Sliding component

An eccentric sliding assembly comprising:

• a first sliding component having an annular shape with high-pressure and low-pressure fluids facing inside and outside of the sliding component and having a sliding surface,
• a second sliding component having a sliding surface which is slidable with the sliding surface of the first sliding component;
• an eccentric driving device configured to drive the sliding surface of the first sliding component relative to the sliding surface of the second sliding component such that a center of the first sliding component imaginarily draws a circle which is eccentric with respect to a center of the second sliding component while keeping a non-rotation state of the first sliding component with respect to the center of the first sliding component in a plan view, or configured to drive the sliding surface of the second sliding component relative to the sliding surface of the first sliding component such that the center of the second sliding component imaginarily draws a circle which is eccentric with respect to the center of the first sliding component while keeping a non-rotation state of the second sliding component with respect to the center of the second sliding component in the plan view;
• wherein the sliding surface of the first sliding component has a radial width smaller than a radial width of the sliding surface of the second sliding component,
• the sliding surface of at least the first sliding component is provided with a plurality of high-pressure grooves open to a space in which the high-pressure fluid exists and a plurality of low-pressure grooves open to a space in which the low-pressure fluid exists, and
• the high-pressure grooves and the low-pressure grooves are arranged in a circumferential direction.