Non-contact mechanical seal ring with dual-rotating-direction hydrodynamic grooves
A fluid dynamic pressure and mechanical sealing technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problem of low leakage
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Embodiment 1
[0030] As shown in the figure, the non-contact mechanical seal ring of the present invention with double-rotation fluid dynamic pressure grooves has an inner diameter R inner = 401.62mm and an outer diameter R outer = 517.68mm on the sealing end face, and its R3 = 455.04mm The outer part is the sealing groove area 2, in which there are several ( figure 1 Shown in is 12) the same form of fluid dynamic pressure groove structure unit, the interval between each fluid dynamic pressure groove structure unit is the sealing platform area 3, the inner circumference of the sealing groove area 2 is a structure without dynamic pressure groove Unit sealing dam area 1. among them:
[0031] ——Each fluid dynamic pressure groove structural unit is a "wing-shaped" structure composed of a central groove 5 and wing grooves 4 and 6 of the same structure that are joined to it on both sides of its circumference and extend symmetrically and convergently to both sides. The dynamic pressure groove group....
Embodiment 2
[0038] The non-contact mechanical seal ring of the double-rotation fluid dynamic pressure groove of this example is based on the structure of embodiment 1. The depth of the central groove 5 is changed from equal depth to arc-shaped inner wall edge 8 to increase linearly from the peripheral wall opening 9 The groove depth of the peripheral wall opening 9 at the outer diameter is 24 microns, and the groove depth at the 8 end of the arc-shaped inner wall is 5 microns equal to the depth of the wing groove. The dynamic pressure effect of the non-equal depth wedge-shaped central groove is similar to that of Example 1, but the static pressure opening effect is better, but the static pressure leakage is also increased accordingly.
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