Flow control screen for use with hydraulic accumulator, hydraulic hammer using same, and manufacturing method

摘要

A hydraulic accumulator includes an accumulator housing defining a gas reservoir and a liquid volume. A flexible membrane is positioned within the accumulator housing and separates the gas reservoir and the liquid volume. A flow control screen defines a wall of the accumulator housing, has a screen thickness, and includes an exterior face opposing a membrane engagement face. A first slot is formed through the exterior face and has a first slot depth that is less than the screen thickness. A second slot is formed through the membrane engagement face and has a second slot depth that is less than the screen thickness. The first slot and the second slot intersect to fluidly connect an exterior of the accumulator housing with the liquid volume.

主权项

1. A hydraulic accumulator, comprising:
an accumulator housing defining a gas reservoir and a liquid volume; a flexible membrane positioned within the accumulator housing and separating the gas reservoir and the liquid volume; and a flow control screen having a screen thickness and including an exterior face opposing a membrane engagement face, wherein a first set of slots is formed in the exterior face and has a first slot depth that is less than the screen thickness, the first set of slots is elongated and radially oriented from a center portion of the flow control screen, wherein a second set of slots is formed in the membrane engagement face and has a second slot depth that is less than the screen thickness, the second set of slots includes continuous, concentric circular slots, and wherein the first set of slots and the second set of slots intersect to fluidly connect an exterior of the accumulator housing with the liquid volume.