提高建压效果的流体动压轴芯及轴芯轴承组件

Abstract

本实用新型公开一种提高建压效果的流体动压轴芯及轴芯轴承组件，其中，流体动压轴芯包括轴芯本体，所述轴芯本体的外周面上凹设有动压沟槽区；所述动压沟槽区具有若干组沿周向间距环绕布置的V形动压沟槽，每组V形动压沟槽包括两条交汇成V形的倾斜沟槽，相邻两组V形动压沟槽的倾斜沟槽之间形成有凸条；每组V形动压沟槽的两条倾斜沟槽交汇点作为建压中心点，所述轴芯本体的外周面上围绕所述建压中心点的外周延伸贯通设置有建压扩展槽，所述建压扩展槽至少超出两条倾斜沟槽的外侧边，如此，增大建压区域面积，油在建压中心点保留时间长，不易散，建压力度均匀、稳定、一致，有效改善甩油现象。

Claims

1. A fluid dynamic pressure shaft core for improving pressure build-up, comprising a shaft core body, wherein a dynamic pressure groove region is recessed on the outer circumferential surface of the shaft core body, characterized in that: The dynamic pressure groove area has several sets of V-shaped dynamic pressure grooves arranged around the periphery. Each set of V-shaped dynamic pressure grooves includes two inclined grooves that intersect to form a V shape. A ridge is formed between the inclined grooves of two adjacent sets of V-shaped dynamic pressure grooves. The intersection point of the two inclined grooves of each set of V-shaped dynamic pressure grooves serves as the pressure building center point. A pressure building expansion groove is provided on the outer periphery of the shaft core body, extending through the outer periphery of the pressure building center point. The pressure building expansion groove extends at least beyond the outer sides of the two inclined grooves.

2. The fluid dynamic pressure wick for improving the pressure building effect according to claim 1, characterized by: The pressure-building center point is located at the intersection of the center lines of the widths of the two inclined trenches.

3. The fluid dynamic pressure wick for improving the pressure building effect according to claim 1 or 2, characterized in that: The periphery of the pressure-building expansion groove is arc-shaped, and the distance from the pressure-building center point to the periphery of the pressure-building expansion groove is greater than half the width of the inclined groove.

4. The fluid dynamic pressure wick for improving the pressure building effect according to claim 1, wherein: The two inclined grooves of each group of V-shaped dynamic pressure grooves are symmetrically arranged relative to the corresponding radial cross section of the shaft core body.

5. The hydrodynamic pressure shaft core for improving pressure build-up effect according to claim 1, characterized in that: The pressure-building center points of several sets of V-shaped dynamic pressure trenches in the same dynamic pressure trench area are all located on the same circumference.

6. The fluid dynamic pressure wick for improving the pressure building effect according to claim 5, wherein: The total number of all pressure-building center points O in the same dynamic pressure trench area is an odd number of 3 or more, and they are arranged at uniform intervals along the outer periphery of the core body.

7. The fluid dynamic pressure wick for improving the effect of pressure building according to claim 1, wherein: The shaft core body is made of ceramic or metal.

8. The fluid dynamic pressure wick for improving the effect of pressure building of claim 1, wherein: The width of the inclined groove is greater than the width of the convex strip.

9. A shaft-core bearing assembly, comprising a bearing and a shaft core, wherein the bearing has an axially penetrating inner cavity, and the shaft core is located within the inner cavity, characterized in that: The shaft core is the hydrodynamic shaft core with improved pressure-building effect as described in any one of claims 1 to 8.

10. The shaft core bearing assembly of claim 9, wherein: The dynamic pressure groove area on the shaft core body extends beyond both ends of the effective axial working length that the shaft core body and the inner cavity of the bearing are adapted to.

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