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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,也可變為液壓泵工況。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(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,一半處于低壓區。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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TG0280WA030AAAA
TG0280WA610AAPG
TG0280WB030AAAA
TG0280WB080AAAA
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TG0280WB080AANT
TG0280WE050AAFA
TG0280WE440AAAB
TG0280ZS020AAAB
TG0310AS010AAAB
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TG0310AS050AAAB
TG0310AW070AAAB
TG0310AW260AAAB
TG0310LS080AAFG
TG0310LS081AAUN
TG0310MS010AAAB
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TG0310MS050AAAB
TG0310MS051AAAA
TG0310UB080AAAB
TG0310UJ081AAPC
TG0310US080AAAA
TG0310US080AAAB
TG0310US080AAAF
