上海維特銳實業(yè)發(fā)展有限公司
主營產(chǎn)品: ATOS阿托斯閥,賀德克傳感器,ACE緩沖器 |
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上海維特銳實業(yè)發(fā)展有限公司
主營產(chǎn)品: ATOS阿托斯閥,賀德克傳感器,ACE緩沖器 |
聯(lián)系電話
REXROTH力士樂軸向柱塞泵的排量和流量
1) 排量若柱塞數(shù)為z,柱塞直徑為d,柱塞孔的分布圓直徑為D, 斜盤傾角為γ, 則柱塞的行程為:h=Dtanγ,故缸體轉(zhuǎn)一轉(zhuǎn), 泵的排量為: V=Zhπd /4= π d2 ZD(tanγ)/4 2) 流量 理論流量: qT = Vn = πd2D(tanγ)z/4 實際流量: q = qTηpv =πd2D(tanγ)zηpv/4 結(jié)論:
(1) qT = f(幾何參數(shù)、 n、γ)
(2) n = c 大小變化,流量大小變化 γ< 方向變化,輸油方向變化 變量原理: ∵ γ= 0 q = 0 大小變化,流量大小變化 γ< 方向變化,輸油方向變化 ∴ 軸向柱塞泵可作為雙向變量泵 瞬時流量: 柱塞的軸向位移: s = a’b’=oa’-ob’ = Dtanγ/2 – Dcosωttanγ/2 = D(1-cosωt)tanγ/2 柱塞的瞬時移動速度: u = ds/dt = Dωtanγsinωt/2 單個柱塞的瞬時流量為: q‘=πd2u/4=πd2Dωtanγsinωt/8 ∵ 單個柱塞的瞬時流量按正弓玄規(guī)律變化 ∴ 整個泵的瞬時流量也按正弓玄規(guī)律變化 故 瞬時流量是脈動的,其脈動情況用脈動率δ來表示, 一般: z = 奇數(shù),δ小 z = 偶數(shù),δ大 常取z = 7 或z = 9
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