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外嚙合齒輪泵困油面積和卸荷面積計算式的建
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Formulas for Trapped-oil Area and Relief-load Area of External Spur-gear Pump
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    摘要:

    為利于后續(xù)困油現(xiàn)象的定量分析，基于泵齒輪傳動的幾何關(guān)系及它與卸荷槽的空間位置關(guān)系的解析和過渡曲線的適當(dāng)簡化，以嚙合點與節(jié)點之間的距離為變量，建立了困油面積的計算公式和卸荷面積的擬合公式，并對計算結(jié)果與由精確的虛擬模型獲得的測量結(jié)果進(jìn)行了對比。研究表明：困油面積和卸荷面積均可采用不同指數(shù)的拋物線線型表示，過渡曲線的簡化是可行的，提供的擬合常數(shù)可直接使用。得出的兩面積計算公式正確可靠，可直接用于后續(xù)困油壓力的預(yù)測。

    Abstract:

    In order to study quantitatively the trapped-oil phenomenon, with distance between meshing point and nodal point as a variable, a formula for calculating trapped-oil area and a fit formula for calculating relief-load area were derived from the geometrical relationship of gear transmission and positional relationship of relief groove. The calculated results were compared with the measured results from an accurate 3-D model. The results indicated that trapped-oil area and relief-load area could be expressed by a parabola with different index; simplified transition curve is feasible for calculating the two areas; fitting constant derived could be directly used aimed at different tooth number and module for calculating relief-load area. Finally, the two area-formulas were proved feasible to be used for forecasting the trapped oil pressure. 

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李玉龍,劉焜.外嚙合齒輪泵困油面積和卸荷面積計算式的建[J].農(nóng)業(yè)機(jī)械學(xué)報,2009,40(6):203-207. Formulas for Trapped-oil Area and Relief-load Area of External Spur-gear Pump[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(6):203-207.

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