Orifice disc for regulating flow in damper

摘要

A shock absorber for a vehicle includes a pressure tube that defines a fluid chamber. A piston disposed within the fluid chamber divides the fluid chamber into an upper working chamber and a lower working chamber. The piston defines a compression passage and a rebound passage which extend through the piston between the upper working chamber and the lower working chamber. A valve disc assembly engages the piston and controls the flow of fluid between the upper working chamber and the lower working chamber. The valve disc assembly includes a bleed disc that defines an orifice with a substantially non-linear contour. The orifice extends to an outer diameter of the bleed disc, and forms a bleed channel between the upper working chamber and the lower working chamber.

主权项

1. A shock absorber for a vehicle comprising:
a pressure tube defining a fluid chamber; a piston disposed within the fluid chamber, the piston dividing the fluid chamber into an upper working chamber and a lower working chamber, the piston defining a compression passage and a rebound passage, wherein the compression passage and the rebound passage extend through the piston between the upper working chamber and the lower working chamber; a valve disc assembly engaging the piston and controlling the flow of fluid between the upper working chamber and the lower working chamber, wherein the valve disc assembly includes a bleed disc that defines an orifice with a substantially non-linear contour that extends to an outer diameter of the bleed disc, the orifice of the bleed disc forming a bleed channel between the upper working chamber and the lower working chamber; wherein the orifice includes a flow reservoir, a choke point, an inlet portion and an outlet portion, the choke point being disposed between the flow reservoir and the outlet portion, and the choke point providing a cross sectional area less than that of the flow reservoir and the outlet to enable the choke point to accelerate the flow of fluid from the flow reservoir to the outlet; and wherein the inlet portion forms a wall portion that tapers toward the choke point and the outlet portion forms a wall portion that tapers away from the choke point, and wherein the outlet portion forms an opening at the outer diameter of the bleed disc which has a length substantially similar to a width of the reservoir at a widest point of the reservoir.