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美國派克 parker擺線液壓馬達的特點及分類
從能量轉換的觀點來看,液壓馬達是將輸入的液壓能轉換為了機械能,而液壓泵正好相反,所以液壓泵與液壓
達是可逆工作的液壓元件,向任何一種液壓泵輸入工作液體,都可使其變成液壓馬達工況;反之,當液壓馬達的
軸由外力矩驅動旋轉時,也可變?yōu)橐簤罕霉r。因為它們具有同樣的基本結構要素--密閉而又可以周期變化的容
積和相應的配油機構。
但是,由于液壓馬達和液壓泵的工作條件不同,對它們的性能要求也不一樣,所以同類型的液壓馬達和液壓泵
之間,仍存在許多差別。首先液壓馬達應能夠正、反兩個方向旋轉,因而要求其內部結構對稱;液壓馬達的轉速范
圍需要足夠大,特別對它的低穩(wěn)定轉速有一定的要求。因此,它通常都采用滾動軸承或靜壓滑動軸承;其次液壓馬
達由于在輸入壓力油條件下工作,因而不必具備自吸能力,但需要一定的初始密封性,才能提供必要的起動扭矩
由于存在著這些差別,使得液壓馬達和液壓泵在結構上比較相似,但不能可逆工作。
液壓馬達按其結構類型來分可以分為齒輪式、葉片式、柱塞式等型式。按液壓馬達的額定轉速分為高速和低速
兩大類。額定轉速高于500r/min的屬于高速液壓馬達,額定轉速低于500r/min的屬于低速液壓馬達。高速液壓
馬達的基本型式有齒輪式、螺杄式、葉片式和軸向柱塞式等。它們的主要特點是轉速較高、轉動慣量小,便于啟動
和制動,調節(jié)(調速及換向)靈敏庋高。通常高速液壓馬達輸出轉矩不大(僅幾十Nm到幾百Nm),所以又稱為高速小
扭矩液壓馬達。低速液壓馬達的基本型式是徑向柱塞式和擺線式,低速液壓馬達的主要特點是排量大、轉速低,因
此可直接與工作機構連接,不需要減速裝置,使傳動機構大為簡化,通常低速液壓馬達輸出轉矩較大(可達幾千
Nm),所以又稱為低速大扭矩液壓馬達
美國派克 parker擺線液壓馬達的工作原理
擺線液壓馬
以的原理(少齒差原理)制成的內嚙合擺線齒輪液壓馬達,簡稱擺線
如圖,轉子與定子是一對擺線針齒嚙合副,轉子具有zi(zi=6或8)個齒的短幅外擺線等距線齒形,定子具有
Zⅰ+1個圓弧針齒齒形,轉子和定子形成Z+1個封閉齒間容積。其中一半處于高壓區(qū),一半處于低壓區(qū)。定子固定不
動,其齒圈中心為02,轉子的中心為O。轉子在壓力油作用下產生的液壓力矩以偏心距g為半徑繞定子中心02作
星運動,即轉子一方面在繞自身的中心O自轉的同時,另一方面其中心O又繞定子中心02反向公轉,轉子在沿定子
滾動時,其進回油腔不斷地改變,但始終以連心線oⅰ02為界分成兩邊,—邊為進油,容腔容積逐漸増大;另-—邊排
油,容積逐漸縮小,將油液擠岀,通過配油機構,再經油馬達出油口排往油箱
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TG0280MS200BBBC
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TG0280MT200AAAA
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TG0280MV460AAAA
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TG0280UE200AAAA
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TG0280US020AAAB
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TG0280US030AAAC
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TG0280US030BBBD
TG0280US050AAAA
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TG0280US080AAAA
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TG0280US190AAAA
TG0280US190AAAB
TG0280US200AAAA
TG0280US200BBBB
TG0280VA020AAAB
TG0280VB030AAAB
TG0280VB080AAAB
TG0280WA030AAAA
TG0280WA610AAPG
TG0280WB030AAAA
TG0280WB080AAAA
TG0280WB080AAAB
TG0280WB080AANT
TG0280WE050AAFA
TG0280WE440AAAB
TG0280ZS020AAAB
TG0310AS010AAAB
TG0310AS050AAAA
TG0310AS050AAAB
TG0310AW070AAAB
TG0310AW260AAAB
TG0310LS080AAFG
TG0310LS081AAUN
TG0310MS010AAAB
TG0310MS030AAAB
TG0310MS050AAAB
TG0310MS051AAAA
TG0310UB080AAAB
TG0310UJ081AAPC
TG0310US080AAAA
TG0310US080AAAB
TG0310US080AAAF
