)的變化次數(shù)成正比，與其他因素?zé)o關(guān)。這是容積式液壓泵的一個(gè)重要特性。 （2）油箱內(nèi)液體的壓力必須恒等于或大于大氣壓力。這是容積式液壓泵能夠吸入油液的外部條件。因此，為液壓泵正常吸油，油箱必須與大氣相通，或采用密閉的充壓油箱。 （3）具有相應(yīng)的配流機(jī)構(gòu)，將吸油腔和排液腔隔開，液壓泵有規(guī)律地、連續(xù)地吸、排液體。液壓泵的結(jié)構(gòu)原理不同，其配油機(jī)構(gòu)也不相同。如圖3-1中的單向閥5、6就是配油機(jī)構(gòu)。 容積式液壓泵中的油腔處于吸油時(shí)稱為吸油腔。吸油腔的壓力決定于吸油高度和吸油管路的阻力，吸油高度過高或吸油管路阻力太大，會(huì)使吸油腔真空度過高而影響液壓泵的自吸能力；油腔處于壓油時(shí)稱為壓油腔，壓油腔的壓力則取決于外負(fù)載和排油管路的壓力損失，從理論上講排油壓力與液壓泵的流量無關(guān)。 容積式液壓泵排油的理論流量取決于液壓泵的有關(guān)幾何尺寸和轉(zhuǎn)速，而與排油壓力無關(guān)。但排油壓力會(huì)影響泵的內(nèi)泄露和油液的壓縮量，從而影響泵的實(shí)際輸出流量，所以液壓泵的實(shí)際輸出流量隨排油壓力的升高而降低。 液壓泵按其在單位時(shí)間內(nèi)所能輸出的油液的體積可調(diào)節(jié)而分為定量泵和變量泵兩類；按結(jié)構(gòu)形式可分為齒輪式、葉片式和柱塞式三大類。 上海明豐倉庫大量現(xiàn)貨博世力士樂中國 R901110456 HED8OA2X/200K14V R901108236 HED8OH2X/350K14AS R901108003 HED8OP2X/200K14AS R901107922 HED8OA2X/350K14SV R901107790 HED8OP2X/100K14AS R901107128 HED8OH2X/100K14A R901107126 HED8OA2X/200K14KS R901107093 HED8OP2X/200K14S R901107087 HED8OA2X/350K14KS R901107086 HED8OH2X/50K14AS R901106509 HED8OP2X/100K14S R901106505 HED8OH2X/100K14AS R901106504 HED8OP2X/50K14S R901106498 HED8OH2X/100K14KS R901106453 HED8OP2X/350K14 R901106452 HED8OA2X/200K14AS R901106449 HED8OP2X/630K14S R901106448 HED8OA2X/200K14KW R901106259 HED8OA2X/100K14A R901102754 HED8OA2X/50K14KW R901102747 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HED1KA4X/100U15 R900222166 HED2OA2X/400KL110 R900221792 HED3OA3X/100K6L24 R900221791 HED3OA3X/100K6 R900221668 HED2OA2X/100KL110 R900221665 HED1KA4X/350KL48 R900220812 HED1KA4X/350K6 R900220606 HED2OA2X/200KL48 R900220510 HED3OA3X/25K6L24 R900220325 HED2OA2X/200K6L24 R900219964 HED2OA2X/400K6 R900219963 HED2OA2X/200K6 R900219962 HED2OA2X/400KL110/12 R900219615 HED3OA3X/25K6 R900218945 HED5OP12X/210K14V R900218308 HED2OA2X/100KL220 R900218307 HED5OA12X/50K14V R900218306 HED5OA12X/210K14V R900218304 HED3OA3X/400K6 R900217913 HED3OA3X/200K6L110 R900216719 HED3OA3X/100K6Q R900216214 HED1KA4X/350KL110 R900212487 HED3OA3X/400K6L110 R900212220 HED2OA2X/400K6L24 R900209599 HED3OA3X/25KL24 R900209148 HED3OA3X/400K6L220Q R900208430 HED3OA3X/200K6L24 R900208108 HED5OP22X/350K14 R900207773 HED3OA3X/200K6 R900207699 HED3OA3X/63K6/12 R900206414 HED2OA2X/400K6L220 R900206413 HED2OA2X/25K6L220 R900204958 HED5OK12X/100K14 R900204957 HED5OK12X/50K14 R900203864 HED1OA4X/350KL110 R900062362 HED5OA12X/350K14 R900059123 HED3OA3X/100K6L220 R900058282 HED5OP12X/630K14 R900058051 HED5OP12X/100K14 R900571917 HED8OP1X/350K14S R900563879 HED8OH1X/200K14 R900536049 HED8OH1X/350K14 R900514952 HED5OA12X/50K14 R900466267 HED3OA3X/400KL24 R900457574 HED2OA2X/63L24 R900456950 HED2OA2X/200KL24 R900456417 HED5OP12X/210K14 R900451231 HED2OA2X/400KL24 R900444254 HED2OA2X/63 R900443175 HED2OA2X/200 R900442482 HED2OA2X/400 R900442202 HED3OA3X/400K R900442140 HED3OA3X/100 R900442022 HED2OA2X/200L24 R900441948 HED3OA3X/200KL220 R900441785 HED3OA3X/200 R900433703 HED1OA4X/50KL24 R900424715 HED1OA4X/50L24 R900383856 HED1OA4X/350 R900383855 HED1OA4X/100 R900383854 HED1OA4X/50 R900383853 HED1KA4X/500 R900336080 HED1OA4X/350KL24 R900218306 HED5OA12X/210K14V R900207773 HED3OA3X/200K6 R900058282 HED5OP12X/630K14 R900049550 HED8OP1X/100K14A R900031147 HED8OP1X/350K14KW 上海明豐機(jī)電設(shè)備有限公司代理銷售德國博世力士樂Bosch Rexroth液壓氣動(dòng)元件 、德國博世力士樂Bosch Rexroth電磁換向閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth軸向柱塞泵液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth齒輪泵液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth葉片泵液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth溢流閥、德國博世力士樂Bosch Rexroth節(jié)流閥、德國博世力士樂Bosch Rexroth壓力開關(guān)、德國博世力士樂Bosch Rexroth安全閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth插裝閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth充液閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth單向閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth方向閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth蓋板液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth減壓閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth節(jié)流閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth截止閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth冷卻器液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth流量閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth升降閥液壓氣動(dòng)元件、德國博世力士樂Bosch Rexroth順序閥液壓氣動(dòng)元件等。