另外還存在材料金相組織穩(wěn)定的問(wèn)題,眾所周知,鋼在淬火后總是會(huì)有殘余的奧氏體,該體長(zhǎng)時(shí)間會(huì)轉(zhuǎn)變成密度小的馬氏體。這樣一來(lái),會(huì)使零件尺寸變形,減少間隙。這個(gè)因素基本是估計(jì)不到的。所以,從這個(gè)觀點(diǎn)來(lái)看,柱塞采用刃量具鋼為好,或者說(shuō)采用時(shí)效或者冷處理,來(lái)穩(wěn)定金相組織。這個(gè)問(wèn)題在間隙小時(shí)就顯得尤為重要了。
在盤(pán)式配油的軸向柱塞泵中,配油部位是最關(guān)鍵部位之一,它直接影響著液壓泵的可靠性和壽命。配油機(jī)構(gòu)有平面和球面兩種,通常所說(shuō)的的柱塞泵,多采用平面配油機(jī)構(gòu)。配油機(jī)構(gòu)的設(shè)計(jì)以工作可靠,漏損最少,滑動(dòng)表面的磨損最少為目標(biāo)設(shè)計(jì)。這樣,會(huì)使缸體與配油盤(pán)平面之間形成一定厚度的油膜,防止金屬直接接觸,保護(hù)好機(jī)械零件。同時(shí),還要使油膜為***能耗的油膜厚度。
德國(guó)力士樂(lè)柱塞泵型號(hào):
A4VG71EP/32R-NAF02F011S
A10VSO100DR/31R-PPA12NOO
A4VG180EP2MT1/32RNZD02F0215
軸向柱塞泵
A4VSO71EO2/10R-PPB13NOO
A4VSG71HD1D/10R-PPB10K33ON
A4VSG40EM2009/10R-PPB10K310N
A4VSG71HD1A/10R-PZB10K519N
A10VS071DR/31R-PPA12N00
A4VG40EP4DMT1/32L-NSC02F015PH
AE-A10VSO140D/31R-PPB12N00
AA10VS045DFR/31R-PKC62N00
A10VSO45DFR1/31R-PPA12N00
A4VSO125DR/3DR-PPB13NOO
A4VSG40EM2009/10R-PZB10N000N
A4VS071DR/22R-PPB13NOO
A4VS0180DR/22R-PPB13N00
A4VSG71HD1A/10R-PZB10K519N
E-A10VSO45DR/31R-PPA12N00
A4VG180EP2DT1/32R-NTD02F021S
A4VS071DR/30R-PPB13N00
A4VSO71DR/10R-PPB13N00
A4VSO500E02/30R-PPH13N00
A4VG125HDDT132L-PZF02F001D
柱塞泵
A4VS0250HD1GB/30R-PZB13K35-S
A2VK28MAOR1GOPE2-S022028554
軸向柱塞泵E-A4VSO250EO2/30R-VPB25N00-SO3
A10VSO28DFLR/31R-PPA12NOO
A4VG125HDDT132L-PZF02F001D
A4VS0125DR/22R-PPB13N00
A4VS0125DR/22R-VPB13N00
AA10VSO100DFR/31L-PKC62K03
A4VSG250EM1007/30R-PPB10H029F
A4VSG250HD1P/30R-PPB10G300N
A4VSG250HD1T/30R-PPB10N000N
A4VG250HD1D1/32LNZD10F001S
A4VSG71EO1/10R-PPB10N00
A4VG90EP2DT1/32L-NAFO2F001D
A4VSG71EO1K/10R-PPB10H049N
A4VG125HD1D2/32R-NSF02F02F021P
A4VSO180EO/30L-P2B13N00
A4VSG250EO2/30R-PPB10H020N
A4VG125EP2/32+A10V028DR/31
A4VG90HWDL1/32L-NZF02F001S-SB
A4VG125EP2D1/32R-NAF02K691EP-4
A4VSG40EM4095/10R-PPB10H039F
A4VG125HDDT1/32L-PZF02F001D
E-A4VSO250EO2/30R-VPB25N00-SO3
A4VS0125DR/22R-VPB13N00
A4VG125EP2/32+A10V028DR/31
A4VSO71DR/10R-PPB13N00
A4VSG71EM3136/10R-PPB10K019N
A4VSG250HD1A/30R-PPB10K269N
A4VSO40EO/31L-P2BBN00
A4VG250HD1D1/32R-NSD10F001D
A4VSO125DR/3DR-PPB13NOO
AA10VSO140DRG/31R-PKD62N00
A4VG40EP4DMT1/32L-NSC02F015PH
A4VSO71DR/10R-PPB13N00
A4VSG71EO2K/10R-PPB10H049N
A10VSO140DFR1/31R-PPB12N00
A4VSG250EO1/22R-PPB10N000N
A4VS0250LR3G/30R-PZB13N00-S0
A4VSG250HD1U/30R-PPB10K269N
A4VSG40HS1/10R-VPB10N000N
維護(hù)與保養(yǎng) (1)在運(yùn)轉(zhuǎn)前必須檢查,控制油位。在泵***次運(yùn)轉(zhuǎn) 30 小時(shí)以后須更換潤(rùn)滑油。以后每工作200小時(shí)換油一次。 (2)全部螺絲必須擰緊。 (3)泵在運(yùn)轉(zhuǎn)過(guò)程中,潤(rùn)滑油溫度不得大于 70 ℃,介質(zhì)溫度不得大于 55 ℃ 。 當(dāng)柱塞在曲軸帶動(dòng)下做回程運(yùn)動(dòng)時(shí),泵頭工作缸內(nèi)腔溶積逐漸增大,壓力逐漸下降,造成了局部真空,排液閥處于閉合狀態(tài)。在壓差作用下進(jìn)液閥打開(kāi),液體進(jìn)入工作缸。柱塞繼續(xù)移動(dòng)到回程極限位置時(shí)吸液過(guò)程終了,這時(shí)工作缸內(nèi)吸液最多。當(dāng)柱塞做進(jìn)程運(yùn)動(dòng)時(shí),工作缸的容積逐漸減小,液體受擠壓,壓力增加,使進(jìn)液閥關(guān)閉,排液閥打開(kāi),液體從排出管中排出。柱塞達(dá)到進(jìn)程極限位置時(shí),工作腔內(nèi)的容積最小排液過(guò)程完畢。由于柱塞不斷地往復(fù)運(yùn)動(dòng),泵的吸液,排液過(guò)程就不斷交替進(jìn)行,高壓液體就不斷地輸出。
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