為非對(duì)稱型結(jié)構(gòu),卸荷槽只開(kāi)在分油窗口的一端,在安裝時(shí),配流盤的中心線沿缸體旋轉(zhuǎn)方向相對(duì)于斜盤垂直中心線偏轉(zhuǎn)一個(gè)角度。當(dāng)柱塞由吸油向排油過(guò)渡時(shí).柱塞孔工作容積***,剛好與吸油窗口脫離,當(dāng)密封容積由大變小時(shí),通過(guò)卸荷槽與排油窗口相通,使壓力平穩(wěn)上升。同理,當(dāng)柱塞由排油向吸油過(guò)渡時(shí),柱塞孔容積達(dá)到最小,剛好.與排油窗口脫離,當(dāng)容積由小變大時(shí),通過(guò)卸荷槽與吸液窗口相通.使壓力平穩(wěn)減小試驗(yàn)證明,這種非對(duì)稱結(jié)構(gòu)對(duì)于減少液壓沖擊和噪聲的效果比較顯著.但泵只能單方向轉(zhuǎn)動(dòng),不能反轉(zhuǎn)工作。
該泵軸端密封設(shè)計(jì)為兩種形式,一種是機(jī)械密封,另一種是填料密封,可根據(jù)具體使用情況和用戶要求確定。 外嚙合泵主要由主、從動(dòng)齒輪,驅(qū)動(dòng)軸,泵體及側(cè)板等主要零件構(gòu)成。泵體內(nèi)相互嚙合的主、從動(dòng)齒輪與兩端蓋及泵體一起構(gòu)成密封工作容積,齒輪的嚙合點(diǎn)將兩腔隔開(kāi),形成了吸、壓油腔,吸油腔內(nèi)的輪齒脫離嚙合,密封工作腔容積不斷增大,形成部分真空,油液在大氣壓力作用下從油箱經(jīng)吸油管進(jìn)入吸油腔,并被旋轉(zhuǎn)的輪齒帶入壓油腔。
德國(guó)力士樂(lè)柱塞泵型號(hào):
A4VS0125DFR/30R-PPB13N00
A4VS0500HSK/30L-PPH13N0010SET
A4VG125DA2D2/32R-NAF02F021DT
A4FO500/30R-PZH25N00
A10VS018DR/31R-PPA12NOO
A4VG125HD1D2/32R-NTF02F691P
A4VG125EP2/32+A10V028DR/31
A10V028DR/31R-PSC12N00
變量軸向柱塞泵A4VSO125DR/30R-PPB13N00
A4VSG71EM3120/10R-PPB10K019N
A4VSG71HD1T/10R-PPB100419N
A4VG90EP2DT1/32L-NAFO2F001D
A4VG56EZ2DM1/32R-NSC02F013SH
E-A4VSO250EO2/30R-VPB25N00-SO3
A4VS071DR/30R-PPB13N00
A4VSG250HS1/30R-PPB10N000N
A4VS0250DR/22R-PPB13N00
柱塞泵A4VSG750HD/22R-PPH10NOO
A4VSG71EM3120/10R-PPB10K019N
A4VSG250HSE/30R-PPB10N000N
A4VSG40HD1D/10R-PPB10K019N
A4VSG71EO1/10R-PPB10N00
A4VG125HD1D2/32R-NTF02F691P
A4VS0250HD1GB/30R-PZB13K35-S
A4VG180EP2DT1/32R-NTD02F021S
A4VS0250DR/30R-PPB13N00
A4VS040DR/10R-PPB13NOO
A4VS0250DR/30RPPB13N00
A4VG180EP2DT1/32R-NTD02F021S
A4VSG40HS1/10R-VPB10N000N
A4VG71DWDMT2/23L-NZF02F041D
A4VSG250HS/10R-PPB10N00
柱塞泵
A4VSG71DS1E/10W-PZB10T001N
軸向柱塞泵E-A4VSO250EO2/30R-VPB25N00-SO3
A4VG125HDM1/32R-NSF02F691S-S
A4VSG71DS1E/10W-PZB10T001N
A4VSG71EM3120/10R-PPB10K019N
A4VSG40EM4095/10R-PPB10H039F
A4VSG250EM3066/30R-PPB10N009N
A4VSO40DR10RPPB13100N
A4VSG250HD1D/30R-PPB10K269N
A4VG125HDMT1-32R-NSF02F691S-S
恒壓變量泵E-
A4VG71DWDMT2/23L-NZF02F041D泵
A4VS0500HSK/30R-PPH13N0010SET
油泵A4VSO180DFR/30R-PPB13N00
A4VG125HD1D2/32R-NSF001S
A10VSO100DFLR/31R-PPA12K26
A4VSG40HS1/10R-PPB10N00
A4VSO71EO2/10R-PPB13NOO
A4VSG250HDA/30R-PPB10NOO9N
柱塞泵A4VSG750HD/22R-PPH10NOO
A4VG125HDDT1/32L-PZF02F001D
A4VS0500HSK/30R-PPH13N0010SETE-
A4VS0125DR30R-PPB13N00
A4VSG250HS1/30R-PPB10N000N
A4VS0125DR30R-PPB13N00
E-A4VSO125DRPPB13NOO
A4VS0500HSK/30L-PPH13N0010SET
A4VSO180DRG/30R-PZB1+A4VSO40DRG/10R-PZB13
A4VSG40HD1D/10R-PZB10N000N
A10V028DR/31R-PSC12N00
A4VS0250DR/30RPPB13N00
AE-A10VSO140D/31R-PPB12N00
A4VSG250EM1007/30R-PPB10H029F
徑向柱塞泵可分為閥配流與軸配流兩大類。閥配流徑向柱塞泵存在故障率高、效率低等缺點(diǎn)。國(guó)際上70、80年***展的軸配流徑向柱塞泵克服了閥配流徑向柱塞泵的不足。由于徑向泵結(jié)構(gòu)上的特點(diǎn),固定了軸配流徑向柱塞泵比軸向柱塞泵耐沖擊、壽命長(zhǎng)、控制精度高。變量行程短泵的變量是在變量柱塞和限位柱塞作用下,改變定子的偏心距實(shí)現(xiàn)的,而定于的***偏心距為 5—9mm(根據(jù)排量大小不同),變量行程很短。 液壓柱塞泵靠氣壓供油的液壓油箱,在每次啟動(dòng)機(jī)器后,必須等液壓油箱達(dá)到使用氣壓后,才能操作機(jī)械。直軸斜盤式柱塞泵分為壓力供油型的自吸油型兩種。壓力供油型液壓泵大都采用有氣壓的油箱,也有液壓泵本身帶有補(bǔ)油分泵向液壓泵進(jìn)油口提供壓力油的。自吸油型液壓泵的自吸油能力很強(qiáng),無(wú)需外力供油。
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